linux-kernel - [PATCH 4.11 064/115] ibmvscsis: Clear left-over abort

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Date:   Mon,  5 Jun 2017 18:17:37 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        "Bryant G. Ly" <bryantly@...ux.vnet.ibm.com>,
        Michael Cyr <mikecyr@...ux.vnet.ibm.com>,
        Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH 4.11 064/115] ibmvscsis: Clear left-over abort_cmd pointers

4.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Bryant G. Ly <bryantly@...ux.vnet.ibm.com>

commit 98883f1b5415ea9dce60d5178877d15f4faa10b8 upstream.

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().

Signed-off-by: Bryant G. Ly <bryantly@...ux.vnet.ibm.com>
Reviewed-by: Michael Cyr <mikecyr@...ux.vnet.ibm.com>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c |    3 +++
 1 file changed, 3 insertions(+)

--- 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_g
 		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(stru
 				if (cmd->abort_cmd) {
 					retry = true;
 					cmd->abort_cmd->flags &= ~(DELAY_SEND);
+					cmd->abort_cmd = NULL;
 				}

 				/*