diff options
| -rw-r--r-- | drivers/misc/sony-laptop.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/misc/sony-laptop.c b/drivers/misc/sony-laptop.c index 00e48e2a9c1..60775be2282 100644 --- a/drivers/misc/sony-laptop.c +++ b/drivers/misc/sony-laptop.c @@ -46,6 +46,7 @@ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/init.h> +#include <linux/smp_lock.h> #include <linux/types.h> #include <linux/backlight.h> #include <linux/platform_device.h> @@ -1927,8 +1928,10 @@ static int sonypi_misc_release(struct inode *inode, struct file *file) static int sonypi_misc_open(struct inode *inode, struct file *file) { /* Flush input queue on first open */ + lock_kernel(); if (atomic_inc_return(&sonypi_compat.open_count) == 1) kfifo_reset(sonypi_compat.fifo); + unlock_kernel(); return 0; } |