linux-kernel - Re: [PATCH v9 2/6] media: verisilicon: Do not use ctx fields as format storage when resetting

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Message-Id: <ZPUOQR.4QD6IOKPPRQ@vanguardiasur.com.ar>
Date:   Sun, 26 Feb 2023 09:58:47 -0300
From:   Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>
Cc:     p.zabel@...gutronix.de, mchehab@...nel.org, shawnguo@...nel.org,
        s.hauer@...gutronix.de, kernel@...gutronix.de, festevam@...il.com,
        linux-imx@....com, hverkuil-cisco@...all.nl,
        nicolas.dufresne@...labora.co.uk, robert.mader@...labora.com,
        linux-media@...r.kernel.org, linux-rockchip@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kernel@...labora.com
Subject: Re: [PATCH v9 2/6] media: verisilicon: Do not use ctx fields as
 format storage when resetting



On Mon, Feb 20 2023 at 11:48:45 AM +0100, Benjamin Gaignard 
<benjamin.gaignard@...labora.com> wrote:
> Source and destination pixel formats fields of context structure 
> should
> not be used as storage when resetting the format.
> Use local variables instead and let hantro_set_fmt_out() and
> hantro_set_fmt_cap() set them correctly later.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>

Reviewed-by: Ezequiel Garcia <ezequiel@...guardiasur.com.ar>

> ---
>  .../media/platform/verisilicon/hantro_v4l2.c  | 40 
> +++++++++----------
>  1 file changed, 18 insertions(+), 22 deletions(-)
> 
> diff --git a/drivers/media/platform/verisilicon/hantro_v4l2.c 
> b/drivers/media/platform/verisilicon/hantro_v4l2.c
> index d8aa42bd4cd4..d94c99f875c8 100644
> --- a/drivers/media/platform/verisilicon/hantro_v4l2.c
> +++ b/drivers/media/platform/verisilicon/hantro_v4l2.c
> @@ -378,47 +378,43 @@ static void
>  hantro_reset_encoded_fmt(struct hantro_ctx *ctx)
>  {
>  	const struct hantro_fmt *vpu_fmt;
> -	struct v4l2_pix_format_mplane *fmt;
> +	struct v4l2_pix_format_mplane fmt;
> 
>  	vpu_fmt = hantro_get_default_fmt(ctx, true);
> +	if (!vpu_fmt)
> +		return;
> 
> +	hantro_reset_fmt(&fmt, vpu_fmt);
> +	fmt.width = vpu_fmt->frmsize.min_width;
> +	fmt.height = vpu_fmt->frmsize.min_height;
>  	if (ctx->is_encoder)
> -		fmt = &ctx->dst_fmt;
> -	else
> -		fmt = &ctx->src_fmt;
> -
> -	hantro_reset_fmt(fmt, vpu_fmt);
> -	fmt->width = vpu_fmt->frmsize.min_width;
> -	fmt->height = vpu_fmt->frmsize.min_height;
> -	if (ctx->is_encoder)
> -		hantro_set_fmt_cap(ctx, fmt);
> +		hantro_set_fmt_cap(ctx, &fmt);
>  	else
> -		hantro_set_fmt_out(ctx, fmt);
> +		hantro_set_fmt_out(ctx, &fmt);
>  }
> 
>  static void
>  hantro_reset_raw_fmt(struct hantro_ctx *ctx)
>  {
>  	const struct hantro_fmt *raw_vpu_fmt;
> -	struct v4l2_pix_format_mplane *raw_fmt, *encoded_fmt;
> +	struct v4l2_pix_format_mplane raw_fmt, *encoded_fmt;
> 
>  	raw_vpu_fmt = hantro_get_default_fmt(ctx, false);
> +	if (!raw_vpu_fmt)
> +		return;
> 
> -	if (ctx->is_encoder) {
> -		raw_fmt = &ctx->src_fmt;
> +	if (ctx->is_encoder)
>  		encoded_fmt = &ctx->dst_fmt;
> -	} else {
> -		raw_fmt = &ctx->dst_fmt;
> +	else
>  		encoded_fmt = &ctx->src_fmt;
> -	}
> 
> -	hantro_reset_fmt(raw_fmt, raw_vpu_fmt);
> -	raw_fmt->width = encoded_fmt->width;
> -	raw_fmt->height = encoded_fmt->height;
> +	hantro_reset_fmt(&raw_fmt, raw_vpu_fmt);
> +	raw_fmt.width = encoded_fmt->width;
> +	raw_fmt.height = encoded_fmt->height;
>  	if (ctx->is_encoder)
> -		hantro_set_fmt_out(ctx, raw_fmt);
> +		hantro_set_fmt_out(ctx, &raw_fmt);
>  	else
> -		hantro_set_fmt_cap(ctx, raw_fmt);
> +		hantro_set_fmt_cap(ctx, &raw_fmt);
>  }
> 
>  void hantro_reset_fmts(struct hantro_ctx *ctx)
> --
> 2.34.1
>