ibmvscsis: Clear left-over abort_cmd pointers

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@linux.vnet.ibm.com>
Reviewed-by: Michael Cyr <mikecyr@linux.vnet.ibm.com>
Cc: <stable@vger.kernel.org> # v4.8+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
(cherry picked from commit 98883f1b5415ea9dce60d5178877d15f4faa10b8)
Signed-off-by: Manoj Iyer <manoj.iyer@canonical.com>
Acked-by: Stefan Bader <stefan.bader@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

diff --git a/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c b/drivers/scsi/ibmvscsi_tgt/ibmvscsi_tgt.c
index d390325c99ecf9487c9b4441fd0e25aec05378c7..ee64241865e6183d6dd340cf75d10740152e83a7 100644 (file)
--- 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;
                                }
 
                                /*