videopix: BKL pushdown
Add explicit lock_kernel() calls to vfc_open(). Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This commit is contained in:
parent
5e9829ad38
commit
9aaf20cbf5
|
@ -24,6 +24,7 @@
|
|||
#include <linux/spinlock.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/mm.h>
|
||||
#include <linux/smp_lock.h>
|
||||
|
||||
#include <asm/openprom.h>
|
||||
#include <asm/oplib.h>
|
||||
|
@ -178,14 +179,17 @@ static int vfc_open(struct inode *inode, struct file *file)
|
|||
{
|
||||
struct vfc_dev *dev;
|
||||
|
||||
lock_kernel();
|
||||
spin_lock(&vfc_dev_lock);
|
||||
dev = vfc_get_dev_ptr(iminor(inode));
|
||||
if (dev == NULL) {
|
||||
spin_unlock(&vfc_dev_lock);
|
||||
unlock_kernel();
|
||||
return -ENODEV;
|
||||
}
|
||||
if (dev->busy) {
|
||||
spin_unlock(&vfc_dev_lock);
|
||||
unlock_kernel();
|
||||
return -EBUSY;
|
||||
}
|
||||
|
||||
|
@ -202,6 +206,7 @@ static int vfc_open(struct inode *inode, struct file *file)
|
|||
vfc_captstat_reset(dev);
|
||||
|
||||
vfc_unlock_device(dev);
|
||||
unlock_kernel();
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
Loading…
Reference in a new issue