Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 556889a4 authored by Arnd Bergmann's avatar Arnd Bergmann Committed by Jonathan Corbet
Browse files

briq_panel: BKL pushdown 



Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent 8324af6d

drivers/char/briq_panel.c

+7 −2
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 


#include <linux/module.h>



#include <linux/smp_lock.h>

#include <linux/types.h>

#include <linux/errno.h>

#include <linux/tty.h>
@@ -67,11 +68,15 @@ static void set_led(char state) 


static int briq_panel_open(struct inode *ino, struct file *filep)

{

	/* enforce single access */

	if (vfd_is_open)

	lock_kernel();

	/* enforce single access, vfd_is_open is protected by BKL */

	if (vfd_is_open) {

		unlock_kernel();

		return -EBUSY;

	}

	vfd_is_open = 1;



	unlock_kernel();

	return 0;

}