[PATCH v5 08/13] scsi: scsi_dh_hp_sw: need to check the result of scsi_execute in hp_sw_tur,hp_sw_start_stop

[zhengbin]

Like sd_pr_command, before use sshdr, we need to check the result
of scsi_execute.

Signed-off-by: zhengbin <zhengbi...@huawei.com>
---
 drivers/scsi/device_handler/scsi_dh_hp_sw.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/device_handler/scsi_dh_hp_sw.c 
b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
index 8acd4bb..be8c139 100644
--- a/drivers/scsi/device_handler/scsi_dh_hp_sw.c
+++ b/drivers/scsi/device_handler/scsi_dh_hp_sw.c
@@ -90,7 +90,8 @@ static int hp_sw_tur(struct scsi_device *sdev, struct 
hp_sw_dh_data *h)
        res = scsi_execute(sdev, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
                        HP_SW_TIMEOUT, HP_SW_RETRIES, req_flags, 0, NULL);
        if (res) {
-               if (scsi_sense_valid(&sshdr))
+               if (driver_byte(res) == DRIVER_SENSE &&
+                   scsi_sense_valid(&sshdr))
                        ret = tur_done(sdev, h, &sshdr);
                else {
                        sdev_printk(KERN_WARNING, sdev,
@@ -128,7 +129,8 @@ static int hp_sw_start_stop(struct hp_sw_dh_data *h)
        res = scsi_execute(sdev, cmd, DMA_NONE, NULL, 0, NULL, &sshdr,
                        HP_SW_TIMEOUT, HP_SW_RETRIES, req_flags, 0, NULL);
        if (res) {
-               if (!scsi_sense_valid(&sshdr)) {
+               if (driver_byte(result) != DRIVER_SENSE ||
+                   !scsi_sense_valid(&sshdr)) {
                        sdev_printk(KERN_WARNING, sdev,
                                    "%s: sending start_stop_unit failed, "
                                    "no sense available\n", HP_SW_NAME);
--
2.7.4