scsi: hpsa: use bus '3' for legacy HBA devices

Older controllers use SCSI target id '0' for the first internal disk. As
the controllers are now placed on the same bus as the internal disks
this leads to a clash with the SCSI target id of controller.  This patch
checks the SCSI revision, and moves older controller to bus '3' to be
compatible with older releases and avoid this problem.

[mkp: fixed uninitialized variable]

Fixes: 09371d623c9 ("hpsa: Change SAS transport devices to bus 0.")
Cc: <stable@vger.kernel.org> # v4.5+
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>

diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index d007ec18179af9789a12e6ca7c9f5878374dc593..a1d6ab76a51418f9a4f26ecbb76529ea1b775835 100644 (file)
--- a/drivers/scsi/hpsa.c
+++ b/drivers/scsi/hpsa.c
@@ -2009,7 +2009,7 @@ static struct hpsa_scsi_dev_t *lookup_hpsa_scsi_dev(struct ctlr_info *h,
 
 static int hpsa_slave_alloc(struct scsi_device *sdev)
 {
-       struct hpsa_scsi_dev_t *sd;
+       struct hpsa_scsi_dev_t *sd = NULL;
        unsigned long flags;
        struct ctlr_info *h;
 
@@ -2026,7 +2026,8 @@ static int hpsa_slave_alloc(struct scsi_device *sdev)
                        sd->target = sdev_id(sdev);
                        sd->lun = sdev->lun;
                }
-       } else
+       }
+       if (!sd)
                sd = lookup_hpsa_scsi_dev(h, sdev_channel(sdev),
                                        sdev_id(sdev), sdev->lun);
 
@@ -3840,6 +3841,7 @@ static int hpsa_update_device_info(struct ctlr_info *h,
                sizeof(this_device->vendor));
        memcpy(this_device->model, &inq_buff[16],
                sizeof(this_device->model));
+       this_device->rev = inq_buff[2];
        memset(this_device->device_id, 0,
                sizeof(this_device->device_id));
        if (hpsa_get_device_id(h, scsi3addr, this_device->device_id, 8,
@@ -3929,10 +3931,14 @@ static void figure_bus_target_lun(struct ctlr_info *h,
 
        if (!is_logical_dev_addr_mode(lunaddrbytes)) {
                /* physical device, target and lun filled in later */
-               if (is_hba_lunid(lunaddrbytes))
+               if (is_hba_lunid(lunaddrbytes)) {
+                       int bus = HPSA_HBA_BUS;
+
+                       if (!device->rev)
+                               bus = HPSA_LEGACY_HBA_BUS;
                        hpsa_set_bus_target_lun(device,
-                                       HPSA_HBA_BUS, 0, lunid & 0x3fff);
-               else
+                                       bus, 0, lunid & 0x3fff);
+               } else
                        /* defer target, lun assignment for physical devices */
                        hpsa_set_bus_target_lun(device,
                                        HPSA_PHYSICAL_DEVICE_BUS, -1, -1);

diff --git a/drivers/scsi/hpsa.h b/drivers/scsi/hpsa.h
index 82cdfad874f3aa363d4989837d2b9455c8e0acdb..9ea162de80dcfa976b737cf209c4570de6003888 100644 (file)
--- a/drivers/scsi/hpsa.h
+++ b/drivers/scsi/hpsa.h
@@ -69,6 +69,7 @@ struct hpsa_scsi_dev_t {
        u64 sas_address;
        unsigned char vendor[8];        /* bytes 8-15 of inquiry data */
        unsigned char model[16];        /* bytes 16-31 of inquiry data */
+       unsigned char rev;              /* byte 2 of inquiry data */
        unsigned char raid_level;       /* from inquiry page 0xC1 */
        unsigned char volume_offline;   /* discovered via TUR or VPD */
        u16 queue_depth;                /* max queue_depth for this device */
@@ -402,6 +403,7 @@ struct offline_device_entry {
 #define HPSA_RAID_VOLUME_BUS           1
 #define HPSA_EXTERNAL_RAID_VOLUME_BUS  2
 #define HPSA_HBA_BUS                   0
+#define HPSA_LEGACY_HBA_BUS            3
 
 /*
        Send the command to the hardware