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Message-ID: <6b1627ff-5135-4685-be35-adf74a456469@linaro.org>
Date: Sat, 20 Apr 2024 23:47:33 +0100
From: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To: Ricardo Ribalda <ribalda@...omium.org>,
Martin Tuma <martin.tuma@...iteqautomotive.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
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<wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>,
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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
Subject: Re: [PATCH v2 24/26] media: venus: venc: Make explicit the range of
us_per_frame
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 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;
> }
>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
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