On 12.07.2020 17:24, trix@redhat.com wrote:
From: Tom Rix trix@redhat.com
clang static analysis flags this error
sil-sii8620.c:184:2: warning: Undefined or garbage value returned to caller [core.uninitialized.UndefReturn] return ret; ^~~~~~~~~~
sii8620_readb calls sii8620_read_buf. sii8620_read_buf can return without setting its output pararmeter 'ret'.
So initialize ret.
Fixes: ce6e153f414a ("drm/bridge: add Silicon Image SiI8620 driver")
Signed-off-by: Tom Rix trix@redhat.com
drivers/gpu/drm/bridge/sil-sii8620.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/sil-sii8620.c b/drivers/gpu/drm/bridge/sil-sii8620.c index 3540e4931383..da933d477e5f 100644 --- a/drivers/gpu/drm/bridge/sil-sii8620.c +++ b/drivers/gpu/drm/bridge/sil-sii8620.c @@ -178,7 +178,7 @@ static void sii8620_read_buf(struct sii8620 *ctx, u16 addr, u8 *buf, int len) static u8 sii8620_readb(struct sii8620 *ctx, u16 addr) {
- u8 ret;
- u8 ret = 0;
In theory it shouldn't cause any harm, but this protections makes things simpler.
Reviewed-by: Andrzej Hajda a.hajda@samsung.com
Regards Andrzej
sii8620_read_buf(ctx, addr, &ret, 1); return ret;