[PATCH] media: venus: use div64_u64() instead of do_div()

From: Himanshu Bhavani
Date: Fri Dec 29 2023 - 07:16:29 EST


do_div() does a 64-by-32 division.
When the divisor is u64, do_div() truncates it to 32 bits, this means it
can test non-zero and be truncated to zero for division.

fix do_div.cocci warning:
do_div() does a 64-by-32 division, please consider using div64_u64 instead.

Signed-off-by: Himanshu Bhavani <himanshu.bhavani@xxxxxxxxxxxxxxxxx>

diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index 44b13696cf82..81853eb2993a 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -409,13 +409,13 @@ static int venc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
out->capability = V4L2_CAP_TIMEPERFRAME;

us_per_frame = timeperframe->numerator * (u64)USEC_PER_SEC;
- do_div(us_per_frame, timeperframe->denominator);
+ div64_u64(us_per_frame, timeperframe->denominator);

if (!us_per_frame)
return -EINVAL;

fps = (u64)USEC_PER_SEC;
- do_div(fps, us_per_frame);
+ div64_u64(fps, us_per_frame);

inst->timeperframe = *timeperframe;
inst->fps = fps;
--
2.25.1