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[media] v4l2-dev.c: also add debug support for the fops

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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 2012-06-09 12:13:29 -03:00 • committed by Mauro Carvalho Chehab
parent 2e90c6c38a
commit cc4b7e7f57
1 changed files with 24 additions and 1 deletions
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25
drivers/media/video/v4l2-dev.c
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@ -305,6 +305,9 @@ static ssize_t v4l2_read(struct file *filp, char __user *buf,
ret = vdev->fops->read(filp, buf, sz, off); ret = vdev->fops->read(filp, buf, sz, off);
if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
mutex_unlock(vdev->lock); mutex_unlock(vdev->lock);
if (vdev->debug)
printk(KERN_DEBUG "%s: read: %zd (%d)\n",
video_device_node_name(vdev), sz, ret);
return ret; return ret;
} }
@ -323,6 +326,9 @@ static ssize_t v4l2_write(struct file *filp, const char __user *buf,
ret = vdev->fops->write(filp, buf, sz, off); ret = vdev->fops->write(filp, buf, sz, off);
if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
mutex_unlock(vdev->lock); mutex_unlock(vdev->lock);
if (vdev->debug)
printk(KERN_DEBUG "%s: write: %zd (%d)\n",
video_device_node_name(vdev), sz, ret);
return ret; return ret;
} }
@ -339,6 +345,9 @@ static unsigned int v4l2_poll(struct file *filp, struct poll_table_struct *poll)
ret = vdev->fops->poll(filp, poll); ret = vdev->fops->poll(filp, poll);
if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
mutex_unlock(vdev->lock); mutex_unlock(vdev->lock);
if (vdev->debug)
printk(KERN_DEBUG "%s: poll: %08x\n",
video_device_node_name(vdev), ret);
return ret; return ret;
} }
@ -403,12 +412,17 @@ static unsigned long v4l2_get_unmapped_area(struct file *filp,
unsigned long flags) unsigned long flags)
{ {
struct video_device *vdev = video_devdata(filp); struct video_device *vdev = video_devdata(filp);
int ret;
if (!vdev->fops->get_unmapped_area) if (!vdev->fops->get_unmapped_area)
return -ENOSYS; return -ENOSYS;
if (!video_is_registered(vdev)) if (!video_is_registered(vdev))
return -ENODEV; return -ENODEV;
return vdev->fops->get_unmapped_area(filp, addr, len, pgoff, flags); ret = vdev->fops->get_unmapped_area(filp, addr, len, pgoff, flags);
if (vdev->debug)
printk(KERN_DEBUG "%s: get_unmapped_area (%d)\n",
video_device_node_name(vdev), ret);
return ret;
} }
#endif #endif
@ -426,6 +440,9 @@ static int v4l2_mmap(struct file *filp, struct vm_area_struct *vm)
ret = vdev->fops->mmap(filp, vm); ret = vdev->fops->mmap(filp, vm);
if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags))
mutex_unlock(vdev->lock); mutex_unlock(vdev->lock);
if (vdev->debug)
printk(KERN_DEBUG "%s: mmap (%d)\n",
video_device_node_name(vdev), ret);
return ret; return ret;
} }
@ -464,6 +481,9 @@ err:
/* decrease the refcount in case of an error */ /* decrease the refcount in case of an error */
if (ret) if (ret)
video_put(vdev); video_put(vdev);
if (vdev->debug)
printk(KERN_DEBUG "%s: open (%d)\n",
video_device_node_name(vdev), ret);
return ret; return ret;
} }
@ -483,6 +503,9 @@ static int v4l2_release(struct inode *inode, struct file *filp)
/* decrease the refcount unconditionally since the release() /* decrease the refcount unconditionally since the release()
return value is ignored. */ return value is ignored. */
video_put(vdev); video_put(vdev);
if (vdev->debug)
printk(KERN_DEBUG "%s: release\n",
video_device_node_name(vdev));
return ret; return ret;
} }