diff options
| -rw-r--r-- | drivers/media/video/soc_camera.c | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/drivers/media/video/soc_camera.c b/drivers/media/video/soc_camera.c index b03ffecb7438..9758217470f0 100644 --- a/drivers/media/video/soc_camera.c +++ b/drivers/media/video/soc_camera.c @@ -507,9 +507,12 @@ static int soc_camera_open(struct file *file) ici = to_soc_camera_host(icd->parent); + if (mutex_lock_interruptible(&icd->video_lock)) + return -ERESTARTSYS; if (!try_module_get(ici->ops->owner)) { dev_err(icd->pdev, "Couldn't lock capture bus driver.\n"); - return -EINVAL; + ret = -EINVAL; + goto emodule; } icd->use_count++; @@ -570,6 +573,7 @@ static int soc_camera_open(struct file *file) } v4l2_ctrl_handler_setup(&icd->ctrl_handler); } + mutex_unlock(&icd->video_lock); file->private_data = icd; dev_dbg(icd->pdev, "camera device open\n"); @@ -590,6 +594,8 @@ epower: eiciadd: icd->use_count--; module_put(ici->ops->owner); +emodule: + mutex_unlock(&icd->video_lock); return ret; } @@ -599,6 +605,7 @@ static int soc_camera_close(struct file *file) struct soc_camera_device *icd = file->private_data; struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + mutex_lock(&icd->video_lock); icd->use_count--; if (!icd->use_count) { struct soc_camera_link *icl = to_soc_camera_link(icd); @@ -615,6 +622,7 @@ static int soc_camera_close(struct file *file) if (icd->streamer == file) icd->streamer = NULL; + mutex_unlock(&icd->video_lock); module_put(ici->ops->owner); @@ -645,10 +653,13 @@ static int soc_camera_mmap(struct file *file, struct vm_area_struct *vma) if (icd->streamer != file) return -EBUSY; + if (mutex_lock_interruptible(&icd->video_lock)) + return -ERESTARTSYS; if (ici->ops->init_videobuf) err = videobuf_mmap_mapper(&icd->vb_vidq, vma); else err = vb2_mmap(&icd->vb2_vidq, vma); + mutex_unlock(&icd->video_lock); dev_dbg(icd->pdev, "vma start=0x%08lx, size=%ld, ret=%d\n", (unsigned long)vma->vm_start, @@ -662,16 +673,18 @@ static unsigned int soc_camera_poll(struct file *file, poll_table *pt) { struct soc_camera_device *icd = file->private_data; struct soc_camera_host *ici = to_soc_camera_host(icd->parent); + unsigned res = POLLERR; if (icd->streamer != file) - return -EBUSY; - - if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) { - dev_err(icd->pdev, "Trying to poll with no queued buffers!\n"); return POLLERR; - } - return ici->ops->poll(file, pt); + mutex_lock(&icd->video_lock); + if (ici->ops->init_videobuf && list_empty(&icd->vb_vidq.stream)) + dev_err(icd->pdev, "Trying to poll with no queued buffers!\n"); + else + res = ici->ops->poll(file, pt); + mutex_unlock(&icd->video_lock); + return res; } void soc_camera_lock(struct vb2_queue *vq) @@ -1432,10 +1445,6 @@ static int video_dev_create(struct soc_camera_device *icd) vdev->tvnorms = V4L2_STD_UNKNOWN; vdev->ctrl_handler = &icd->ctrl_handler; vdev->lock = &icd->video_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, &vdev->flags); icd->vdev = vdev; |