linux-kernel - [PATCH 4.9 143/199] video/hdmi: Fix AVI bar unpack

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Date:   Thu, 19 Dec 2019 19:33:45 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, linux-media@...r.kernel.org,
        Martin Bugge <marbugge@...co.com>,
        Hans Verkuil <hans.verkuil@...co.com>,
        Thierry Reding <treding@...dia.com>,
        Mauro Carvalho Chehab <mchehab@....samsung.com>,
        Ville Syrjälä 
        <ville.syrjala@...ux.intel.com>
Subject: [PATCH 4.9 143/199] video/hdmi: Fix AVI bar unpack

From: Ville Syrjälä <ville.syrjala@...ux.intel.com>

commit 6039f37dd6b76641198e290f26b31c475248f567 upstream.

The bar values are little endian, not big endian. The pack
function did it right but the unpack got it wrong. Fix it.

Cc: stable@...r.kernel.org
Cc: linux-media@...r.kernel.org
Cc: Martin Bugge <marbugge@...co.com>
Cc: Hans Verkuil <hans.verkuil@...co.com>
Cc: Thierry Reding <treding@...dia.com>
Cc: Mauro Carvalho Chehab <mchehab@....samsung.com>
Fixes: 2c676f378edb ("[media] hdmi: added unpack and logging functions for InfoFrames")
Signed-off-by: Ville Syrjälä <ville.syrjala@...ux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190919132853.30954-1-ville.syrjala@linux.intel.com
Reviewed-by: Thierry Reding <treding@...dia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/video/hdmi.c |    8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

--- a/drivers/video/hdmi.c
+++ b/drivers/video/hdmi.c
@@ -1032,12 +1032,12 @@ static int hdmi_avi_infoframe_unpack(str
 	if (ptr[0] & 0x10)
 		frame->active_aspect = ptr[1] & 0xf;
 	if (ptr[0] & 0x8) {
-		frame->top_bar = (ptr[5] << 8) + ptr[6];
-		frame->bottom_bar = (ptr[7] << 8) + ptr[8];
+		frame->top_bar = (ptr[6] << 8) | ptr[5];
+		frame->bottom_bar = (ptr[8] << 8) | ptr[7];
 	}
 	if (ptr[0] & 0x4) {
-		frame->left_bar = (ptr[9] << 8) + ptr[10];
-		frame->right_bar = (ptr[11] << 8) + ptr[12];
+		frame->left_bar = (ptr[10] << 8) | ptr[9];
+		frame->right_bar = (ptr[12] << 8) | ptr[11];
 	}
 	frame->scan_mode = ptr[0] & 0x3;