diff mbox series

[v8,11/33] scsi: hp_sw: Only access sshdr if res > 0

Message ID 20230614071719.6372-12-michael.christie@oracle.com (mailing list archive)
State Changes Requested
Headers show
Series scsi: Allow scsi_execute users to control retries | expand

Commit Message

Mike Christie June 14, 2023, 7:16 a.m. UTC 
If res < 0, scsi_execute_cmd will not have set the sshdr, so we can't
access it.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
---
 drivers/scsi/device_handler/scsi_dh_hp_sw.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Christoph Hellwig June 14, 2023, 7:26 a.m. UTC | #1 
Looks good:

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
index 5f2f943d926c..785ab2c5391f 100644
--- a/drivers/scsi/device_handler/scsi_dh_hp_sw.c
+++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
@@ -93,7 +93,7 @@  static int hp_sw_tur(struct scsi_device *sdev, struct hp_sw_dh_data *h)
 	res = scsi_execute_cmd(sdev, cmd, opf, NULL, 0, HP_SW_TIMEOUT,
 			       HP_SW_RETRIES, &exec_args);
 	if (res) {
-		if (scsi_sense_valid(&sshdr))
+		if (res > 0 && scsi_sense_valid(&sshdr))
 			ret = tur_done(sdev, h, &sshdr);
 		else {
 			sdev_printk(KERN_WARNING, sdev,
@@ -134,7 +134,7 @@  static int hp_sw_start_stop(struct hp_sw_dh_data *h)
 	res = scsi_execute_cmd(sdev, cmd, opf, NULL, 0, HP_SW_TIMEOUT,
 			       HP_SW_RETRIES, &exec_args);
 	if (res) {
-		if (!scsi_sense_valid(&sshdr)) {
+		if (res < 0 || !scsi_sense_valid(&sshdr)) {
 			sdev_printk(KERN_WARNING, sdev,
 				    "%s: sending start_stop_unit failed, "
 				    "no sense available\n", HP_SW_NAME);