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

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Date:   Sun, 25 Nov 2018 15:21:42 +0000
From:   Jonas Karlman <jonas@...boo.se>
To:     "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>
CC:     Jonas Karlman <jonas@...boo.se>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Keiichi Watanabe <keiichiw@...omium.org>,
        "Paul Kocialkowski" <paul.kocialkowski@...tlin.com>,
        "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: [PATCH] media: v4l: Fix MPEG-2 slice Intra DC Precision validation

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

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

---

 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;
-- 
2.19.1