Remove BKL ioctl and use unlocked_ioctl with core-assisted locking instead.
Signed-off-by: Pete Eberlein <pete@xxxxxxxxxxxx>
diff --git a/drivers/media/video/s2255drv.c b/drivers/media/video/s2255drv.c
index f5a46c4..a216d62 100644
--- a/drivers/media/video/s2255drv.c
+++ b/drivers/media/video/s2255drv.c
@@ -269,7 +269,7 @@ 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;
@@ -781,20 +781,14 @@ 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;
}
@@ -812,11 +806,8 @@ 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");
}
@@ -1219,7 +1210,6 @@ 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 */
@@ -1236,7 +1226,6 @@ 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 */
@@ -1261,7 +1250,6 @@ 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;
}
@@ -1272,13 +1260,11 @@ 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 */
@@ -1298,7 +1284,6 @@ 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;
}
@@ -1817,7 +1802,8 @@ 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;
}
@@ -1900,7 +1886,7 @@ 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,
};
@@ -1970,6 +1956,7 @@ 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)
@@ -2676,7 +2663,9 @@ 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. */
--
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