diff mbox series

[v2,09/12] scsi: Fix sshdr use in scsi_test_unit_ready

Message ID 20231004210013.5601-10-michael.christie@oracle.com
State Superseded
Headers show
Series scsi: sshdr and retry fixes | expand

Commit Message

Mike Christie Oct. 4, 2023, 9 p.m. UTC 
If scsi_execute_cmd returns < 0, it doesn't initialize the sshdr, so we
shouldn't access the sshdr. If it returns 0, then the cmd executed
successfully, so there is no need to check the sshdr. This has us access
the sshdr when we get a return value > 0.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: Martin Wilck <mwilck@suse.com>
---
 drivers/scsi/scsi_lib.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index c2f647a7c1b0..195ca80667d0 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -2299,10 +2299,10 @@  scsi_test_unit_ready(struct scsi_device *sdev, int timeout, int retries,
 	do {
 		result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, NULL, 0,
 					  timeout, 1, &exec_args);
-		if (sdev->removable && scsi_sense_valid(sshdr) &&
+		if (sdev->removable && result > 0 && scsi_sense_valid(sshdr) &&
 		    sshdr->sense_key == UNIT_ATTENTION)
 			sdev->changed = 1;
-	} while (scsi_sense_valid(sshdr) &&
+	} while (result > 0 && scsi_sense_valid(sshdr) &&
 		 sshdr->sense_key == UNIT_ATTENTION && --retries);
 
 	return result;