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[media] cx231xx: remove V4L2_FL_LOCK_ALL_FOPS

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Add proper locking to the file operations, allowing for the removal
of the V4L2_FL_LOCK_ALL_FOPS flag.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2012-06-24 06:43:02 -03:00 committed by Mauro Carvalho Chehab
parent 28c3682ac5
commit 1f7e073da5
1 changed files with 36 additions and 11 deletions
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47
drivers/media/video/cx231xx/cx231xx-video.c
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@ -2168,6 +2168,10 @@ static int cx231xx_v4l2_open(struct file *filp)
cx231xx_errdev("cx231xx-video.c: Out of memory?!\n");
return -ENOMEM;
}
if (mutex_lock_interruptible(&dev->lock)) {
kfree(fh);
return -ERESTARTSYS;
}
fh->dev = dev;
fh->radio = radio;
fh->type = fh_type;
@ -2226,6 +2230,7 @@ static int cx231xx_v4l2_open(struct file *filp)
sizeof(struct cx231xx_buffer),
fh, &dev->lock);
}
mutex_unlock(&dev->lock);
return errCode;
}
@ -2272,11 +2277,11 @@ void cx231xx_release_analog_resources(struct cx231xx *dev)
}
/*
* cx231xx_v4l2_close()
* cx231xx_close()
* stops streaming and deallocates all resources allocated by the v4l2
* calls and ioctls
*/
static int cx231xx_v4l2_close(struct file *filp)
static int cx231xx_close(struct file *filp)
{
struct cx231xx_fh *fh = filp->private_data;
struct cx231xx *dev = fh->dev;
@ -2355,6 +2360,18 @@ static int cx231xx_v4l2_close(struct file *filp)
return 0;
}
static int cx231xx_v4l2_close(struct file *filp)
{
struct cx231xx_fh *fh = filp->private_data;
struct cx231xx *dev = fh->dev;
int rc;
mutex_lock(&dev->lock);
rc = cx231xx_close(filp);
mutex_unlock(&dev->lock);
return rc;
}
/*
* cx231xx_v4l2_read()
* will allocate buffers when called for the first time
@ -2378,8 +2395,12 @@ cx231xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
if (unlikely(rc < 0))
return rc;
return videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
if (mutex_lock_interruptible(&dev->lock))
return -ERESTARTSYS;
rc = videobuf_read_stream(&fh->vb_vidq, buf, count, pos, 0,
filp->f_flags & O_NONBLOCK);
mutex_unlock(&dev->lock);
return rc;
}
return 0;
}
@ -2404,10 +2425,15 @@ static unsigned int cx231xx_v4l2_poll(struct file *filp, poll_table *wait)
return POLLERR;
if ((V4L2_BUF_TYPE_VIDEO_CAPTURE == fh->type) ||
(V4L2_BUF_TYPE_VBI_CAPTURE == fh->type))
return videobuf_poll_stream(filp, &fh->vb_vidq, wait);
else
return POLLERR;
(V4L2_BUF_TYPE_VBI_CAPTURE == fh->type)) {
unsigned int res;
mutex_lock(&dev->lock);
res = videobuf_poll_stream(filp, &fh->vb_vidq, wait);
mutex_unlock(&dev->lock);
return res;
}
return POLLERR;
}
/*
@ -2428,7 +2454,10 @@ static int cx231xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
if (unlikely(rc < 0))
return rc;
if (mutex_lock_interruptible(&dev->lock))
return -ERESTARTSYS;
rc = videobuf_mmap_mapper(&fh->vb_vidq, vma);
mutex_unlock(&dev->lock);
cx231xx_videodbg("vma start=0x%08lx, size=%ld, ret=%d\n",
(unsigned long)vma->vm_start,
@ -2545,10 +2574,6 @@ static struct video_device *cx231xx_vdev_init(struct cx231xx *dev,
vfd->release = video_device_release;
vfd->debug = video_debug;
vfd->lock = &dev->lock;
/* Locking in file operations other than ioctl should be done
by the driver, not the V4L2 core.
This driver needs auditing so that this flag can be removed. */
set_bit(V4L2_FL_LOCK_ALL_FOPS, &vfd->flags);
snprintf(vfd->name, sizeof(vfd->name), "%s %s", dev->name, type_name);