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-rw-r--r--drivers/media/video/v4l2-dev.c51
-rw-r--r--drivers/media/video/videobuf2-core.c21
-rw-r--r--include/media/v4l2-dev.h3
3 files changed, 15 insertions, 60 deletions
diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index 07aeafca9eaa..71237f5f85f4 100644
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -298,13 +298,8 @@ static ssize_t v4l2_read(struct file *filp, char __user *buf,
if (!vdev->fops->read)
return -EINVAL;
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags) &&
- mutex_lock_interruptible(vdev->lock))
- return -ERESTARTSYS;
if (video_is_registered(vdev))
ret = vdev->fops->read(filp, buf, sz, off);
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
- mutex_unlock(vdev->lock);
if (vdev->debug)
printk(KERN_DEBUG "%s: read: %zd (%d)\n",
video_device_node_name(vdev), sz, ret);
@@ -319,13 +314,8 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf,
if (!vdev->fops->write)
return -EINVAL;
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags) &&
- mutex_lock_interruptible(vdev->lock))
- return -ERESTARTSYS;
if (video_is_registered(vdev))
ret = vdev->fops->write(filp, buf, sz, off);
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
- mutex_unlock(vdev->lock);
if (vdev->debug)
printk(KERN_DEBUG "%s: write: %zd (%d)\n",
video_device_node_name(vdev), sz, ret);
@@ -335,20 +325,16 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf,
static unsigned int v4l2_poll(struct file *filp, struct poll_table_struct *poll)
{
struct video_device *vdev = video_devdata(filp);
- int ret = POLLERR | POLLHUP;
+ unsigned int res = POLLERR | POLLHUP;
if (!vdev->fops->poll)
return DEFAULT_POLLMASK;
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
- mutex_lock(vdev->lock);
if (video_is_registered(vdev))
- ret = vdev->fops->poll(filp, poll);
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
- mutex_unlock(vdev->lock);
+ res = vdev->fops->poll(filp, poll);
if (vdev->debug)
printk(KERN_DEBUG "%s: poll: %08x\n",
- video_device_node_name(vdev), ret);
- return ret;
+ video_device_node_name(vdev), res);
+ return res;
}
static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
@@ -432,14 +418,9 @@ static int v4l2_mmap(struct file *filp, struct vm_area_struct *vm)
int ret = -ENODEV;
if (!vdev->fops->mmap)
- return ret;
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags) &&
- mutex_lock_interruptible(vdev->lock))
- return -ERESTARTSYS;
+ return -ENODEV;
if (video_is_registered(vdev))
ret = vdev->fops->mmap(filp, vm);
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
- mutex_unlock(vdev->lock);
if (vdev->debug)
printk(KERN_DEBUG "%s: mmap (%d)\n",
video_device_node_name(vdev), ret);
@@ -464,20 +445,12 @@ static int v4l2_open(struct inode *inode, struct file *filp)
video_get(vdev);
mutex_unlock(&videodev_lock);
if (vdev->fops->open) {
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags) &&
- mutex_lock_interruptible(vdev->lock)) {
- ret = -ERESTARTSYS;
- goto err;
- }
if (video_is_registered(vdev))
ret = vdev->fops->open(filp);
else
ret = -ENODEV;
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
- mutex_unlock(vdev->lock);
}
-err:
if (vdev->debug)
printk(KERN_DEBUG "%s: open (%d)\n",
video_device_node_name(vdev), ret);
@@ -493,16 +466,12 @@ static int v4l2_release(struct inode *inode, struct file *filp)
struct video_device *vdev = video_devdata(filp);
int ret = 0;
- if (vdev->fops->release) {
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
- mutex_lock(vdev->lock);
- vdev->fops->release(filp);
- if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
- mutex_unlock(vdev->lock);
- }
+ if (vdev->fops->release)
+ ret = vdev->fops->release(filp);
if (vdev->debug)
printk(KERN_DEBUG "%s: release\n",
video_device_node_name(vdev));
+
/* decrease the refcount unconditionally since the release()
return value is ignored. */
video_put(vdev);
@@ -882,10 +851,6 @@ int __video_register_device(struct video_device *vdev, int type, int nr,
WARN_ON(video_device[vdev->minor] != NULL);
vdev->index = get_index(vdev);
mutex_unlock(&videodev_lock);
- /* if no lock was passed, then make sure the LOCK_ALL_FOPS bit is
- clear and warn if it wasn't. */
- if (vdev->lock == NULL)
- WARN_ON(test_and_clear_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags));
if (vdev->ioctl_ops)
determine_valid_ioctls(vdev);
diff --git a/drivers/media/video/videobuf2-core.c b/drivers/media/video/videobuf2-core.c
index 268c7dd4f823..4da3df61901f 100644
--- a/drivers/media/video/videobuf2-core.c
+++ b/drivers/media/video/videobuf2-core.c
@@ -2270,10 +2270,9 @@ ssize_t vb2_fop_write(struct file *file, char __user *buf,
{
struct video_device *vdev = video_devdata(file);
struct mutex *lock = vdev->queue->lock ? vdev->queue->lock : vdev->lock;
- bool must_lock = !test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags) && lock;
int err = -EBUSY;
- if (must_lock && mutex_lock_interruptible(lock))
+ if (lock && mutex_lock_interruptible(lock))
return -ERESTARTSYS;
if (vb2_queue_is_busy(vdev, file))
goto exit;
@@ -2282,7 +2281,7 @@ ssize_t vb2_fop_write(struct file *file, char __user *buf,
if (err >= 0)
vdev->queue->owner = file->private_data;
exit:
- if (must_lock)
+ if (lock)
mutex_unlock(lock);
return err;
}
@@ -2293,10 +2292,9 @@ ssize_t vb2_fop_read(struct file *file, char __user *buf,
{
struct video_device *vdev = video_devdata(file);
struct mutex *lock = vdev->queue->lock ? vdev->queue->lock : vdev->lock;
- bool must_lock = !test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags) && vdev->lock;
int err = -EBUSY;
- if (must_lock && mutex_lock_interruptible(lock))
+ if (lock && mutex_lock_interruptible(lock))
return -ERESTARTSYS;
if (vb2_queue_is_busy(vdev, file))
goto exit;
@@ -2305,7 +2303,7 @@ ssize_t vb2_fop_read(struct file *file, char __user *buf,
if (err >= 0)
vdev->queue->owner = file->private_data;
exit:
- if (must_lock)
+ if (lock)
mutex_unlock(lock);
return err;
}
@@ -2319,11 +2317,6 @@ unsigned int vb2_fop_poll(struct file *file, poll_table *wait)
unsigned long req_events = poll_requested_events(wait);
unsigned res;
void *fileio;
- /* Yuck. We really need to get rid of this flag asap. If it is
- set, then the core took the serialization lock before calling
- poll(). This is being phased out, but for now we have to handle
- this case. */
- bool locked = test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags);
bool must_lock = false;
/* Try to be smart: only lock if polling might start fileio,
@@ -2339,9 +2332,9 @@ unsigned int vb2_fop_poll(struct file *file, poll_table *wait)
/* If locking is needed, but this helper doesn't know how, then you
shouldn't be using this helper but you should write your own. */
- WARN_ON(must_lock && !locked && !lock);
+ WARN_ON(must_lock && !lock);
- if (must_lock && !locked && lock && mutex_lock_interruptible(lock))
+ if (must_lock && lock && mutex_lock_interruptible(lock))
return POLLERR;
fileio = q->fileio;
@@ -2351,7 +2344,7 @@ unsigned int vb2_fop_poll(struct file *file, poll_table *wait)
/* If fileio was started, then we have a new queue owner. */
if (must_lock && !fileio && q->fileio)
q->owner = file->private_data;
- if (must_lock && !locked && lock)
+ if (must_lock && lock)
mutex_unlock(lock);
return res;
}
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index 5c416cdc88d5..6ee8897c47e9 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -39,9 +39,6 @@ struct v4l2_ctrl_handler;
#define V4L2_FL_USES_V4L2_FH (1)
/* Use the prio field of v4l2_fh for core priority checking */
#define V4L2_FL_USE_FH_PRIO (2)
-/* If ioctl core locking is in use, then apply that also to all
- file operations. Don't use this flag in new drivers! */
-#define V4L2_FL_LOCK_ALL_FOPS (3)
/* Priority helper functions */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-16 22:25:55 +0000