aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi/sg.c
diff options
context:
space:
mode:
authorJohannes Thumshirn <jthumshirn@suse.de>2017-07-17 15:11:42 +0200
committerMartin K. Petersen <martin.petersen@oracle.com>2017-07-17 23:03:48 -0400
commit14074aba4bcda3764c9a702b276308b89901d5b6 (patch)
treee5ecc2155d58096e0b960287b13c1a3d1472bafd /drivers/scsi/sg.c
parenteeee4107546ef24c739d72645899e50fa693e9ff (diff)
scsi: sg: fix static checker warning in sg_is_valid_dxfer
dxfer_len is an unsigned int and we always assign a value > 0 to it, so it doesn't make any sense to check if it is < 0. We can't really check dxferp as well as we have both NULL and not NULL cases in the possible call paths. So just return true for SG_DXFER_FROM_DEV transfer in sg_is_valid_dxfer(). Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de> Reported-by: Colin Ian King <colin.king@canonical.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Cc: Douglas Gilbert <dgilbert@interlog.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/sg.c')
-rw-r--r--drivers/scsi/sg.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/scsi/sg.c b/drivers/scsi/sg.c
index 1e82d4128a84..4fe606b000b4 100644
--- a/drivers/scsi/sg.c
+++ b/drivers/scsi/sg.c
@@ -759,8 +759,11 @@ static bool sg_is_valid_dxfer(sg_io_hdr_t *hp)
return false;
return true;
case SG_DXFER_FROM_DEV:
- if (hp->dxfer_len < 0)
- return false;
+ /*
+ * for SG_DXFER_FROM_DEV we always set dxfer_len to > 0. dxferp
+ * can either be NULL or != NULL so there's no point in checking
+ * it either. So just return true.
+ */
return true;
case SG_DXFER_TO_DEV:
case SG_DXFER_TO_FROM_DEV:

Privacy Policy