From: Chad Dupuis <chad.dupuis@qlogic.com>
Date: Fri, 8 Feb 2013 06:57:50 +0000 (-0500)
Subject: [SCSI] qla2xxx: Unload hangs after issuing BSG commands to vport.
X-Git-Tag: v3.9-rc1~21^2~42
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=b00ee7d770abbe1e63df74eada0376c75ceb2daf;p=linux.git

[SCSI] qla2xxx: Unload hangs after issuing BSG commands to vport.

BSG code path increments ref count in the send path, but does not
decrement in the return path leading to hang during unload of the
driver.

Signed-off-by: Chad Dupuis <chad.dupuis@qlogic.com>
Signed-off-by: Saurav Kashyap <saurav.kashyap@qlogic.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

diff --git a/drivers/scsi/qla2xxx/qla_bsg.c b/drivers/scsi/qla2xxx/qla_bsg.c
index 525c339436ab..79babab8353f 100644
--- a/drivers/scsi/qla2xxx/qla_bsg.c
+++ b/drivers/scsi/qla2xxx/qla_bsg.c
@@ -27,7 +27,7 @@ void
 qla2x00_bsg_sp_free(void *data, void *ptr)
 {
 	srb_t *sp = (srb_t *)ptr;
-	struct scsi_qla_host *vha = (scsi_qla_host_t *)data;
+	struct scsi_qla_host *vha = sp->fcport->vha;
 	struct fc_bsg_job *bsg_job = sp->u.bsg_job;
 	struct qla_hw_data *ha = vha->hw;
 
@@ -40,7 +40,7 @@ qla2x00_bsg_sp_free(void *data, void *ptr)
 	if (sp->type == SRB_CT_CMD ||
 	    sp->type == SRB_ELS_CMD_HST)
 		kfree(sp->fcport);
-	mempool_free(sp, vha->hw->srb_mempool);
+	qla2x00_rel_sp(vha, sp);
 }
 
 int
@@ -368,7 +368,7 @@ qla2x00_process_els(struct fc_bsg_job *bsg_job)
 	if (rval != QLA_SUCCESS) {
 		ql_log(ql_log_warn, vha, 0x700e,
 		    "qla2x00_start_sp failed = %d\n", rval);
-		mempool_free(sp, ha->srb_mempool);
+		qla2x00_rel_sp(vha, sp);
 		rval = -EIO;
 		goto done_unmap_sg;
 	}
@@ -515,7 +515,7 @@ qla2x00_process_ct(struct fc_bsg_job *bsg_job)
 	if (rval != QLA_SUCCESS) {
 		ql_log(ql_log_warn, vha, 0x7017,
 		    "qla2x00_start_sp failed=%d.\n", rval);
-		mempool_free(sp, ha->srb_mempool);
+		qla2x00_rel_sp(vha, sp);
 		rval = -EIO;
 		goto done_free_fcport;
 	}
@@ -1995,6 +1995,6 @@ qla24xx_bsg_timeout(struct fc_bsg_job *bsg_job)
 	spin_unlock_irqrestore(&ha->hardware_lock, flags);
 	if (bsg_job->request->msgcode == FC_BSG_HST_CT)
 		kfree(sp->fcport);
-	mempool_free(sp, ha->srb_mempool);
+	qla2x00_rel_sp(vha, sp);
 	return 0;
 }
diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 97f268433b9f..7568324d86a6 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -70,9 +70,7 @@ qla2x00_sp_free(void *data, void *ptr)
 	struct scsi_qla_host *vha = (scsi_qla_host_t *)data;
 
 	del_timer(&iocb->timer);
-	mempool_free(sp, vha->hw->srb_mempool);
-
-	QLA_VHA_MARK_NOT_BUSY(vha);
+	qla2x00_rel_sp(vha, sp);
 }
 
 /* Asynchronous Login/Logout Routines -------------------------------------- */
diff --git a/drivers/scsi/qla2xxx/qla_inline.h b/drivers/scsi/qla2xxx/qla_inline.h
index deb8618d1b81..130f6f3c2a97 100644
--- a/drivers/scsi/qla2xxx/qla_inline.h
+++ b/drivers/scsi/qla2xxx/qla_inline.h
@@ -197,6 +197,13 @@ qla2x00_get_sp(scsi_qla_host_t *vha, fc_port_t *fcport, gfp_t flag)
 	return sp;
 }
 
+static inline void
+qla2x00_rel_sp(scsi_qla_host_t *vha, srb_t *sp)
+{
+	mempool_free(sp, vha->hw->srb_mempool);
+	QLA_VHA_MARK_NOT_BUSY(vha);
+}
+
 static inline void
 qla2x00_init_timer(srb_t *sp, unsigned long tmo)
 {
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 9e3ae1d8de51..33fb2178eb4d 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -630,7 +630,7 @@ qla2x00_sp_free_dma(void *vha, void *ptr)
 	}
 
 	CMD_SP(cmd) = NULL;
-	mempool_free(sp, ha->srb_mempool);
+	qla2x00_rel_sp(sp->fcport->vha, sp);
 }
 
 static void
@@ -718,7 +718,7 @@ qla2xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd)
 		goto qc24_target_busy;
 	}
 
-	sp = qla2x00_get_sp(base_vha, fcport, GFP_ATOMIC);
+	sp = qla2x00_get_sp(vha, fcport, GFP_ATOMIC);
 	if (!sp) {
 		set_bit(HOST_RAMP_DOWN_QUEUE_DEPTH, &vha->dpc_flags);
 		goto qc24_host_busy;