linux-kernel - [PATCH v2 24/26] media: venus: venc: Make explicit the range of us_per

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Date: Fri, 19 Apr 2024 09:48:10 +0000
From: Ricardo Ribalda <ribalda@...omium.org>
To: Martin Tuma <martin.tuma@...iteqautomotive.com>, 
 Mauro Carvalho Chehab <mchehab@...nel.org>, 
 Laurent Pinchart <laurent.pinchart@...asonboard.com>, 
 Hugues Fruchet <hugues.fruchet@...s.st.com>, 
 Alain Volmat <alain.volmat@...s.st.com>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>, 
 Paul Kocialkowski <paul.kocialkowski@...tlin.com>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>, 
 Sowjanya Komatineni <skomatineni@...dia.com>, 
 Luca Ceresoli <luca.ceresoli@...tlin.com>, 
 Matthias Brugger <matthias.bgg@...il.com>, 
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, 
 Hans Verkuil <hverkuil@...all.nl>, Sergey Kozlov <serjk@...up.ru>, 
 Abylay Ospan <aospan@...up.ru>, 
 Ezequiel Garcia <ezequiel@...guardiasur.com.ar>, 
 Dmitry Osipenko <digetx@...il.com>, 
 Benjamin Mugnier <benjamin.mugnier@...s.st.com>, 
 Sylvain Petinot <sylvain.petinot@...s.st.com>, 
 Stanimir Varbanov <stanimir.k.varbanov@...il.com>, 
 Vikash Garodia <quic_vgarodia@...cinc.com>, 
 Bryan O'Donoghue <bryan.odonoghue@...aro.org>, 
 Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konrad.dybcio@...aro.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-stm32@...md-mailman.stormreply.com, 
 linux-arm-kernel@...ts.infradead.org, linux-staging@...ts.linux.dev, 
 linux-sunxi@...ts.linux.dev, linux-tegra@...r.kernel.org, 
 linux-mediatek@...ts.infradead.org, linux-arm-msm@...r.kernel.org, 
 Ricardo Ribalda <ribalda@...omium.org>
Subject: [PATCH v2 24/26] media: venus: venc: Make explicit the range of
 us_per_frame

Unless the fps is smaller than 0.000232829 fps, this fits in a 32 bit
number. Make that explicit.

Found with cocci:
drivers/media/platform/qcom/venus/venc.c:418:1-7: WARNING: do_div() does a 64-by-32 division, please consider using div64_u64 instead.

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

diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index 3ec2fb8d9fab..f87e33a34610 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -393,7 +393,7 @@ static int venc_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a)
 	struct venus_inst *inst = to_inst(file);
 	struct v4l2_outputparm *out = &a->parm.output;
 	struct v4l2_fract *timeperframe = &out->timeperframe;
-	u64 us_per_frame, fps;
+	u64 us_per_frame;
 
 	if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT &&
 	    a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
@@ -414,11 +414,8 @@ static int venc_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 = USEC_PER_SEC / (u32)us_per_frame;
 	inst->timeperframe = *timeperframe;
-	inst->fps = fps;
 
 	return 0;
 }

-- 
2.44.0.769.g3c40516874-goog