linux-kernel - [PATCH 3.2 006/115] [media] saa7134: Fix bytesperline not being set correctly for planar formats

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Message-ID: <lsq.1461711744.316494936@decadent.org.uk>
Date:	Wed, 27 Apr 2016 01:02:24 +0200
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:	akpm@...ux-foundation.org, "Hans de Goede" <hdegoede@...hat.com>,
	"Mauro Carvalho Chehab" <mchehab@....samsung.com>,
	"Hans Verkuil" <hans.verkuil@...co.com>
Subject: [PATCH 3.2 006/115] [media] saa7134: Fix bytesperline not being
 set correctly for planar formats

3.2.80-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Hans de Goede <hdegoede@...hat.com>

commit 3e71da19f9dc22e39a755d6ae9678661abb66adc upstream.

bytesperline should be the bytesperline for the first plane for planar
formats, not that of all planes combined.

This fixes a crash in xawtv caused by the wrong bpl.

BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1305389
Reported-and-tested-by: Stas Sergeev <stsp@...t.ru>

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Signed-off-by: Hans Verkuil <hans.verkuil@...co.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@....samsung.com>
[bwh: Backported to 3.2: adjust filename, context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/media/video/saa7134/saa7134-video.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

--- a/drivers/media/video/saa7134/saa7134-video.c
+++ b/drivers/media/video/saa7134/saa7134-video.c
@@ -1577,10 +1577,13 @@ static int saa7134_g_fmt_vid_cap(struct
 	f->fmt.pix.height       = fh->height;
 	f->fmt.pix.field        = fh->cap.field;
 	f->fmt.pix.pixelformat  = fh->fmt->fourcc;
-	f->fmt.pix.bytesperline =
-		(f->fmt.pix.width * fh->fmt->depth) >> 3;
+	if (fh->fmt->planar)
+		f->fmt.pix.bytesperline = f->fmt.pix.width;
+	else
+		f->fmt.pix.bytesperline =
+			(f->fmt.pix.width * fh->fmt->depth) / 8;
 	f->fmt.pix.sizeimage =
-		f->fmt.pix.height * f->fmt.pix.bytesperline;
+		(f->fmt.pix.height * f->fmt.pix.width * fh->fmt->depth) / 8;
 	return 0;
 }
 
@@ -1641,10 +1644,13 @@ static int saa7134_try_fmt_vid_cap(struc
 	if (f->fmt.pix.height > maxh)
 		f->fmt.pix.height = maxh;
 	f->fmt.pix.width &= ~0x03;
-	f->fmt.pix.bytesperline =
-		(f->fmt.pix.width * fmt->depth) >> 3;
+	if (fmt->planar)
+		f->fmt.pix.bytesperline = f->fmt.pix.width;
+	else
+		f->fmt.pix.bytesperline =
+			(f->fmt.pix.width * fmt->depth) / 8;
 	f->fmt.pix.sizeimage =
-		f->fmt.pix.height * f->fmt.pix.bytesperline;
+		(f->fmt.pix.height * f->fmt.pix.width * fmt->depth) / 8;
 
 	return 0;
 }