diff options
| -rw-r--r-- | drivers/media/video/s5p-tv/mixer_video.c | 29 |
1 files changed, 21 insertions, 8 deletions
diff --git a/drivers/media/video/s5p-tv/mixer_video.c b/drivers/media/video/s5p-tv/mixer_video.c index 6c74b05d1f9..e0e02cce1bc 100644 --- a/drivers/media/video/s5p-tv/mixer_video.c +++ b/drivers/media/video/s5p-tv/mixer_video.c @@ -750,18 +750,20 @@ static int mxr_video_open(struct file *file) int ret = 0; mxr_dbg(mdev, "%s:%d\n", __func__, __LINE__); + if (mutex_lock_interruptible(&layer->mutex)) + return -ERESTARTSYS; /* assure device probe is finished */ wait_for_device_probe(); /* creating context for file descriptor */ ret = v4l2_fh_open(file); if (ret) { mxr_err(mdev, "v4l2_fh_open failed\n"); - return ret; + goto unlock; } /* leaving if layer is already initialized */ if (!v4l2_fh_is_singular_file(file)) - return 0; + goto unlock; /* FIXME: should power be enabled on open? */ ret = mxr_power_get(mdev); @@ -779,6 +781,7 @@ static int mxr_video_open(struct file *file) layer->fmt = layer->fmt_array[0]; /* setup default geometry */ mxr_layer_default_geo(layer); + mutex_unlock(&layer->mutex); return 0; @@ -788,6 +791,9 @@ fail_power: fail_fh_open: v4l2_fh_release(file); +unlock: + mutex_unlock(&layer->mutex); + return ret; } @@ -795,19 +801,28 @@ static unsigned int mxr_video_poll(struct file *file, struct poll_table_struct *wait) { struct mxr_layer *layer = video_drvdata(file); + unsigned int res; mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__); - return vb2_poll(&layer->vb_queue, file, wait); + mutex_lock(&layer->mutex); + res = vb2_poll(&layer->vb_queue, file, wait); + mutex_unlock(&layer->mutex); + return res; } static int mxr_video_mmap(struct file *file, struct vm_area_struct *vma) { struct mxr_layer *layer = video_drvdata(file); + int ret; mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__); - return vb2_mmap(&layer->vb_queue, vma); + if (mutex_lock_interruptible(&layer->mutex)) + return -ERESTARTSYS; + ret = vb2_mmap(&layer->vb_queue, vma); + mutex_unlock(&layer->mutex); + return ret; } static int mxr_video_release(struct file *file) @@ -815,11 +830,13 @@ static int mxr_video_release(struct file *file) struct mxr_layer *layer = video_drvdata(file); mxr_dbg(layer->mdev, "%s:%d\n", __func__, __LINE__); + mutex_lock(&layer->mutex); if (v4l2_fh_is_singular_file(file)) { vb2_queue_release(&layer->vb_queue); mxr_power_put(layer->mdev); } v4l2_fh_release(file); + mutex_unlock(&layer->mutex); return 0; } @@ -1069,10 +1086,6 @@ struct mxr_layer *mxr_base_layer_create(struct mxr_device *mdev, set_bit(V4L2_FL_USE_FH_PRIO, &layer->vfd.flags); video_set_drvdata(&layer->vfd, layer); - /* 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, &layer->vfd.flags); layer->vfd.lock = &layer->mutex; layer->vfd.v4l2_dev = &mdev->v4l2_dev; |