Dan Carpenter [Thu, 17 Aug 2017 14:44:44 +0000 (17:44 +0300)]
scsi: hpsa: fix the device_id in hpsa_update_device_info()
The parentheses are in the wrong place so we specify the length as
"sizeof(this_device->device_id) < 0" which is zero.
Fixes: 988b87edd231 ("scsi: hpsa: Ignore errors for unsupported LV_DEVICE_ID VPD page") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Arvind Yadav [Wed, 16 Aug 2017 04:59:24 +0000 (10:29 +0530)]
scsi: aha1542: constify pnp_device_id
pnp_device_id are not supposed to change at runtime. All functions
working with pnp_device_id provided by <linux/pnp.h> work with const
pnp_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
-EINVAL will be returned even though the "adapter" argument is perfectly
valid.
Change this so that we only return -EINVAL if the provided string is
invalid. If the host does not implement a ->host_reset function we'll
return -EOPNOTSUPP.
[mkp: tweaked patch description]
Signed-off-by: weiping zhang <zhangweiping@didichuxing.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Arvind Yadav [Wed, 16 Aug 2017 04:58:40 +0000 (10:28 +0530)]
scsi: ncr5380: constify pnp_device_id
pnp_device_id are not supposed to change at runtime. All functions
working with pnp_device_id provided by <linux/pnp.h> work with const
pnp_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Acked-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Chad Dupuis [Tue, 15 Aug 2017 17:08:20 +0000 (10:08 -0700)]
scsi: qedf: Fix up modinfo parameter name for 'debug' in modinfo output.
Because we were passing 'qedf_debug' instead of 'debug' to the
MODULE_PARM_DESC() macro, modinfo listed the parameter name as 'qedf_debug'
instead of it's proper name 'debug'. Correct the parameter name.
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Chad Dupuis [Tue, 15 Aug 2017 17:08:18 +0000 (10:08 -0700)]
scsi: qedf: Corrent VLAN tag insertion in fallback VLAN case.
Currently in the driver the qedf_ctx attribute vlan_hw_insert is used to
which whether to insert a VLAN tag in FIP frames (except for FIP VLAN
request which is explicitly sent out untagged at least from the driver's
point of view).
When we receive a FIP VLAN response, we set qedf->vlan_hw_insert to 0 which
makes the qedf_fip_send function insert the VLAN. However when we exhaust
our FIP VLAN retries, we do not set qedf->vlan_hw_insert to 0 which means
that the driver will not tag the FIP frame with the correct VLAN ID. The
result that was observed on the wire is that some entity either in the LL2
or L2 firmware is adding a NULL VLAN tag which can cause FIP solicitation
to fail.
The offload FCoE frame function, qedf_xmit, does not use the vlan_hw_insert
attribute to decide whether to tag frames with the FIP/FCoE VLAN. Instead
it unilaterially tags the offload frames with the VLAN ID stored in
qedf->vlan_id. This is the correct behavior so the driver can guarantee
that non-offload FIP frames go out with the correct VLAN ID.
Also use the Linux network layer helpers instead of doing the VLAN insert
manually.
Also fix setting the fallback VLAN so that it used the module parameter and
is not hardcoded to 1002 (though 1002 is the default).
[mkp: fixed typo]
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Chad Dupuis [Tue, 15 Aug 2017 17:08:17 +0000 (10:08 -0700)]
scsi: qedf: Use granted MAC from the FCF for the FCoE source address if it is available.
Currently in the driver we've been using the fc_fcoe_set_mac() function to
set the source MAC for FCoE traffic. This works well in most cases as it
uses the spec. default FCF-MAC. However, if the administrator changes the
FCF-MAC switch, then any FCoE traffic we send will be dropped by the
switch.
Instead we should check the granted MAC from the FLOGI payload and use that
address if it is present. Otherwise, fall back to using the the default
FCF-MAC and the fabric ID of the port as the FCoE MAC address.
Once this address is known we need to set it when doing non-offload
traffic, offload traffic and setting the data_src_address libfcoe uses for
FIP keep alive messages.
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Chad Dupuis [Tue, 15 Aug 2017 17:08:16 +0000 (10:08 -0700)]
scsi: qedf: Set WWNN and WWPN based on values from qed.
If dev_info.wwpn and dev_info.wwnn are set by qed use these values to set
the WWNs of the port. Otherwise fall back to the old method using
fcoe_wwn_from_mac().
Signed-off-by: Chad Dupuis <chad.dupuis@cavium.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Colin Ian King [Tue, 15 Aug 2017 13:51:45 +0000 (14:51 +0100)]
scsi: mpt3sas: fix pr_info message continuation
An optional discovery status should be printed with a pr_cont and needs
a leading space to make it more readable. The final new line should also
be a pr_cont and the indentation is out by one, so fix that too.
Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Hannes Reinecke [Tue, 15 Aug 2017 06:58:08 +0000 (08:58 +0200)]
scsi: cciss: Drop obsolete driver
The hpsa driver now has support for all boards the cciss driver
used to support, so this patch removes the cciss driver and
make hpsa an alias to cciss.
Signed-off-by: Hannes Reinecke <hare@suse.com> Acked-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Hannes Reinecke [Tue, 15 Aug 2017 06:58:07 +0000 (08:58 +0200)]
scsi: hpsa: do not print errors for unsupported report luns format
Legacy boards might not support the 'extended' report luns format,
but as this is to be expected we don't need to print out an error here.
Signed-off-by: Hannes Reinecke <hare@suse.com> Acked-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Hannes Reinecke [Tue, 15 Aug 2017 06:58:06 +0000 (08:58 +0200)]
scsi: hpsa: Ignore errors for unsupported LV_DEVICE_ID VPD page
Legacy boards might not support the LV_DEVICE_ID VPD page, so
we shouldn't print out an error message here.
Signed-off-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Hannes Reinecke [Tue, 15 Aug 2017 06:58:05 +0000 (08:58 +0200)]
scsi: hpsa: disable volume status check for legacy boards
Legacy boards might not support volume status, so assume
the volume is online here.
Signed-off-by: Hannes Reinecke <hare@suse.com> Acked-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Hannes Reinecke [Tue, 15 Aug 2017 06:58:04 +0000 (08:58 +0200)]
scsi: hpsa: add support for legacy boards
Add support for legacy boards, ensuring to enable the driver for
those boards only when 'hpsa_allow_any' is set.
The attribute 'legacy_board' is set to '1' if the device is
a legacy board, and '0' otherwise.
Signed-off-by: Hannes Reinecke <hare@suse.com> Acked-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: cxlflash: Fix an error handling path in 'cxlflash_disk_attach()'
'rc' is known to be 0 at this point. If 'create_context()' fails,
returns -ENOMEM instead of 0 which means success.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Helge Deller [Thu, 10 Aug 2017 19:08:49 +0000 (21:08 +0200)]
scsi: sym53c8xx: Avoid undefined behaviour
On parisc I see this UBSAN warning with a sym53c896:
UBSAN: Undefined behaviour in ./drivers/scsi/sym53c8xx_2/sym_hipd.c:762:24
index -1903078336 is out of range for type 'u32 [7]'
Avoid this warning by switching to div64_ul().
[mkp: fix typo]
Signed-off-by: Helge Deller <deller@gmx.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Hannes Reinecke [Fri, 11 Aug 2017 06:53:47 +0000 (08:53 +0200)]
scsi: make 'state' device attribute pollable
While the 'state' attribute can (and will) change occasionally,
calling 'poll()' or 'select()' on it fails as sysfs is never
notified that the state has changed.
With this patch calling 'poll()' or 'select()' will work
properly.
Signed-off-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Rework scsi_internal_device_unblock_nowait() into using a switch
statement. No functional changes.
Signed-off-by: Hannes Reinecke <hare@suse.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with const
pci_device_id. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Acked-by: Bradley Grove <bgrove@attotech.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: virtio: virtio_scsi: Set can_queue to the length of the virtqueue.
Since switching to blk-mq as the default in commit 5c279bd9e406
("scsi: default to scsi-mq"), virtio-scsi LUNs consume about 10x as
much kernel memory.
qemu currently allocates a fixed 128 entry virtqueue. can_queue
currently is set to 1024. But with indirect descriptors, each command
in the queue takes 1 virtqueue entry, so the number of commands which
can be queued is equal to the length of the virtqueue.
Note I intend to send a patch to qemu to allow the virtqueue size to be
configured from the qemu command line.
Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: virtio: Reduce BUG if total_sg > virtqueue size to WARN.
If using indirect descriptors, you can make the total_sg as large as you
want. If not, BUG is too serious because the function later returns
-ENOSPC.
Signed-off-by: Richard W.M. Jones <rjones@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Manish Rangankar [Thu, 10 Aug 2017 13:32:17 +0000 (06:32 -0700)]
scsi: qedi: Limit number for CQ queues.
[qed_sp_iscsi_func_start:189(host_7-0)]Cannot satisfy CQ amount. Queues
requested 8, CQs available 4. Aborting function start
Above condition will resolve as management firmware is capable of
telling us the number of CQs available for a given PF, qed will
communicate the same number to qedi, So that qedi will know how much CQs
are allowed.
Signed-off-by: Manish Rangankar <manish.rangankar@cavium.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Thu, 10 Aug 2017 16:09:43 +0000 (00:09 +0800)]
scsi: hisi_sas: replace kfree with scsi_host_put
Instances of kfree(shost) should be replaced with scsi_host_put().
In addition, a missing scsi_host_put() is added for error path in
hisi_sas_shost_alloc_pci() and v3 driver removal.
Signed-off-by: Pan Bian <bianpan2016@163.com> # For main.c changes Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiang Chen [Thu, 10 Aug 2017 16:09:41 +0000 (00:09 +0800)]
scsi: hisi_sas: add phy_set_linkrate_v3_hw()
Add function to set linkrate for v3 hw.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiang Chen [Thu, 10 Aug 2017 16:09:39 +0000 (00:09 +0800)]
scsi: hisi_sas: update some v3 register init settings
This patch updates some register setting according to recommendation
from HW designer and experiment.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiang Chen [Thu, 10 Aug 2017 16:09:40 +0000 (00:09 +0800)]
scsi: hisi_sas: add reset handler for v3 hw
Use ACPI "_RST" method to reset the controller, since FLR is not
supported.
Function hisi_sas_stop_phys() is introduced to remove some code
duplication.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiang Chen [Thu, 10 Aug 2017 16:09:38 +0000 (00:09 +0800)]
scsi: hisi_sas: kill tasklet when destroying irq in v3 hw
This patch adds calls to kill CQ takslets v3 hw during probe failure.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
The channel interrupt is to process all the interrupts except PHY
UP/DOWN and broadcast interrupt. So we need to clear all the interrupts
except those 3 interrupts after processing channel interrupts.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Modify STP link timer from 10ms to 500ms. Also add the register address.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiang Chen [Thu, 10 Aug 2017 16:09:35 +0000 (00:09 +0800)]
scsi: hisi_sas: add status and command buffer for internal abort
For v3 hw, internal abort function required status and command buffer to
be set, so add necessary code for this.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiaofei Tan [Thu, 10 Aug 2017 16:09:34 +0000 (00:09 +0800)]
scsi: hisi_sas: support zone management commands
Add two ATA commands, ATA_CMD_ZAC_MGMT_IN and ATA_CMD_ZAC_MGMT_OUT in
hisi_sas_get_ata_protocol(), to support SATA SMR disk.
Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiang Chen [Thu, 10 Aug 2017 16:09:33 +0000 (00:09 +0800)]
scsi: hisi_sas: service interrupt ITCT_CLR interrupt in v2 hw
This patch is a fix related to freeing a device in v2 hw driver.
Before, we polled to ITCT CLR interrupt to check if a device is free.
This was error prone, as if the interrupt doesn't occur in 10us, we miss
processing it.
To avoid this situation, service this interrupt and sync the event with
a completion.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiang Chen [Thu, 10 Aug 2017 16:09:32 +0000 (00:09 +0800)]
scsi: hisi_sas: add irq and tasklet cleanup in v2 hw
This patch adds support to clean-up allocated IRQs and kill tasklets
when probe fails and for driver removal.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiang Chen [Thu, 10 Aug 2017 16:09:31 +0000 (00:09 +0800)]
scsi: hisi_sas: remove repeated device config in v2 hw
This patch removes some repeated configurations:
(1) The device id of the device is already set in the alloc function, so
we don't need to modify in free device function.
(2) Field dev_type and dev_status are configured in hisi_sas_dev_gone(),
so there is no need for repeated config in free_device_v3_hw.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
John Garry [Thu, 10 Aug 2017 16:09:30 +0000 (00:09 +0800)]
scsi: hisi_sas: use array for v2 hw ECC errors
The code to print ECC errors in v2 hw driver is very repetitive. This
patch condensed the code by looping an array of errors.
Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Shiju Jose <shiju.jose@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiaofei Tan [Thu, 10 Aug 2017 16:09:29 +0000 (00:09 +0800)]
scsi: hisi_sas: add v2 hw DFX feature
Add DFX feature for v2 hw. We are adding support for
the following errors:
- loss_of_dword_sync_count
- invalid_dword_count
- phy_reset_problem_count
- running_disparity_error_count
Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiang Chen [Thu, 10 Aug 2017 16:09:28 +0000 (00:09 +0800)]
scsi: hisi_sas: fix v2 hw underflow residual value
The value dw0 is the residual bytes when UNDERFLOW error happens, but we
filled the residual with the value of dw3 before. So change the residual
from dw3 to dw0.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
When some interrupts happen together, we need to process every interrupt
one-by-one, and should not return immediately when one interrupt process
is finished being processed.
Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Xiaofei Tan [Thu, 10 Aug 2017 16:09:26 +0000 (00:09 +0800)]
scsi: hisi_sas: fix reset and port ID refresh issues
This patch provides fixes for the following issues:
1. Fix issue of controller reset required to send commands. For reset
process, it may be required to send commands to the controller, but
not during soft reset. So add HISI_SAS_NOT_ACCEPT_CMD_BIT to prevent
executing a task during this period.
2. Send a broadcast event in rescan topology to detect any topology
changes during reset.
3. Previously it was not ensured that libsas has processed the PHY up
and down events after reset. Potentially this could cause an issue
that we still process the PHY event after reset. So resolve this by
flushing shot workqueue in LLDD reset.
4. Port ID requires refresh after reset. The port ID generated after
reset is not guaranteed to be the same as before reset, so it needs
to be refreshed for each device's ITCT.
Signed-off-by: Xiaofei Tan <tanxiaofei@huawei.com> Signed-off-by: John Garry <john.garry@huawei.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Kevin Barnett [Thu, 10 Aug 2017 18:47:15 +0000 (13:47 -0500)]
scsi: smartpqi: change driver version to 1.1.2-125
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com> Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Kevin Barnett [Thu, 10 Aug 2017 18:47:09 +0000 (13:47 -0500)]
scsi: smartpqi: add in new controller ids
Update the driver’s PCI IDs to match the latest Microsemi controllers
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com> Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Kevin Barnett [Thu, 10 Aug 2017 18:47:03 +0000 (13:47 -0500)]
scsi: smartpqi: update kexec and power down support
Add PQI reset to driver shutdown callback to work around controller bug.
During an 1.) OS shutdown or 2.) kexec outside of a kdump, the Linux
kernel will clear BME on our controller.
If BME is cleared during a controller/host PCIe transfer, the controller
will lock up.
So we perform a PQI reset in the driver's shutdown callback function to
eliminate the possibility of a controller/host PCIe transfer being
active when the kernel clears BME immediately after calling the driver's
shutdown callback.
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com> Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Kevin Barnett [Thu, 10 Aug 2017 18:46:57 +0000 (13:46 -0500)]
scsi: smartpqi: cleanup doorbell register usage.
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com> Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Kevin Barnett [Thu, 10 Aug 2017 18:46:51 +0000 (13:46 -0500)]
scsi: smartpqi: update pqi passthru ioctl
- make pass-thru requests bi-directional
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com> Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Kevin Barnett [Thu, 10 Aug 2017 18:46:45 +0000 (13:46 -0500)]
scsi: smartpqi: enhance BMIC cache flush
- distinguish between shutdown and non-shutdown.
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com> Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Kevin Barnett [Thu, 10 Aug 2017 18:46:39 +0000 (13:46 -0500)]
scsi: smartpqi: add pqi reset quiesce support
Reviewed-by: Scott Benesh <scott.benesh@microsemi.com> Signed-off-by: Kevin Barnett <kevin.barnett@microsemi.com> Signed-off-by: Don Brace <don.brace@microsemi.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Pan Bian [Tue, 8 Aug 2017 13:55:30 +0000 (21:55 +0800)]
scsi: qla2xxx: use dma_mapping_error to check map errors
The return value of dma_map_single() should be checked by
dma_mapping_error(). However, in function qla26xx_dport_diagnostics(), its
return value is checked against NULL, which could result in failures.
Signed-off-by: Pan Bian <bianpan2016@163.com> Acked-by: Himanshu Madhani <himanshu.madhani@cavium.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Pan Bian [Tue, 8 Aug 2017 12:02:51 +0000 (20:02 +0800)]
scsi: mvsas: replace kfree with scsi_host_put
The return value of scsi_host_alloc() should be released by
scsi_host_put(). However, in function mvs_pci_init(), kfree()
is used. This patch replaces kfree() with scsi_host_put() to avoid
possible memory leaks.
Signed-off-by: Pan Bian <bianpan2016@163.com> Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Pan Bian [Tue, 8 Aug 2017 11:40:30 +0000 (19:40 +0800)]
scsi: pm8001: fix double free in pm8001_pci_probe
In function pm8001_pci_probe(), on errors that the control flow jumps to
label err_out_ha_free, function pm8001_free() is called. In pm8001_free(),
scsi_host_put() is called to release shost, which keeps the return value
of scsi_host_alloc(). After pm8001_free() returns, kfree() is called to
free shost again, resulting in a double free bug. This patch removes
scsi_host_put() from pm8001_free() and explicitly calls scsi_host_put()
to release Scsi_Host in need.
Signed-off-by: Pan Bian <bianpan2016@163.com> Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Finn Thain [Fri, 4 Aug 2017 05:43:20 +0000 (01:43 -0400)]
scsi: esp_scsi: Always clear msg_out_len after MESSAGE OUT phase
After sending a message, always clear esp->msg_out_len. Otherwise,
eh_abort_handler may subsequently fail to send an ABORT TASK SET
message.
Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Finn Thain [Fri, 4 Aug 2017 05:43:20 +0000 (01:43 -0400)]
scsi: esp_scsi: Avoid sending ABORT TASK SET messages
If an LLD aborts a task set, it should complete the affected commands
with the appropriate result code. In a couple of cases esp_scsi doesn't
do so.
When the initiator receives an unhandled message, just respond by sending
a MESSAGE REJECT instead of ABORT TASK SET, and thus avoid the issue.
OTOH, a MESSAGE REJECT sent by a target can be taken as an indication
that the initiator messed up somehow. It isn't always possible to abort
correctly, so just fall back on a SCSI bus reset, which will complete the
affected commands with the appropriate result code.
For example, certain Apple (Sony) CD-ROM drives, when the non-existent
LUN 1 is scanned, can't handle the INQUIRY command. The problem is not
detected until the initiator gets a MESSAGE REJECT. Whenever esp_scsi
sees that message, it raises ATN and sends ABORT TASK SET -- but
neglects to complete the failed scmd.
The target then goes into DATA OUT phase (probably bogus), while the ESP
device goes into disconnected mode (surprising, given the bus phase).
The next Transfer Information command from esp_scsi then causes
an Invalid Command interrupt because that command is not valid when in
disconnected mode:
This patch resolves this issue because the bus reset causes the INQUIRY
command to fail earlier, and return the appropriate result code.
Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Finn Thain [Fri, 4 Aug 2017 05:43:19 +0000 (01:43 -0400)]
scsi: esp_scsi: Clean up control flow and dead code
This patch improves readability. There are no functional changes.
Since this touches on a questionable ESP_INTR_DC conditional, add some
commentary to help others who may (as I did) find themselves chasing an
"Invalid Command" error after the device flags this condition.
This cleanup also eliminates a warning from "make W=1":
drivers/scsi/esp_scsi.c: In function 'esp_finish_select':
drivers/scsi/esp_scsi.c:1233:5: warning: variable 'orig_select_state' set but not used [-Wunused-but-set-variable]
u8 orig_select_state;
Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Finn Thain [Fri, 4 Aug 2017 05:43:19 +0000 (01:43 -0400)]
scsi: mac_esp: Fix PIO transfers for MESSAGE IN phase
When in MESSAGE IN phase, the ESP device does not automatically
acknowledge each byte that is transferred by PIO. The mac_esp driver
neglects to explicitly ack them, which causes a timeout during messages
larger than one byte (e.g. tag bytes during reconnect). Fix this with an
ESP_CMD_MOK command after each byte.
The MESSAGE IN phase is also different in that each byte transferred
raises ESP_INTR_FDONE. So don't exit the transfer loop for this interrupt,
for this phase.
That resolves the "Reconnect IRQ2 timeout" error on those Macs which use
PIO transfers instead of PDMA. This patch also improves on the weak tests
for unexpected interrupts and phase changes during PIO transfers.
Tested-by: Stan Johnson <userm57@yahoo.com> Fixes: 02507a80b35e ("[PATCH] [SCSI] mac_esp: fix PIO mode, take 2") Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Bhumika Goyal [Tue, 1 Aug 2017 14:21:14 +0000 (19:51 +0530)]
arcmsr: add const to bin_attribute structures
Add const to bin_attribute structures as they are only passed to the
functions system_{remove/create}_bin_file. The arguments passed are of
type const, so declare the structures to be const.
Done using Coccinelle.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Martin Peschke [Fri, 28 Jul 2017 10:31:08 +0000 (12:31 +0200)]
scsi: zfcp: early returns for traces disabled via level
This patch adds early checks to avoid burning CPU cycles on
the assembly of trace entries which would be skipped anyway.
Introduce a static const variable to keep the trace level to check with
debug_level_enabled() in sync with the actual trace emit with
debug_event(). In order not to refactor the SAN tracing too much,
simply use a define instead.
This change is only for the non / semi hot paths,
while the actual (I/O) hot path was already improved earlier:
zfcp_dbf_scsi() is already guarded by its only caller _zfcp_dbf_scsi()
since commit dcd20e2316cd ("[SCSI] zfcp: Only collect SCSI debug data for
matching trace levels").
zfcp_dbf_hba_fsf_res() is already guarded by its only caller
zfcp_dbf_hba_fsf_response() since commit 2e261af84cdb ("[SCSI] zfcp: Only
collect FSF/HBA debug data for matching trace levels").
Signed-off-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
[maier@linux.vnet.ibm.com: rebase, reword, default level 3 branch prediction] Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Martin Peschke [Fri, 28 Jul 2017 10:31:07 +0000 (12:31 +0200)]
scsi: zfcp: clean up unnecessary module_param_named() with no_auto_port_rescan
Improves commit 43f60cbd56c4 ("[SCSI] zfcp: No automatic port_rescan on
events")
Signed-off-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
[maier@linux.vnet.ibm.com: reword, underscore in description to match sysfs] Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Martin Peschke [Fri, 28 Jul 2017 10:31:06 +0000 (12:31 +0200)]
scsi: zfcp: clean up a member of struct zfcp_qdio that was assigned but never used
v2.6.38 commit a54ca0f62f95 ("[SCSI] zfcp: Redesign of the debug tracing
for HBA records.")
dropped trace information previously introduced with
v2.6.27 commit c3baa9a26c5a ("[SCSI] zfcp: Add information about interrupt
to trace.")
but kept and needlessly assigned a now no longer used struct field.
Signed-off-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
[maier@linux.vnet.ibm.com: reword, added git history] Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: clean up no longer existent prototype from zfcp API header
Commit a54ca0f62f95 ("[SCSI] zfcp: Redesign of the debug tracing for HBA
records.") refactored zfcp_dbf_hba_berr into zfcp_dbf_hba_bit_err
but added the prototype for the latter without removing it for the former.
Suggested-by: Martin Peschke <mpeschke@linux.vnet.ibm.com> Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Martin Peschke [Fri, 28 Jul 2017 10:31:04 +0000 (12:31 +0200)]
scsi: zfcp: clean up redundant code with fall through in link down SRB switch case
Signed-off-by: Martin Peschke <mpeschke@linux.vnet.ibm.com>
[maier@linux.vnet.ibm.com: re-worded short description for more details] Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: fix kernel doc comment typos for struct zfcp_dbf_scsi
Improves commit 250a1352b95e ("[SCSI] zfcp: Redesign of the debug tracing
for SCSI records.")
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: use endianness conversions with common FC(P) struct fields
Just to silence sparse. Since zfcp only exists for s390 and
s390 is big endian, this has been working correctly without conversions
and all the new conversions are NOPs so no performance impact.
Nonetheless, use the conversion on the constant expression where possible.
NB: N_Port-IDs have always been handled with hton24 or ntoh24 conversions
because they also convert to / from character array.
Affected common code structs and .fields are:
HOT I/O PATH:
fcp_cmnd .fc_dl
FCP command: regular SCSI I/O, including DIX case
SEMI-HOT I/O PATH:
fcp_cmnd .fc_dl
recovery FCP command: task management function (LUN / target reset)
fcp_resp_ext
FCP response having FCP_SNS_LEN_VAL with .fr_rsp_len .fr_sns_len
FCP response having FCP_RESID_UNDER with .fr_resid
RECOVERY / DISCOVERY PATHS:
fc_ct_hdr .ct_cmd .ct_mr_size
zfcp auto port scan [GPN_FT] with fc_gpn_ft_resp.fp_wwpn,
recovery for returned port [GID_PN] with fc_ns_gid_pn.fn_wwpn,
get symbolic port name [GSPN],
register symbolic port name [RSPN] (NPIV only).
fc_els_rscn .rscn_plen
incoming ELS (RSCN).
fc_els_flogi .fl_wwpn .fl_wwnn
incoming ELS (PLOGI),
port open response with .fl_csp.sp_bb_data .fl_cssp[0..3].cp_class,
FCP channel physical port,
point-to-point peer (P2P only).
fc_els_logo .fl_n_port_wwn
incoming ELS (LOGO).
fc_els_adisc .adisc_wwnn .adisc_wwpn
path test after RSCN for gone target port.
Since v4.10 commit 05de97003c77 ("linux/types.h: enable endian checks for
all sparse builds"), below sparse endianness reports appear by default.
Previously, one needed to pass argument CF="-D__CHECK_ENDIAN__" to make
as in: $ make C=1 CF="-D__CHECK_ENDIAN__" M=drivers/s390/scsi.
Silenced sparse warnings and one error:
$ make C=1 M=drivers/s390/scsi
...
CHECK drivers/s390/scsi/zfcp_dbf.c
drivers/s390/scsi/zfcp_dbf.c:463:22: warning: restricted __be16 degrades to integer
drivers/s390/scsi/zfcp_dbf.c:476:28: warning: restricted __be16 degrades to integer
CC drivers/s390/scsi/zfcp_dbf.o
...
CHECK drivers/s390/scsi/zfcp_fc.c
drivers/s390/scsi/zfcp_fc.c:263:26: warning: restricted __be16 degrades to integer
drivers/s390/scsi/zfcp_fc.c:299:41: warning: incorrect type in argument 2 (different base types)
drivers/s390/scsi/zfcp_fc.c:299:41: expected unsigned long long [unsigned] [usertype] wwpn
drivers/s390/scsi/zfcp_fc.c:299:41: got restricted __be64 [usertype] fl_wwpn
drivers/s390/scsi/zfcp_fc.c:309:40: warning: incorrect type in argument 2 (different base types)
drivers/s390/scsi/zfcp_fc.c:309:40: expected unsigned long long [unsigned] [usertype] wwpn
drivers/s390/scsi/zfcp_fc.c:309:40: got restricted __be64 [usertype] fl_n_port_wwn
drivers/s390/scsi/zfcp_fc.c:338:31: warning: restricted __be16 degrades to integer
drivers/s390/scsi/zfcp_fc.c:355:24: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fc.c:355:24: expected restricted __be16 [usertype] ct_cmd
drivers/s390/scsi/zfcp_fc.c:355:24: got unsigned short [unsigned] [usertype] cmd
drivers/s390/scsi/zfcp_fc.c:356:28: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fc.c:356:28: expected restricted __be16 [usertype] ct_mr_size
drivers/s390/scsi/zfcp_fc.c:356:28: got int
drivers/s390/scsi/zfcp_fc.c:379:36: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fc.c:379:36: expected restricted __be64 [usertype] fn_wwpn
drivers/s390/scsi/zfcp_fc.c:379:36: got unsigned long long [unsigned] [usertype] wwpn
drivers/s390/scsi/zfcp_fc.c:463:18: warning: restricted __be64 degrades to integer
drivers/s390/scsi/zfcp_fc.c:465:17: warning: cast from restricted __be64
drivers/s390/scsi/zfcp_fc.c:473:20: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fc.c:473:20: expected unsigned long long [unsigned] [usertype] wwnn
drivers/s390/scsi/zfcp_fc.c:473:20: got restricted __be64 [usertype] fl_wwnn
drivers/s390/scsi/zfcp_fc.c:474:29: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fc.c:474:29: expected unsigned int [unsigned] [usertype] maxframe_size
drivers/s390/scsi/zfcp_fc.c:474:29: got restricted __be16 [usertype] sp_bb_data
drivers/s390/scsi/zfcp_fc.c:476:30: warning: restricted __be16 degrades to integer
drivers/s390/scsi/zfcp_fc.c:478:30: warning: restricted __be16 degrades to integer
drivers/s390/scsi/zfcp_fc.c:480:30: warning: restricted __be16 degrades to integer
drivers/s390/scsi/zfcp_fc.c:482:30: warning: restricted __be16 degrades to integer
drivers/s390/scsi/zfcp_fc.c:500:28: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fc.c:500:28: expected unsigned long long [unsigned] [usertype] wwnn
drivers/s390/scsi/zfcp_fc.c:500:28: got restricted __be64 [usertype] adisc_wwnn
drivers/s390/scsi/zfcp_fc.c:502:38: warning: restricted __be64 degrades to integer
drivers/s390/scsi/zfcp_fc.c:541:40: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fc.c:541:40: expected restricted __be64 [usertype] adisc_wwpn
drivers/s390/scsi/zfcp_fc.c:541:40: got unsigned long long [unsigned] [usertype] port_name
drivers/s390/scsi/zfcp_fc.c:542:40: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fc.c:542:40: expected restricted __be64 [usertype] adisc_wwnn
drivers/s390/scsi/zfcp_fc.c:542:40: got unsigned long long [unsigned] [usertype] node_name
drivers/s390/scsi/zfcp_fc.c:669:16: warning: restricted __be16 degrades to integer
drivers/s390/scsi/zfcp_fc.c:696:24: warning: restricted __be64 degrades to integer
drivers/s390/scsi/zfcp_fc.c:699:54: warning: incorrect type in argument 2 (different base types)
drivers/s390/scsi/zfcp_fc.c:699:54: expected unsigned long long [unsigned] [usertype] <noident>
drivers/s390/scsi/zfcp_fc.c:699:54: got restricted __be64 [usertype] fp_wwpn
CC drivers/s390/scsi/zfcp_fc.o
CHECK drivers/s390/scsi/zfcp_fsf.c
drivers/s390/scsi/zfcp_fsf.c:479:34: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fsf.c:479:34: expected unsigned long long [unsigned] [usertype] port_name
drivers/s390/scsi/zfcp_fsf.c:479:34: got restricted __be64 [usertype] fl_wwpn
drivers/s390/scsi/zfcp_fsf.c:480:34: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fsf.c:480:34: expected unsigned long long [unsigned] [usertype] node_name
drivers/s390/scsi/zfcp_fsf.c:480:34: got restricted __be64 [usertype] fl_wwnn
drivers/s390/scsi/zfcp_fsf.c:506:36: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fsf.c:506:36: expected unsigned long long [unsigned] [usertype] peer_wwpn
drivers/s390/scsi/zfcp_fsf.c:506:36: got restricted __be64 [usertype] fl_wwpn
drivers/s390/scsi/zfcp_fsf.c:507:36: warning: incorrect type in assignment (different base types)
drivers/s390/scsi/zfcp_fsf.c:507:36: expected unsigned long long [unsigned] [usertype] peer_wwnn
drivers/s390/scsi/zfcp_fsf.c:507:36: got restricted __be64 [usertype] fl_wwnn
drivers/s390/scsi/zfcp_fc.h:269:46: warning: restricted __be32 degrades to integer
drivers/s390/scsi/zfcp_fc.h:270:29: error: incompatible types in comparison expression (different base types)
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: use common code fcp_cmnd and fcp_resp with union in fsf_qtcb_bottom_io
This eases crash dump analysis by automatically dissecting these
protocol headers at least somewhat rather than getting a string
interpretation of large unstructured character array buffer fields.
Also, we can get rid of some unnecessary and error-prone type casts.
This change is possible since v2.6.33 commit 4318e08c84e4
("[SCSI] zfcp: Update FCP protocol related code").
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: clarify that we don't need "link" test on failed open port
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: more fitting constant for fc_ct_hdr.ct_reason on port scan response
v2.6.33 commit dbf5dfe9dbce ("[SCSI] zfcp: Use common code definitions for
FC CT structs") replaced own definitions with common code definitions.
While FC_BA_RJT_UNABLE happens to be defined with the same value 9 as
FC_FS_RJT_UNABL and thus also works, here we should use the latter from
fc_gs.h.
See also its use in libfc's fc_disc_gpn_ft_resp().
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: trace high part of "new" 64 bit SCSI LUN
Complements debugging aspects of the otherwise functionally complete
v3.17 commit 9cb78c16f5da ("scsi: use 64-bit LUNs").
While I don't have access to a target exporting 3 or 4 level LUNs,
I did test it by explicitly attaching a non-existent fake 4 level LUN
by means of zfcp sysfs attribute "unit_add".
In order to see corresponding trace records of otherwise successful
events, we had to increase the trace level of area SCSI and HBA to 6.
scsi: zfcp: trace HBA FSF response by default on dismiss or timedout late response
At the default trace level, we only trace unsuccessful events including
FSF responses.
zfcp_dbf_hba_fsf_response() only used protocol status and FSF status to
decide on an unsuccessful response. However, this is only one of multiple
possible sources determining a failed struct zfcp_fsf_req.
An FSF request can also "fail" if its response runs into an ERP timeout
or if it gets dismissed because a higher level recovery was triggered
[trace tags "erscf_1" or "erscf_2" in zfcp_erp_strategy_check_fsfreq()].
FSF requests with ERP timeout are:
FSF_QTCB_EXCHANGE_CONFIG_DATA, FSF_QTCB_EXCHANGE_PORT_DATA,
FSF_QTCB_OPEN_PORT_WITH_DID or FSF_QTCB_CLOSE_PORT or
FSF_QTCB_CLOSE_PHYSICAL_PORT for target ports,
FSF_QTCB_OPEN_LUN, FSF_QTCB_CLOSE_LUN.
One example is slow queue processing which can cause follow-on errors,
e.g. FSF_PORT_ALREADY_OPEN after FSF_QTCB_OPEN_PORT_WITH_DID timed out.
In order to see the root cause, we need to see late responses even if the
channel presented them successfully with FSF_PROT_GOOD and FSF_GOOD.
Example trace records formatted with zfcpdbf from the s390-tools package:
Timestamp : ...
Area : REC
Subarea : 00
Level : 1
Exception : -
CPU ID : ..
Caller : ...
Record ID : 1
Tag : fcegpf1
LUN : 0xffffffffffffffff
WWPN : 0x<WWPN>
D_ID : 0x00<D_ID>
Adapter status : 0x5400050b
Port status : 0x41200000
LUN status : 0x00000000
Ready count : 0x00000001
Running count : 0x...
ERP want : 0x02 ZFCP_ERP_ACTION_REOPEN_PORT
ERP need : 0x02 ZFCP_ERP_ACTION_REOPEN_PORT
|
Timestamp : ... 30 seconds later
Area : REC
Subarea : 00
Level : 1
Exception : -
CPU ID : ..
Caller : ...
Record ID : 2
Tag : erscf_2
LUN : 0xffffffffffffffff
WWPN : 0x<WWPN>
D_ID : 0x00<D_ID>
Adapter status : 0x5400050b
Port status : 0x41200000
LUN status : 0x00000000
Request ID : 0x<request_ID>
ERP status : 0x10000000 ZFCP_STATUS_ERP_TIMEDOUT
ERP step : 0x0800 ZFCP_ERP_STEP_PORT_OPENING
ERP action : 0x02 ZFCP_ERP_ACTION_REOPEN_PORT
ERP count : 0x00
|
Timestamp : ... later than previous record
Area : HBA
Subarea : 00
Level : 5 > default level => 3 <= default level
Exception : -
CPU ID : 00
Caller : ...
Record ID : 1
Tag : fs_qtcb => fs_rerr
Request ID : 0x<request_ID>
Request status : 0x00001010 ZFCP_STATUS_FSFREQ_DISMISSED
| ZFCP_STATUS_FSFREQ_CLEANUP
FSF cmnd : 0x00000005
FSF sequence no: 0x...
FSF issued : ... > 30 seconds ago
FSF stat : 0x00000000 FSF_GOOD
FSF stat qual : 00000000000000000000000000000000
Prot stat : 0x00000001 FSF_PROT_GOOD
Prot stat qual : 00000000000000000000000000000000
Port handle : 0x...
LUN handle : 0x00000000
QTCB log length: ...
QTCB log info : ...
In case of problems detecting that new responses are waiting on the input
queue, we sooner or later trigger adapter recovery due to an FSF request
timeout (trace tag "fsrth_1").
FSF requests with FSF request timeout are:
typically FSF_QTCB_ABORT_FCP_CMND; but theoretically also
FSF_QTCB_EXCHANGE_CONFIG_DATA or FSF_QTCB_EXCHANGE_PORT_DATA via sysfs,
FSF_QTCB_OPEN_PORT_WITH_DID or FSF_QTCB_CLOSE_PORT for WKA ports,
FSF_QTCB_FCP_CMND for task management function (LUN / target reset).
One or more pending requests can meanwhile have FSF_PROT_GOOD and FSF_GOOD
because the channel filled in the response via DMA into the request's QTCB.
In a theroretical case, inject code can create an erroneous FSF request
on purpose. If data router is enabled, it uses deferred error reporting.
A READ SCSI command can succeed with FSF_PROT_GOOD, FSF_GOOD, and
SAM_STAT_GOOD. But on writing the read data to host memory via DMA,
it can still fail, e.g. if an intentionally wrong scatter list does not
provide enough space. Rather than getting an unsuccessful response,
we get a QDIO activate check which in turn triggers adapter recovery.
One or more pending requests can meanwhile have FSF_PROT_GOOD and FSF_GOOD
because the channel filled in the response via DMA into the request's QTCB.
Example trace records formatted with zfcpdbf from the s390-tools package:
Timestamp : ...
Area : HBA
Subarea : 00
Level : 6 > default level => 3 <= default level
Exception : -
CPU ID : ..
Caller : ...
Record ID : 1
Tag : fs_norm => fs_rerr
Request ID : 0x<request_ID2>
Request status : 0x00001010 ZFCP_STATUS_FSFREQ_DISMISSED
| ZFCP_STATUS_FSFREQ_CLEANUP
FSF cmnd : 0x00000001
FSF sequence no: 0x...
FSF issued : ...
FSF stat : 0x00000000 FSF_GOOD
FSF stat qual : 00000000000000000000000000000000
Prot stat : 0x00000001 FSF_PROT_GOOD
Prot stat qual : ........ ........ 0000000000000000
Port handle : 0x...
LUN handle : 0x...
|
Timestamp : ...
Area : SCSI
Subarea : 00
Level : 3
Exception : -
CPU ID : ..
Caller : ...
Record ID : 1
Tag : rsl_err
Request ID : 0x<request_ID2>
SCSI ID : 0x...
SCSI LUN : 0x...
SCSI result : 0x000e0000 DID_TRANSPORT_DISRUPTED
SCSI retries : 0x00
SCSI allowed : 0x05
SCSI scribble : 0x<request_ID2>
SCSI opcode : 28... Read(10)
FCP rsp inf cod: 0x00
FCP rsp IU : 00000000000000000000000000000000
^^ SAM_STAT_GOOD 0000000000000000
Only with luck in both above cases, we could see a follow-on trace record
of an unsuccesful event following a successful but late FSF response with
FSF_PROT_GOOD and FSF_GOOD. Typically this was the case for I/O requests
resulting in a SCSI trace record "rsl_err" with DID_TRANSPORT_DISRUPTED
[On ZFCP_STATUS_FSFREQ_DISMISSED, zfcp_fsf_protstatus_eval() sets
ZFCP_STATUS_FSFREQ_ERROR seen by the request handler functions as failure].
However, the reason for this follow-on trace was invisible because the
corresponding HBA trace record was missing at the default trace level
(by default hidden records with tags "fs_norm", "fs_qtcb", or "fs_open").
On adapter recovery, after we had shut down the QDIO queues, we perform
unsuccessful pseudo completions with flag ZFCP_STATUS_FSFREQ_DISMISSED
for each pending FSF request in zfcp_fsf_req_dismiss_all().
In order to find the root cause, we need to see all pseudo responses even
if the channel presented them successfully with FSF_PROT_GOOD and FSF_GOOD.
Therefore, check zfcp_fsf_req.status for ZFCP_STATUS_FSFREQ_DISMISSED
or ZFCP_STATUS_FSFREQ_ERROR and trace with a new tag "fs_rerr".
It does not matter that there are numerous places which set
ZFCP_STATUS_FSFREQ_ERROR after the location where we trace an FSF response
early. These cases are based on protocol status != FSF_PROT_GOOD or
== FSF_PROT_FSF_STATUS_PRESENTED and are thus already traced by default
as trace tag "fs_perr" or "fs_ferr" respectively.
NB: The trace record with tag "fssrh_1" for status read buffers on dismiss
all remains. zfcp_fsf_req_complete() handles this and returns early.
All other FSF request types are handled separately and as described above.
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Fixes: 8a36e4532ea1 ("[SCSI] zfcp: enhancement of zfcp debug features") Fixes: 2e261af84cdb ("[SCSI] zfcp: Only collect FSF/HBA debug data for matching trace levels") Cc: <stable@vger.kernel.org> #2.6.38+ Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: fix payload with full FCP_RSP IU in SCSI trace records
If the FCP_RSP UI has optional parts (FCP_SNS_INFO or FCP_RSP_INFO) and
thus does not fit into the fsp_rsp field built into a SCSI trace record,
trace the full FCP_RSP UI with all optional parts as payload record
instead of just FCP_SNS_INFO as payload and
a 1 byte RSP_INFO_CODE part of FCP_RSP_INFO built into the SCSI record.
That way we would also get the full FCP_SNS_INFO in case a
target would ever send more than
min(SCSI_SENSE_BUFFERSIZE==96, ZFCP_DBF_PAY_MAX_REC==256)==96.
The mandatory part of FCP_RSP IU is only 24 bytes.
PAYload costs at least one full PAY record of 256 bytes anyway.
We cap to the hardware response size which is only FSF_FCP_RSP_SIZE==128.
So we can just put the whole FCP_RSP IU with any optional parts into
PAYload similarly as we do for SAN PAY since v4.9 commit aceeffbb59bb
("zfcp: trace full payload of all SAN records (req,resp,iels)").
This does not cause any additional trace records wasting memory.
Decoded trace records were confusing because they showed a hard-coded
sense data length of 96 even if the FCP_RSP_IU field FCP_SNS_LEN showed
actually less.
Since the same commit, we set pl_len for SAN traces to the full length of a
request/response even if we cap the corresponding trace.
In contrast, here for SCSI traces we set pl_len to the pre-computed
length of FCP_RSP IU considering SNS_LEN or RSP_LEN if valid.
Nonetheless we trace a hardcoded payload of length FSF_FCP_RSP_SIZE==128
if there were optional parts.
This makes it easier for the zfcpdbf tool to format only the relevant
part of the long FCP_RSP UI buffer. And any trailing information is still
available in the payload trace record just in case.
Rename the payload record tag from "fcp_sns" to "fcp_riu" to make the new
content explicit to zfcpdbf which can then pick a suitable field name such
as "FCP rsp IU all:" instead of "Sense info :"
Also, the same zfcpdbf can still be backwards compatible with "fcp_sns".
Old example trace record before this fix, formatted with the tool zfcpdbf
from s390-tools:
Timestamp : ...
Area : SCSI
Subarea : 00
Level : 1
Exception : -
CPU ID : ..
Caller : 0x...
Record ID : 1
Tag : lr_okay
Request ID : 0x<request_id>
SCSI ID : 0x...
SCSI LUN : 0x...
SCSI result : 0x00000000
SCSI retries : 0x00
SCSI allowed : 0x05
SCSI scribble : 0x<request_id>
SCSI opcode : <CDB of unrelated SCSI command passed to eh handler>
FCP rsp inf cod: 0x00
FCP rsp IU : 00000000000000000000010000000000 0000000000000008
FCP rsp IU len : 32
FCP rsp IU all : 00000000000000000000010000000000
^^==FCP_RSP_LEN_VALID 00000000000000080000000000000000
^^^^^^^^==FCP_RSP_LEN
^^^^^^^^^^^^^^^^^==FCP_RSP_INFO
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Fixes: 250a1352b95e ("[SCSI] zfcp: Redesign of the debug tracing for SCSI records.") Cc: <stable@vger.kernel.org> #2.6.38+ Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: fix missing trace records for early returns in TMF eh handlers
For problem determination we need to see that we were in scsi_eh
as well as whether and why we were successful or not.
The following commits introduced new early returns without adding
a trace record:
v2.6.35 commit a1dbfddd02d2
("[SCSI] zfcp: Pass return code from fc_block_scsi_eh to scsi eh")
on fc_block_scsi_eh() returning != 0 which is FAST_IO_FAIL,
v2.6.30 commit 63caf367e1c9
("[SCSI] zfcp: Improve reliability of SCSI eh handlers in zfcp")
on not having gotten an FSF request after the maximum number of retry
attempts and thus could not issue a TMF and has to return FAILED.
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Fixes: a1dbfddd02d2 ("[SCSI] zfcp: Pass return code from fc_block_scsi_eh to scsi eh") Fixes: 63caf367e1c9 ("[SCSI] zfcp: Improve reliability of SCSI eh handlers in zfcp") Cc: <stable@vger.kernel.org> #2.6.38+ Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: fix passing fsf_req to SCSI trace on TMF to correlate with HBA
Without this fix we get SCSI trace records on task management functions
which cannot be correlated to HBA trace records because all fields
related to the FSF request are empty (zero).
Also, the FCP_RSP_IU is missing as well as any sense data if available.
This was caused by v2.6.14 commit 8a36e4532ea1 ("[SCSI] zfcp: enhancement
of zfcp debug features") introducing trace records for TMFs but
hard coding NULL for a possibly existing TMF FSF request.
The scsi_cmnd scribble is also zero or unrelated for the TMF request
so it also could not lookup a suitable FSF request from there.
A broken example trace record formatted with zfcpdbf from the s390-tools
package:
Timestamp : ...
Area : SCSI
Subarea : 00
Level : 1
Exception : -
CPU ID : ..
Caller : 0x...
Record ID : 1
Tag : lr_fail
Request ID : 0x0000000000000000
^^^^^^^^^^^^^^^^ no correlation to HBA record
SCSI ID : 0x<scsitarget>
SCSI LUN : 0x<scsilun>
SCSI result : 0x000e0000
SCSI retries : 0x00
SCSI allowed : 0x05
SCSI scribble : 0x0000000000000000
SCSI opcode : 2a0000173bb800000800000000000000
FCP rsp inf cod: 0x00
^^ no TMF response
FCP rsp IU : 00000000000000000000000000000000
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 0000000000000000
^^^^^^^^^^^^^^^^^ no interesting FCP_RSP_IU
Sense len : ...
^^^^^^^^^^^^^^^^^^^^ no sense data length
Sense info : ...
^^^^^^^^^^^^^^^^^^^^ no sense data content, even if present
There are some true cases where we really do not have an FSF request:
"rsl_fai" from zfcp_dbf_scsi_fail_send() called for early
returns / completions in zfcp_scsi_queuecommand(),
"abrt_or", "abrt_bl", "abrt_ru", "abrt_ar" from
zfcp_scsi_eh_abort_handler() where we did not get as far,
"lr_nres", "tr_nres" from zfcp_task_mgmt_function() where we're
successful and do not need to do anything because adapter stopped.
For these cases it's correct to pass NULL for fsf_req to _zfcp_dbf_scsi().
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Fixes: 8a36e4532ea1 ("[SCSI] zfcp: enhancement of zfcp debug features") Cc: <stable@vger.kernel.org> #2.6.38+ Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: fix capping of unsuccessful GPN_FT SAN response trace records
v4.9 commit aceeffbb59bb ("zfcp: trace full payload of all SAN records
(req,resp,iels)") fixed trace data loss of 2.6.38 commit 2c55b750a884
("[SCSI] zfcp: Redesign of the debug tracing for SAN records.")
necessary for problem determination, e.g. to see the
currently active zone set during automatic port scan.
While it already saves space by not dumping any empty residual entries
of the large successful GPN_FT response (4 pages), there are seldom cases
where the GPN_FT response is unsuccessful and likely does not have
FC_NS_FID_LAST set in fp_flags so we did not cap the trace record.
We typically see such case for an initiator WWPN, which is not in any zone.
Cap unsuccessful responses to at least the actual basic CT_IU response
plus whatever fits the SAN trace record built-in "payload" buffer
just in case there's trailing information
of which we would at least see the existence and its beginning.
In order not to erroneously cap successful responses, we need to swap
calling the trace function and setting the CT / ELS status to success (0).
The fix saves all but one of the previously associated 64 PAYload trace
record chunks of size 256 bytes each.
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Fixes: aceeffbb59bb ("zfcp: trace full payload of all SAN records (req,resp,iels)") Fixes: 2c55b750a884 ("[SCSI] zfcp: Redesign of the debug tracing for SAN records.") Cc: <stable@vger.kernel.org> #2.6.38+ Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Benjamin Block [Fri, 28 Jul 2017 10:30:52 +0000 (12:30 +0200)]
scsi: zfcp: add handling for FCP_RESID_OVER to the fcp ingress path
Up until now zfcp would just ignore the FCP_RESID_OVER flag in the FCP
response IU. When this flag is set, it is possible, in regards to the
FCP standard, that the storage-server processes the command normally, up
to the point where data is missing and simply ignores those.
In this case no CHECK CONDITION would be set, and because we ignored the
FCP_RESID_OVER flag we resulted in at least a data loss or even
-corruption as a follow-up error, depending on how the
applications/layers on top behave. To prevent this, we now set the
host-byte of the corresponding scsi_cmnd to DID_ERROR.
Other storage-behaviors, where the same condition results in a CHECK
CONDITION set in the answer, don't need to be changed as they are
handled in the mid-layer already.
Following is an example trace record decoded with zfcpdbf from the
s390-tools package. We forcefully injected a fc_dl which is one byte too
small:
Timestamp : ...
Area : SCSI
Subarea : 00
Level : 3
Exception : -
CPU ID : ..
Caller : 0x...
Record ID : 1
Tag : rsl_err
Request ID : 0x...
SCSI ID : 0x...
SCSI LUN : 0x...
SCSI result : 0x00070000
^^DID_ERROR
SCSI retries : 0x..
SCSI allowed : 0x..
SCSI scribble : 0x...
SCSI opcode : 2a000000000000000800000000000000
FCP rsp inf cod: 0x00
FCP rsp IU : 00000000000000000000040000000001
^^fr_flags==FCP_RESID_OVER
^^fr_status==SAM_STAT_GOOD
^^^^^^^^fr_resid 0000000000000000
As of now, we don't actively handle to possibility that a response IU
has both flags - FCP_RESID_OVER and FCP_RESID_UNDER - set at once.
Reported-by: Luke M. Hopkins <lmhopkin@us.ibm.com> Reviewed-by: Steffen Maier <maier@linux.vnet.ibm.com> Fixes: 553448f6c483 ("[SCSI] zfcp: Message cleanup") Fixes: ea127f975424 ("[PATCH] s390 (7/7): zfcp host adapter.") (tglx/history.git) Cc: <stable@vger.kernel.org> #2.6.33+ Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: fix queuecommand for scsi_eh commands when DIX enabled
Since commit db007fc5e20c ("[SCSI] Command protection operation"),
scsi_eh_prep_cmnd() saves scmd->prot_op and temporarily resets it to
SCSI_PROT_NORMAL.
Other FCP LLDDs such as qla2xxx and lpfc shield their queuecommand()
to only access any of scsi_prot_sg...() if
(scsi_get_prot_op(cmd) != SCSI_PROT_NORMAL).
Do the same thing for zfcp, which introduced DIX support with
commit ef3eb71d8ba4 ("[SCSI] zfcp: Introduce experimental support for
DIF/DIX").
Otherwise, TUR SCSI commands as part of scsi_eh likely fail in zfcp,
because the regular SCSI command with DIX protection data, that scsi_eh
re-uses in scsi_send_eh_cmnd(), of course still has
(scsi_prot_sg_count() != 0) and so zfcp sends down bogus requests to the
FCP channel hardware.
This causes scsi_eh_test_devices() to have (finish_cmds == 0)
[not SCSI device is online or not scsi_eh_tur() failed]
so regular SCSI commands, that caused / were affected by scsi_eh,
are moved to work_q and scsi_eh_test_devices() itself returns false.
In turn, it unnecessarily escalates in our case in scsi_eh_ready_devs()
beyond host reset to finally scsi_eh_offline_sdevs()
which sets affected SCSI devices offline with the following kernel message:
"kernel: sd H:0:T:L: Device offlined - not ready after error recovery"
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Fixes: ef3eb71d8ba4 ("[SCSI] zfcp: Introduce experimental support for DIF/DIX") Cc: <stable@vger.kernel.org> #2.6.36+ Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: zfcp: Remove unneeded linux/miscdevice.h include
drivers/s390/scsi/zfcp_aux.c does not contain any miscdevice so the
inclusion of linux/miscdevice.h is unnecessary.
[maier@linux.vnet.ibm.com: just for the records, this is in fact a
minor missing code cleanup of the following older "feature"
which also dropped the only former use of a misc device in zfcp:
commit 663e0890e31c ("[SCSI] zfcp: remove access control tables
interface")
commit b5dc3c4800cc ("[SCSI] zfcp: remove access control tables
interface (keep sysfs files)")
commit 1b33ef23946a ("zfcp: remove access control tables interface
(port leftovers)")]
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Michał Mirosław [Thu, 3 Aug 2017 23:28:09 +0000 (01:28 +0200)]
scsi: aic7xxx: regenerate firmware files
Regenerate firmware files to make cleaner base for following fix.
This removes some unused definitions and reorders some #defines, but
the code remains the same.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Michał Mirosław [Thu, 3 Aug 2017 23:28:08 +0000 (01:28 +0200)]
scsi: aic7xxx: fix firmware build deps
We need to override Kbuild rules for copying shipped files, otherwise
aic7xxx_reg.h and aic7xxx_reg_print.c will be ovewritten by old versions.
Fixes: 516b7db593f3a541e2e98867575c3c697f41a247 Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Michał Mirosław [Thu, 3 Aug 2017 23:28:07 +0000 (01:28 +0200)]
scsi: aic7xxx: remove empty function
ahc_platform_dump_card_state() does nothing. Remove it.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Benjamin Block [Fri, 28 Jul 2017 10:29:43 +0000 (12:29 +0200)]
MAINTAINERS: Add myself to S390 ZFCP DRIVER as a co-maintainer
I have been working with Steffen on zFCP for quite a while now and we
decided adding me as a co-maintainer might be a good thing.
Acked-by: Steffen Maier <maier@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
scsi: fc: start decoupling fc_block_scsi_eh from scsi_cmnd
Scsi_cmnd is an unsuitable argument for eh_device_reset_handler(),
eh_target_reset_handler(), and eh_host_reset_handler() which do not have
the scope of one single SCSI command. These callbacks tend to use
fc_block_scsi_eh() requiring scsi_cmnd. In order to start decoupling
above eh callbacks from scsi_cmnd, introduce a new variant of the
function called fc_block_rport() taking an fc_rport as argument.
Refactor the old fc_block_scsi_eh() to simply delegate to
fc_block_rport().
Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Reviewed-by: Hannes Reinecke <hare@suse.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>