From cc4b7e7f5755d304ffbfc1d44c11ba8e981347b0 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Sat, 9 Jun 2012 12:13:29 -0300 Subject: [PATCH] [media] v4l2-dev.c: also add debug support for the fops Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/v4l2-dev.c | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c index b82778174eef..d13c47fc7202 100644 --- a/drivers/media/video/v4l2-dev.c +++ b/drivers/media/video/v4l2-dev.c @@ -305,6 +305,9 @@ static ssize_t v4l2_read(struct file *filp, char __user *buf, 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); 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); 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); 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); if (test_bit(V4L2_FL_LOCK_ALL_FOPS, &vdev->flags)) mutex_unlock(vdev->lock); + if (vdev->debug) + printk(KERN_DEBUG "%s: poll: %08x\n", + video_device_node_name(vdev), ret); return ret; } @@ -403,12 +412,17 @@ static unsigned long v4l2_get_unmapped_area(struct file *filp, unsigned long flags) { struct video_device *vdev = video_devdata(filp); + int ret; if (!vdev->fops->get_unmapped_area) return -ENOSYS; if (!video_is_registered(vdev)) 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 @@ -426,6 +440,9 @@ static int v4l2_mmap(struct file *filp, struct vm_area_struct *vm) 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); return ret; } @@ -464,6 +481,9 @@ err: /* decrease the refcount in case of an error */ if (ret) video_put(vdev); + if (vdev->debug) + printk(KERN_DEBUG "%s: open (%d)\n", + video_device_node_name(vdev), ret); return ret; } @@ -483,6 +503,9 @@ static int v4l2_release(struct inode *inode, struct file *filp) /* decrease the refcount unconditionally since the release() return value is ignored. */ video_put(vdev); + if (vdev->debug) + printk(KERN_DEBUG "%s: release\n", + video_device_node_name(vdev)); return ret; } -- 2.20.1