diff mbox series

[v10,15/33] scsi: spi: Fix sshdr use

Message ID 20230714213419.95492-16-michael.christie@oracle.com
State Superseded
Headers show
Series scsi: Allow scsi_execute users to control retries | expand

Commit Message

Mike Christie July 14, 2023, 9:34 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 get a return value > 0.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
---
 drivers/scsi/scsi_transport_spi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

John Garry July 18, 2023, 4:53 p.m. UTC | #1 
On 14/07/2023 22:34, 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 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>
diff mbox series

Patch

diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 2442d4d2e3f3..f668c1c0a98f 100644
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -676,10 +676,10 @@  spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer,
 	for (r = 0; r < retries; r++) {
 		result = spi_execute(sdev, spi_write_buffer, REQ_OP_DRV_OUT,
 				     buffer, len, &sshdr);
-		if(result || !scsi_device_online(sdev)) {
+		if (result || !scsi_device_online(sdev)) {
 
 			scsi_device_set_state(sdev, SDEV_QUIESCE);
-			if (scsi_sense_valid(&sshdr)
+			if (result > 0 && scsi_sense_valid(&sshdr)
 			    && sshdr.sense_key == ILLEGAL_REQUEST
 			    /* INVALID FIELD IN CDB */
 			    && sshdr.asc == 0x24 && sshdr.ascq == 0x00)