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[media] s5p-tv: 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 07:02:01 -03:00 committed by Mauro Carvalho Chehab
parent de40cb227d
commit 00ccdc3c33
1 changed files with 21 additions and 8 deletions
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29
drivers/media/video/s5p-tv/mixer_video.c
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@ -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 @@ static int mxr_video_open(struct file *file)
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;