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@xxxxxxxxxx>
Reviewed-by: Christoph Hellwig <hch@xxxxxx>
---
drivers/scsi/sd.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c
index 34fb0f8d189e..da7afeecbf17 100644
--- a/drivers/scsi/sd.c
+++ b/drivers/scsi/sd.c
@@ -155,7 +155,7 @@ cache_type_store(struct device *dev, struct device_attribute *attr,
struct scsi_mode_data data;
struct scsi_sense_hdr sshdr;
static const char temp[] = "temporary ";
- int len;
+ int len, ret;
if (sdp->type != TYPE_DISK && sdp->type != TYPE_ZBC)
/* no cache control on RBC devices; theoretically they
@@ -202,9 +202,10 @@ cache_type_store(struct device *dev, struct device_attribute *attr,
*/
data.device_specific = 0;
- if (scsi_mode_select(sdp, 1, sp, buffer_data, len, SD_TIMEOUT,
- sdkp->max_retries, &data, &sshdr)) {
- if (scsi_sense_valid(&sshdr))
+ ret = scsi_mode_select(sdp, 1, sp, buffer_data, len, SD_TIMEOUT,
+ sdkp->max_retries, &data, &sshdr);
+ if (ret) {
+ if (ret > 0 && scsi_sense_valid(&sshdr))
sd_print_sense_hdr(sdkp, &sshdr);
return -EINVAL;
}
--
2.34.1
