Like sd_pr_command, before use sshdr, we need to check the result
of scsi_execute.
Signed-off-by: zhengbin <zhengbin13@xxxxxxxxxx>
---
drivers/scsi/scsi_lib.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 5447738..2970190 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2216,6 +2216,9 @@ scsi_test_unit_ready(struct scsi_device *sdev, int timeout, int retries,
do {
result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0, sshdr,
timeout, 1, NULL);
+ if (driver_byte(result) != DRIVER_SENSE)
+ break;
+
if (sdev->removable && scsi_sense_valid(sshdr) &&
sshdr->sense_key == UNIT_ATTENTION)
sdev->changed = 1;
--
2.7.4
