linux-kernel - [PATCH 4.4 077/160] media: em28xx: use a default format if TRY

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Message-Id: <20181119162638.703996101@linuxfoundation.org>
Date:   Mon, 19 Nov 2018 17:28:36 +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,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Subject: [PATCH 4.4 077/160] media: em28xx: use a default format if TRY_FMT fails

4.4-stable review patch.  If anyone has any objections, please let me know.

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

From: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>

commit f823ce2a1202d47110a7ef86b65839f0be8adc38 upstream.

Follow the V4L2 spec, as warned by v4l2-compliance:

	warn: v4l2-test-formats.cpp(732): TRY_FMT cannot handle an invalid pixelformat.
	warn: v4l2-test-formats.cpp(733): This may or may not be a problem. For more information see:

warn: v4l2-test-formats.cpp(734): http://www.mail-archive.com/linux-media@vger.kernel.org/msg56550.html

Cc: stable@...r.kernel.org
Fixes: bddcf63313c6 ("V4L/DVB (9927): em28xx: use a more standard way to specify video formats")
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/usb/em28xx/em28xx-video.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -1288,9 +1288,9 @@ static int vidioc_try_fmt_vid_cap(struct
 
 	fmt = format_by_fourcc(f->fmt.pix.pixelformat);
 	if (!fmt) {
-		em28xx_videodbg("Fourcc format (%08x) invalid.\n",
-				f->fmt.pix.pixelformat);
-		return -EINVAL;
+		fmt = &format[0];
+		em28xx_videodbg("Fourcc format (%08x) invalid. Using default (%08x).\n",
+				f->fmt.pix.pixelformat, fmt->fourcc);
 	}
 
 	if (dev->board.is_em2800) {