scsi: spi: Fix sshdr use

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>
Link: https://lore.kernel.org/r/20231004210013.5601-7-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>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

diff --git a/drivers/scsi/scsi_transport_spi.c b/drivers/scsi/scsi_transport_spi.c
index 2442d4d..f668c1c 100644 (file)
--- 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)