On Mon Jun 16 15:29:18 2025 +0000, Ricardo Ribalda wrote:
> Fps bigger than 0.000232829 fps, this fits in a 32 bit us_per_frame.
> There is no need to do a 64 bit division here.
> Also, the driver only works with whole fps.
>
> Found by cocci:
> drivers/media/platform/qcom/venus/vdec.c:488:1-7: WARNING: do_div() does a
> 64-by-32 division, please consider using div64_u64 instead.
>
> Reviewed-by: Vikash Garodia <[email protected]>
> Reviewed-by: Bryan O'Donoghue <[email protected]>
> Tested-by: Bryan O'Donoghue <[email protected]> # qrb5615-rb5
> Signed-off-by: Ricardo Ribalda <[email protected]>
> Signed-off-by: Bryan O'Donoghue <[email protected]>
> Signed-off-by: Hans Verkuil <[email protected]>
Patch committed.
Thanks,
Hans Verkuil
drivers/media/platform/qcom/venus/vdec.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/drivers/media/platform/qcom/venus/vdec.c
b/drivers/media/platform/qcom/venus/vdec.c
index fca27be61f4b..29b0d6a5303d 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -482,8 +482,7 @@ static int vdec_s_parm(struct file *file, void *fh, struct
v4l2_streamparm *a)
do_div(us_per_frame, timeperframe->denominator);
us_per_frame = clamp(us_per_frame, 1, USEC_PER_SEC);
- fps = (u64)USEC_PER_SEC;
- do_div(fps, us_per_frame);
+ fps = USEC_PER_SEC / (u32)us_per_frame;
fps = min(VENUS_MAX_FPS, fps);
inst->fps = fps;
