diff options
Diffstat (limited to 'drivers/sbus/char/uctrl.c')
| -rw-r--r-- | drivers/sbus/char/uctrl.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/sbus/char/uctrl.c b/drivers/sbus/char/uctrl.c index 5f253665a1d..079da4cb45a 100644 --- a/drivers/sbus/char/uctrl.c +++ b/drivers/sbus/char/uctrl.c @@ -9,7 +9,7 @@ #include <linux/delay.h> #include <linux/interrupt.h> #include <linux/slab.h> -#include <linux/smp_lock.h> +#include <linux/mutex.h> #include <linux/ioport.h> #include <linux/init.h> #include <linux/miscdevice.h> @@ -72,6 +72,7 @@ struct ts102_regs { #define UCTRL_STAT_RXNE_STA 0x04 /* receive FIFO not empty status */ #define UCTRL_STAT_RXO_STA 0x08 /* receive FIFO overflow status */ +static DEFINE_MUTEX(uctrl_mutex); static const char *uctrl_extstatus[16] = { "main power available", "internal battery attached", @@ -210,10 +211,10 @@ uctrl_ioctl(struct file *file, unsigned int cmd, unsigned long arg) static int uctrl_open(struct inode *inode, struct file *file) { - lock_kernel(); + mutex_lock(&uctrl_mutex); uctrl_get_event_status(global_driver); uctrl_get_external_status(global_driver); - unlock_kernel(); + mutex_unlock(&uctrl_mutex); return 0; } |