diff options
| -rw-r--r-- | drivers/media/video/cx231xx/cx231xx-video.c | 47 |
1 files changed, 36 insertions, 11 deletions
diff --git a/drivers/media/video/cx231xx/cx231xx-video.c b/drivers/media/video/cx231xx/cx231xx-video.c index 523aa49d6b86..790b28d7f764 100644 --- a/drivers/media/video/cx231xx/cx231xx-video.c +++ b/drivers/media/video/cx231xx/cx231xx-video.c @@ -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); |