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Commit a19a5cd7 authored by Pete Eberlein's avatar Pete Eberlein Committed by Mauro Carvalho Chehab
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[media] s2255drv: remove BKL 



Remove BKL ioctl and use unlocked_ioctl with core-assisted locking instead.

Signed-off-by: default avatarPete Eberlein <pete@sensoray.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 07e80305

drivers/media/video/s2255drv.c

+10 −21
Original line number Diff line number Diff line
@@ -268,7 +268,7 @@ struct s2255_dev { 
	struct v4l2_device 	v4l2_dev;

	atomic_t                num_channels;

	int			frames;

	struct mutex		lock;

	struct mutex		lock;	/* channels[].vdev.lock */

	struct mutex		open_lock;

	struct usb_device	*udev;

	struct usb_interface	*interface;
@@ -780,20 +780,14 @@ static struct videobuf_queue_ops s2255_video_qops = { 


static int res_get(struct s2255_fh *fh)

{

	struct s2255_dev *dev = fh->dev;

	/* is it free? */

	struct s2255_channel *channel = fh->channel;

	mutex_lock(&dev->lock);

	if (channel->resources) {

		/* no, someone else uses it */

		mutex_unlock(&dev->lock);

		return 0;

	}

	/* is it free? */

	if (channel->resources)

		return 0; /* no, someone else uses it */

	/* it's free, grab it */

	channel->resources = 1;

	fh->resources = 1;

	dprintk(1, "s2255: res: get\n");

	mutex_unlock(&dev->lock);

	return 1;

}
@@ -811,11 +805,8 @@ static int res_check(struct s2255_fh *fh) 
static void res_free(struct s2255_fh *fh)

{

	struct s2255_channel *channel = fh->channel;

	struct s2255_dev *dev = fh->dev;

	mutex_lock(&dev->lock);

	channel->resources = 0;

	fh->resources = 0;

	mutex_unlock(&dev->lock);

	dprintk(1, "res: put\n");

}
@@ -1218,7 +1209,6 @@ static int s2255_set_mode(struct s2255_channel *channel, 
	__le32 *buffer;

	unsigned long chn_rev;

	struct s2255_dev *dev = to_s2255_dev(channel->vdev.v4l2_dev);

	mutex_lock(&dev->lock);

	chn_rev = G_chnmap[channel->idx];

	dprintk(3, "%s channel: %d\n", __func__, channel->idx);

	/* if JPEG, set the quality */
@@ -1235,7 +1225,6 @@ static int s2255_set_mode(struct s2255_channel *channel, 
	buffer = kzalloc(512, GFP_KERNEL);

	if (buffer == NULL) {

		dev_err(&dev->udev->dev, "out of mem\n");

		mutex_unlock(&dev->lock);

		return -ENOMEM;

	}

	/* set the mode */
@@ -1260,7 +1249,6 @@ static int s2255_set_mode(struct s2255_channel *channel, 
	}

	/* clear the restart flag */

	channel->mode.restart = 0;

	mutex_unlock(&dev->lock);

	dprintk(1, "%s chn %d, result: %d\n", __func__, channel->idx, res);

	return res;

}
@@ -1271,13 +1259,11 @@ static int s2255_cmd_status(struct s2255_channel *channel, u32 *pstatus) 
	__le32 *buffer;

	u32 chn_rev;

	struct s2255_dev *dev = to_s2255_dev(channel->vdev.v4l2_dev);

	mutex_lock(&dev->lock);

	chn_rev = G_chnmap[channel->idx];

	dprintk(4, "%s chan %d\n", __func__, channel->idx);

	buffer = kzalloc(512, GFP_KERNEL);

	if (buffer == NULL) {

		dev_err(&dev->udev->dev, "out of mem\n");

		mutex_unlock(&dev->lock);

		return -ENOMEM;

	}

	/* form the get vid status command */
@@ -1297,7 +1283,6 @@ static int s2255_cmd_status(struct s2255_channel *channel, u32 *pstatus) 
	}

	*pstatus = channel->vidstatus;

	dprintk(4, "%s, vid status %d\n", __func__, *pstatus);

	mutex_unlock(&dev->lock);

	return res;

}
@@ -1816,7 +1801,8 @@ static int s2255_open(struct file *file) 
				    NULL, &dev->slock,

				    fh->type,

				    V4L2_FIELD_INTERLACED,

				    sizeof(struct s2255_buffer), fh, NULL);

				    sizeof(struct s2255_buffer),

				    fh, vdev->lock);

	return 0;

}
@@ -1899,7 +1885,7 @@ static const struct v4l2_file_operations s2255_fops_v4l = { 
	.open = s2255_open,

	.release = s2255_release,

	.poll = s2255_poll,

	.ioctl = video_ioctl2,	/* V4L2 ioctl handler */

	.unlocked_ioctl = video_ioctl2,	/* V4L2 ioctl handler */

	.mmap = s2255_mmap_v4l,

};
@@ -1969,6 +1955,7 @@ static int s2255_probe_v4l(struct s2255_dev *dev) 
		channel->vidq.dev = dev;

		/* register 4 video devices */

		channel->vdev = template;

		channel->vdev.lock = &dev->lock;

		channel->vdev.v4l2_dev = &dev->v4l2_dev;

		video_set_drvdata(&channel->vdev, channel);

		if (video_nr == -1)
@@ -2675,7 +2662,9 @@ static void s2255_disconnect(struct usb_interface *interface) 
	struct s2255_dev *dev = to_s2255_dev(usb_get_intfdata(interface));

	int i;

	int channels = atomic_read(&dev->num_channels);

	mutex_lock(&dev->lock);

	v4l2_device_disconnect(&dev->v4l2_dev);

	mutex_unlock(&dev->lock);

	/*see comments in the uvc_driver.c usb disconnect function */

	atomic_inc(&dev->num_channels);

	/* unregister each video device. */