Clang with W=1 produces the following warnings:
drivers/media/platform/omap3isp/isph3a_af.c:173:6: error: result of comparison of constant 256 with expression of type '__u8' (aka 'unsigned char') is always false [-Werror,-Wtautological-constant-out-of-range-compare]
if (IS_OUT_OF_BOUNDS(paxel_cfg->height, OMAP3ISP_AF_PAXEL_HEIGHT_MIN,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/omap3isp/isph3a_af.c:24:33: note: expanded from macro 'IS_OUT_OF_BOUNDS'
(((value) < (min)) || ((value) > (max)))
~~~~~~~ ^ ~~~~~
drivers/media/platform/omap3isp/isph3a_af.c:179:6: error: result of comparison of constant 256 with expression of type '__u8' (aka 'unsigned char') is always false [-Werror,-Wtautological-constant-out-of-range-compare]
if (IS_OUT_OF_BOUNDS(paxel_cfg->width, OMAP3ISP_AF_PAXEL_WIDTH_MIN,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/media/platform/omap3isp/isph3a_af.c:24:33: note: expanded from macro 'IS_OUT_OF_BOUNDS'
(((value) < (min)) || ((value) > (max)))
~~~~~~~ ^ ~~~~~
2 errors generated.
Use a typecast to avoid such warnings.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
---
To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover.
See [PATCH 00/10] at: https://lore.kernel.org/all/cover.1637573097.git.mchehab+huawei@xxxxxxxxxx/
drivers/media/platform/omap3isp/isph3a_af.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/media/platform/omap3isp/isph3a_af.c b/drivers/media/platform/omap3isp/isph3a_af.c
index a65cfdfa9637..de7b116d0122 100644
--- a/drivers/media/platform/omap3isp/isph3a_af.c
+++ b/drivers/media/platform/omap3isp/isph3a_af.c
@@ -21,7 +21,7 @@
#include "ispstat.h"
#define IS_OUT_OF_BOUNDS(value, min, max) \
- (((value) < (min)) || ((value) > (max)))
+ ((((unsigned int)value) < (min)) || (((unsigned int)value) > (max)))
static void h3a_af_setup_regs(struct ispstat *af, void *priv)
{
--
2.33.1
