[linux-3.16-rc5/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c:210]:
(style) Checking if unsigned variable 'val' is less than zero.
val = get_oneshot_mode(ipipeif->input);
if (val < 0) {
pr_err("ipipeif: links setup required");
return -EINVAL;
}
but
static int get_oneshot_mode(enum ipipeif_input_entity input)
Introduced temporary variable for negativity check.
"val" is afterwards used in a lot of bitwise operations, so changing its type
to signed is not safe, according to CERT C Secure Coding Standards chapter
INT13-C: "Use bitwise operators only on unsigned operands"
https://www.securecoding.cert.org/confluence/display/seccode/INT13-C.+Use+bitwise+operators+only+on+unsigned+operands
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=80521
Reported-by: David Binderman <[email protected]>
Signed-off-by: Andrey Utkin <[email protected]>
---
drivers/staging/media/davinci_vpfe/dm365_ipipeif.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c b/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c
index 59540cd..6d4893b 100644
--- a/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c
+++ b/drivers/staging/media/davinci_vpfe/dm365_ipipeif.c
@@ -196,6 +196,7 @@ static int ipipeif_hw_setup(struct v4l2_subdev *sd)
int data_shift;
int pack_mode;
int source1;
+ int tmp;
ipipeif_base_addr = ipipeif->ipipeif_base_addr;
@@ -206,8 +207,8 @@ static int ipipeif_hw_setup(struct v4l2_subdev *sd)
outformat = &ipipeif->formats[IPIPEIF_PAD_SOURCE];
/* Combine all the fields to make CFG1 register of IPIPEIF */
- val = get_oneshot_mode(ipipeif->input);
- if (val < 0) {
+ tmp = val = get_oneshot_mode(ipipeif->input);
+ if (tmp < 0) {
pr_err("ipipeif: links setup required");
return -EINVAL;
}
--
1.8.5.5