Re: [PATCH v2 23/26] media: venus: vdec: Make explicit the range of us_per_frame

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On 19/04/2024 10:48, Ricardo Ribalda wrote:
Unless the fps is smaller than 0.000232829 fps, this fits in a 32 bit
number. Make that explicit.

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.

Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
  drivers/media/platform/qcom/venus/vdec.c | 7 ++-----
  1 file changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index 29130a9441e7..2b2874aedb2d 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -464,7 +464,7 @@ static int vdec_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
  	struct venus_inst *inst = to_inst(file);
  	struct v4l2_captureparm *cap = &a->parm.capture;
  	struct v4l2_fract *timeperframe = &cap->timeperframe;
-	u64 us_per_frame, fps;
+	u64 us_per_frame;
if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE &&
  	    a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
@@ -484,10 +484,7 @@ static int vdec_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
  	if (!us_per_frame)
  		return -EINVAL;
- fps = (u64)USEC_PER_SEC;
-	do_div(fps, us_per_frame);
-
-	inst->fps = fps;
+	inst->fps = USEC_PER_SEC / (u32)us_per_frame;
  	inst->timeperframe = *timeperframe;
return 0;


Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>




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