Hi Dan, Good catch! Reviewed-by: Andrey Konovalov <andrey.konovalov@xxxxxxxxxx> Thanks, Andrey On 09.12.2020 13:55, Robert Foss wrote:
Hey Dan, Thank you for submitting this. Reviewed-by: Robert Foss <robert.foss@xxxxxxxxxx> On Wed, 9 Dec 2020 at 07:50, Dan Carpenter <dan.carpenter@xxxxxxxxxx> wrote:This test has a problem because we want to know if "k" is -1 or a positive value less than "f->index". But the "f->index" variable is a u32 so if "k == -1" then -1 gets type promoted to UINT_MAX which is larger than "f->index". I've added an explicit test to check for -1. Fixes: a3d412d4b9f3 ("media: Revert "media: camss: Make use of V4L2_CAP_IO_MC"") Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> --- I could equally well have casted "k < (int)f->index" but I feel like this is more explicit and readable. drivers/media/platform/qcom/camss/camss-video.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/media/platform/qcom/camss/camss-video.c b/drivers/media/platform/qcom/camss/camss-video.c index bd9334af1c73..2fa3214775d5 100644 --- a/drivers/media/platform/qcom/camss/camss-video.c +++ b/drivers/media/platform/qcom/camss/camss-video.c @@ -579,7 +579,7 @@ static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f) break; } - if (k < f->index) + if (k == -1 || k < f->index) /* * All the unique pixel formats matching the arguments * have been enumerated (k >= 0 and f->index > 0), or -- 2.29.2
