diff options
| author | Janne Grunau <j@jannau.net> | 2009-03-26 20:56:06 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2009-03-30 12:43:42 -0300 |
| commit | 48f98f7557d35d360470bf6d9fd7b00d04fba828 (patch) | |
| tree | 8231070b0a8fce217cc061ac50979afd1ef72294 | |
| parent | d2ff3ec81628cbf9470c496b3d0c0780165643f5 (diff) | |
V4L/DVB (11231): hdpvr: locking fixes
unlock io_mutex in hdpvr_stop_streaming hdpvr_disconnect to allow the
streaming worker to stop before we flush the workqueue.
do not return to user space with mutex held in vidioc_encoder_cmd with
an unknown encoder command.
Signed-off-by: Janne Grunau <j@jannau.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/video/hdpvr/hdpvr-core.c | 2 | ||||
| -rw-r--r-- | drivers/media/video/hdpvr/hdpvr-video.c | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/drivers/media/video/hdpvr/hdpvr-core.c b/drivers/media/video/hdpvr/hdpvr-core.c index 2c49862b6d3..547833eb6ce 100644 --- a/drivers/media/video/hdpvr/hdpvr-core.c +++ b/drivers/media/video/hdpvr/hdpvr-core.c @@ -390,8 +390,10 @@ static void hdpvr_disconnect(struct usb_interface *interface) video_unregister_device(dev->video_dev); wake_up_interruptible(&dev->wait_data); wake_up_interruptible(&dev->wait_buffer); + mutex_unlock(&dev->io_mutex); msleep(100); flush_workqueue(dev->workqueue); + mutex_lock(&dev->io_mutex); hdpvr_cancel_queue(dev); destroy_workqueue(dev->workqueue); mutex_unlock(&dev->io_mutex); diff --git a/drivers/media/video/hdpvr/hdpvr-video.c b/drivers/media/video/hdpvr/hdpvr-video.c index e9078cdedb2..2fe57303c0b 100644 --- a/drivers/media/video/hdpvr/hdpvr-video.c +++ b/drivers/media/video/hdpvr/hdpvr-video.c @@ -300,12 +300,14 @@ static int hdpvr_stop_streaming(struct hdpvr_device *dev) dev->status = STATUS_SHUTTING_DOWN; hdpvr_config_call(dev, CTRL_STOP_STREAMING_VALUE, 0x00); + mutex_unlock(&dev->io_mutex); wake_up_interruptible(&dev->wait_buffer); msleep(50); flush_workqueue(dev->workqueue); + mutex_lock(&dev->io_mutex); /* kill the still outstanding urbs */ hdpvr_cancel_queue(dev); @@ -1130,7 +1132,7 @@ static int vidioc_encoder_cmd(struct file *filp, void *priv, default: v4l2_dbg(MSG_INFO, hdpvr_debug, dev->video_dev, "Unsupported encoder cmd %d\n", a->cmd); - return -EINVAL; + res = -EINVAL; } mutex_unlock(&dev->io_mutex); return res; |