[PATCH v7 5/5] media: venus: vdec: Make the range of us_per_frame explicit

[Ricardo Ribalda]

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 <quic_vgarodia@xxxxxxxxxxx>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx>
Tested-by: Bryan O'Donoghue <bryan.odonoghue@xxxxxxxxxx> # qrb5615-rb5
Signed-off-by: Ricardo Ribalda <ribalda@xxxxxxxxxxxx>
---
 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 7d6612234d18a49573dc502d48ee61a900b63194..6042eb1e8705196b754dffc16bdb714378bb4cd4 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -484,8 +484,7 @@ 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;

-- 
2.50.0.rc1.591.g9c95f17f64-goog