linux-kernel - [ 18/48] [media] gspca-core: Fix buffers staying in queued state after a stream

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Message-Id: <20120701172009.229156155@decadent.org.uk>
Date:	Sun, 01 Jul 2012 18:20:24 +0100
From:	Ben Hutchings <ben@...adent.org.uk>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Hans de Goede <hdegoede@...hat.com>,
	Antonio Ospite <ospite@...denti.unina.it>,
	Mauro Carvalho Chehab <mchehab@...hat.com>
Subject: [ 18/48] [media] gspca-core: Fix buffers staying in queued state after a
 stream_off

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

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

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

commit af05ef01e9cde84620c6855a8d8ab9c8a1db9009 upstream.

This fixes a regression introduced by commit f7059ea and should be
backported to all supported stable kernels which have this commit.

Signed-off-by: Hans de Goede <hdegoede@...hat.com>
Tested-by: Antonio Ospite <ospite@...denti.unina.it>
Signed-off-by: Mauro Carvalho Chehab <mchehab@...hat.com>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
 drivers/media/video/gspca/gspca.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/drivers/media/video/gspca/gspca.c
+++ b/drivers/media/video/gspca/gspca.c
@@ -1697,7 +1697,7 @@
 				enum v4l2_buf_type buf_type)
 {
 	struct gspca_dev *gspca_dev = priv;
-	int ret;
+	int i, ret;
 
 	if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
 		return -EINVAL;
@@ -1728,6 +1728,8 @@
 	wake_up_interruptible(&gspca_dev->wq);
 
 	/* empty the transfer queues */
+	for (i = 0; i < gspca_dev->nframes; i++)
+		gspca_dev->frame[i].v4l2_buf.flags &= ~BUF_ALL_FLAGS;
 	atomic_set(&gspca_dev->fr_q, 0);
 	atomic_set(&gspca_dev->fr_i, 0);
 	gspca_dev->fr_o = 0;


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