diff options
| author | Tomas Winkler <tomas.winkler@intel.com> | 2015-07-28 16:54:24 +0300 |
|---|---|---|
| committer | James Bottomley <JBottomley@Odin.com> | 2015-09-06 21:02:04 +0300 |
| commit | 299b6c07ea134d4f9d7cb743194bf9c1941585b2 (patch) | |
| tree | 6dba140b43880bfc7bab2f8cde58ba2a62134336 /drivers/scsi/scsi_debug.c | |
| parent | 58a8635d5a1b49c4b87fb48969319e1ce77d3f03 (diff) | |
| download | linux-299b6c07ea134d4f9d7cb743194bf9c1941585b2.tar.xz | |
scsi_debug: schedule_resp fix input variable check
The function should never be called with cmnd NULL so
put a fat WARN there.
Fix also smatch wraning:
schedule_resp() warn: variable dereferenced before check 'cmnd'
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: James Bottomley <JBottomley@Odin.com>
Diffstat (limited to 'drivers/scsi/scsi_debug.c')
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 3a70683cf9f9..faa4ddd8decf 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -3941,13 +3941,20 @@ schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, unsigned long iflags; int k, num_in_q, qdepth, inject; struct sdebug_queued_cmd *sqcp = NULL; - struct scsi_device *sdp = cmnd->device; + struct scsi_device *sdp; + + /* this should never happen */ + if (WARN_ON(!cmnd)) + return SCSI_MLQUEUE_HOST_BUSY; - if (NULL == cmnd || NULL == devip) { - pr_warn("called with NULL cmnd or devip pointer\n"); + if (NULL == devip) { + pr_warn("called devip == NULL\n"); /* no particularly good error to report back */ return SCSI_MLQUEUE_HOST_BUSY; } + + sdp = cmnd->device; + if ((scsi_result) && (SCSI_DEBUG_OPT_NOISE & scsi_debug_opts)) sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", __func__, scsi_result); |