diff mbox series

[v11,09/34] scsi: sd: Fix sshdr use in sd_spinup_disk

Message ID 20230905231547.83945-10-michael.christie@oracle.com
State Superseded
Headers show
Series [v11,01/34] scsi: Add helper to prep sense during error handling | expand

Commit Message

Mike Christie Sept. 5, 2023, 11:15 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: Bart Van Assche <bvanassche@acm.org>
---
 drivers/scsi/sd.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)

Comments

Martin Wilck Sept. 15, 2023, 8:27 p.m. UTC | #1 
On Tue, 2023-09-05 at 18:15 -0500, Mike Christie wrote:
> 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: Bart Van Assche <bvanassche@acm.org>
Reviewed-by: Martin Wilck <mwilck@suse.com>
diff mbox series

Patch

diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 3aac3041c83f..74967e1b19da 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -2180,19 +2180,21 @@  sd_spinup_disk(struct scsi_disk *sdkp)
 						      sdkp->max_retries,
 						      &exec_args);
 
-			/*
-			 * If the drive has indicated to us that it
-			 * doesn't have any media in it, don't bother
-			 * with any more polling.
-			 */
-			if (media_not_present(sdkp, &sshdr)) {
-				if (media_was_present)
-					sd_printk(KERN_NOTICE, sdkp, "Media removed, stopped polling\n");
-				return;
-			}
+			if (the_result > 0) {
+				/*
+				 * If the drive has indicated to us that it
+				 * doesn't have any media in it, don't bother
+				 * with any more polling.
+				 */
+				if (media_not_present(sdkp, &sshdr)) {
+					if (media_was_present)
+						sd_printk(KERN_NOTICE, sdkp,
+							  "Media removed, stopped polling\n");
+					return;
+				}
 
-			if (the_result)
 				sense_valid = scsi_sense_valid(&sshdr);
+			}
 			retries++;
 		} while (retries < 3 &&
 			 (!scsi_status_is_good(the_result) ||