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Commit 28fbbf49 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Jonathan Corbet
Browse files

jsflash: BKL pushdown 



Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent cddf63d9

drivers/sbus/char/jsflash.c

+10 −3
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
 */



#include <linux/module.h>

#include <linux/smp_lock.h>

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/miscdevice.h>
@@ -417,11 +418,17 @@ static int jsf_mmap(struct file * file, struct vm_area_struct * vma) 


static int jsf_open(struct inode * inode, struct file * filp)

{



	if (jsf0.base == 0) return -ENXIO;

	if (test_and_set_bit(0, (void *)&jsf0.busy) != 0)

	lock_kernel();

	if (jsf0.base == 0) {

		unlock_kernel();

		return -ENXIO;

	}

	if (test_and_set_bit(0, (void *)&jsf0.busy) != 0) {

		unlock_kernel();

		return -EBUSY;

	}



	unlock_kernel();

	return 0;	/* XXX What security? */

}