Patch Upstream: IB/srp: Avoid sending a task management function needlessly

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commit: 3780d1f08856f692116bcf026e4acf1c521df1c7
From: Bart Van Assche <bvanassche@xxxxxxx>
Date: Thu, 21 Feb 2013 17:18:00 +0000
Subject: IB/srp: Avoid sending a task management function needlessly

Do not send a task management function if sending will fail anyway
because either there is no RDMA/RC connection or the QP is in the
error state.

Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
Acked-by: David Dillow <dave@xxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx> # 3.8
Signed-off-by: Roland Dreier <roland@xxxxxxxxxxxxxxx>
---
 drivers/infiniband/ulp/srp/ib_srp.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/infiniband/ulp/srp/ib_srp.c b/drivers/infiniband/ulp/srp/ib_srp.c
index 94f76b9..2633258 100644
--- a/drivers/infiniband/ulp/srp/ib_srp.c
+++ b/drivers/infiniband/ulp/srp/ib_srp.c
@@ -1695,6 +1695,9 @@ static int srp_send_tsk_mgmt(struct srp_target_port *target,
 	struct srp_iu *iu;
 	struct srp_tsk_mgmt *tsk_mgmt;
 
+	if (!target->connected || target->qp_in_error)
+		return -1;
+
 	init_completion(&target->tsk_mgmt_done);
 
 	spin_lock_irq(&target->lock);
@@ -1754,8 +1757,6 @@ static int srp_reset_device(struct scsi_cmnd *scmnd)
 
 	shost_printk(KERN_ERR, target->scsi_host, "SRP reset_device called\n");
 
-	if (target->qp_in_error)
-		return FAILED;
 	if (srp_send_tsk_mgmt(target, SRP_TAG_NO_REQ, scmnd->device->lun,
 			      SRP_TSK_LUN_RESET))
 		return FAILED;
-- 
1.7.10.4
--
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