[PATCH 3/4] ibmvscsis: Clear left-over abort_cmd pointers

[Manoj Iyer]

From: "Bryant G. Ly" <bryantly at linux.vnet.ibm.com>

With the addition of ibmvscsis->abort_cmd pointer within
commit 25e78531268e ("ibmvscsis: Do not send aborted task response"),
make sure to explicitly NULL these pointers when clearing
DELAY_SEND flag.

Do this for two cases, when getting the new new ibmvscsis
descriptor in ibmvscsis_get_free_cmd() and before posting
the response completion in ibmvscsis_send_messages().

BugLink: https://launchpad.net/bugs/1689365

Signed-off-by: Bryant G. Ly <bryantly at linux.vnet.ibm.com>
Reviewed-by: Michael Cyr <mikecyr at linux.vnet.ibm.com>
Cc: <stable at vger.kernel.org> # v4.8+
Signed-off-by: Nicholas Bellinger <nab at linux-iscsi.org>
(cherry picked from commit 98883f1b5415ea9dce60d5178877d15f4faa10b8)
Signed-off-by: Manoj Iyer <manoj.iyer at canonical.com>
---
 drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
index d390325c99ec..ee64241865e6 100644
--- a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
+++ b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
@@ -1170,6 +1170,8 @@ static struct ibmvscsis_cmd *ibmvscsis_get_free_cmd(struct scsi_info *vscsi)
 		cmd = list_first_entry_or_null(&vscsi->free_cmd,
 					       struct ibmvscsis_cmd, list);
 		if (cmd) {
+			if (cmd->abort_cmd)
+				cmd->abort_cmd = NULL;
 			cmd->flags &= ~(DELAY_SEND);
 			list_del(&cmd->list);
 			cmd->iue = iue;
@@ -1774,6 +1776,7 @@ static void ibmvscsis_send_messages(struct scsi_info *vscsi)
 				if (cmd->abort_cmd) {
 					retry = true;
 					cmd->abort_cmd->flags &= ~(DELAY_SEND);
+					cmd->abort_cmd = NULL;
 				}
 
 				/*
-- 
2.11.0