Commit 9aaf20cb authored by Jonathan Corbet's avatar Jonathan Corbet
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videopix: BKL pushdown 



Add explicit lock_kernel() calls to vfc_open().

Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent 5e9829ad

drivers/sbus/char/vfc_dev.c

+5 −0
Original line number Diff line number Diff line
@@ -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;

}