linux-kernel - Re: [PATCH] media: v4l: Fix MPEG-2 slice Intra DC Precision validation

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Message-ID: <41b39e603db7eb068dd9f4542d37c1f5f07ba1c0.camel@bootlin.com>
Date:   Thu, 29 Nov 2018 09:39:15 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     Jonas Karlman <jonas@...boo.se>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Keiichi Watanabe <keiichiw@...omium.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Smitha T Murthy <smitha.t@...sung.com>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Hans Verkuil <hverkuil@...all.nl>
Subject: Re: [PATCH] media: v4l: Fix MPEG-2 slice Intra DC Precision
 validation

Hi,

On Sun, 2018-11-25 at 15:21 +0000, Jonas Karlman wrote:
> intra_dc_precision is a 2-bit integer [1]
> allow use of all valid options, 8 - 11 bits precision
> 
> [1] ISO/IEC 13818-2 Table 6-13

Thanks for this patch, this is definitely a mistake from my side here!

> Fixes: c27bb30e7b6d ("media: v4l: Add definitions for MPEG-2 slice format and metadata")
> Signed-off-by: Jonas Karlman <jonas@...boo.se>

Acked-by: Paul Kocialkowski <paul.kocialkowski@...tlin.com>

Cheers,

Paul

> ---
> 
>  drivers/media/v4l2-core/v4l2-ctrls.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index 5f2b033a7a42..129a986fa7e1 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -1636,7 +1636,8 @@ static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
>  		switch (p_mpeg2_slice_params->picture.intra_dc_precision) {
>  		case 0: /* 8 bits */
>  		case 1: /* 9 bits */
> -		case 11: /* 11 bits */
> +		case 2: /* 10 bits */
> +		case 3: /* 11 bits */
>  			break;
>  		default:
>  			return -EINVAL;
-- 
Paul Kocialkowski, Bootlin (formerly Free Electrons)
Embedded Linux and kernel engineering
https://bootlin.com

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