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From:   Sasha Levin <Alexander.Levin@microsoft.com>
To:     "stable@vger.kernel.org" <stable@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Nicholas Mc Guire <hofrat@osadl.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Sasha Levin <Alexander.Levin@microsoft.com>
Subject: [PATCH AUTOSEL 4.18 58/88] staging: bcm2835-camera: handle
 wait_for_completion_timeout return properly
Thread-Topic: [PATCH AUTOSEL 4.18 58/88] staging: bcm2835-camera: handle
 wait_for_completion_timeout return properly
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Date:   Fri, 7 Sep 2018 00:36:34 +0000
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From: Nicholas Mc Guire <hofrat@osadl.org>

[ Upstream commit 5b70084f6cbcd53f615433f9d216e01bd71de0bb ]

wait_for_completion_timeout returns unsigned long not int so a variable of
proper type is introduced. Further the check for <=3D 0 is ambiguous and
should be =3D=3D 0 here indicating timeout.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Fixes: 7b3ad5abf027 ("staging: Import the BCM2835 MMAL-based V4L2 camera dr=
iver.")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
 .../staging/vc04_services/bcm2835-camera/bcm2835-camera.c  | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c =
b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
index ce26741ae9d9..3f61d04c47ab 100644
--- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
+++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
@@ -580,6 +580,7 @@ static int start_streaming(struct vb2_queue *vq, unsign=
ed int count)
 static void stop_streaming(struct vb2_queue *vq)
 {
 	int ret;
+	unsigned long timeout;
 	struct bm2835_mmal_dev *dev =3D vb2_get_drv_priv(vq);
=20
 	v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev, "%s: dev:%p\n",
@@ -605,10 +606,10 @@ static void stop_streaming(struct vb2_queue *vq)
 				      sizeof(dev->capture.frame_count));
=20
 	/* wait for last frame to complete */
-	ret =3D wait_for_completion_timeout(&dev->capture.frame_cmplt, HZ);
-	if (ret <=3D 0)
+	timeout =3D wait_for_completion_timeout(&dev->capture.frame_cmplt, HZ);
+	if (timeout =3D=3D 0)
 		v4l2_err(&dev->v4l2_dev,
-			 "error %d waiting for frame completion\n", ret);
+			 "timed out waiting for frame completion\n");
=20
 	v4l2_dbg(1, bcm2835_v4l2_debug, &dev->v4l2_dev,
 		 "disabling connection\n");
--=20
2.17.1