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Subject: Re: [PATCH v3] staging: media: meson: vdec: declare u32 as static
 const
To:     Mitali Borkar <mitaliborkar810@gmail.com>, narmstrong@baylibre.com,
        mchehab@kernel.org, gregkh@linuxfoundation.org,
        khilman@baylibre.com, jbrunet@baylibre.com,
        martin.blumenstingl@googlemail.com
Cc:     linux-media@vger.kernel.org, linux-staging@lists.linux.dev,
        linux-kernel@vger.kernel.org, outreachy-kernel@googlegroups.com,
        linux-amlogic@lists.infradead.org, mitali_s@me.iitr.ac.in
References: <YHWmiBYAbOUw5YrY@kali>
From:   Hans Verkuil <hverkuil@xs4all.nl>
Message-ID: <a7162f8a-e706-c144-c355-7e2a130c453d@xs4all.nl>
Date:   Tue, 13 Apr 2021 17:10:09 +0200
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On 13/04/2021 16:11, Mitali Borkar wrote:
> Declared 32 bit unsigned int as static constant inside a function and
> replaced u32[] {x,y} as canvas3, canvas4 in codec_h264.c
> This indicates the value of canvas indexes will remain constant throughout execution.

checkpatch.pl output:

WARNING: Possible unwrapped commit description (prefer a maximum 75 chars per line)
#9:
This indicates the value of canvas indexes will remain constant throughout execution.

Regards,

	Hans

> 
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Mitali Borkar <mitaliborkar810@gmail.com>
> ---
> Changes from v2:- Rebased this patch and made changes against mainline code
> Changes from v1:- Rectified mistake by declaring u32 as static const
> properly as static const u32 canvas'x'[]
> 
>  drivers/staging/media/meson/vdec/codec_h264.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/staging/media/meson/vdec/codec_h264.c b/drivers/staging/media/meson/vdec/codec_h264.c
> index c61128fc4bb9..80141b89a9f6 100644
> --- a/drivers/staging/media/meson/vdec/codec_h264.c
> +++ b/drivers/staging/media/meson/vdec/codec_h264.c
> @@ -287,10 +287,10 @@ static void codec_h264_resume(struct amvdec_session *sess)
>  	struct amvdec_core *core = sess->core;
>  	struct codec_h264 *h264 = sess->priv;
>  	u32 mb_width, mb_height, mb_total;
> +	static const u32 canvas3[] = { ANCO_CANVAS_ADDR, 0 };
> +	static const u32 canvas4[] = { 24, 0 };
>  
> -	amvdec_set_canvases(sess,
> -			    (u32[]){ ANC0_CANVAS_ADDR, 0 },
> -			    (u32[]){ 24, 0 });
> +	amvdec_set_canvases(sess, canvas3, canvas4);
>  
>  	dev_dbg(core->dev, "max_refs = %u; actual_dpb_size = %u\n",
>  		h264->max_refs, sess->num_dst_bufs);
>