diff options
Diffstat (limited to 'drivers/char/watchdog/w83627hf_wdt.c')
| -rw-r--r-- | drivers/char/watchdog/w83627hf_wdt.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/char/watchdog/w83627hf_wdt.c b/drivers/char/watchdog/w83627hf_wdt.c index 13f16d41c2fd..07d4bff27226 100644 --- a/drivers/char/watchdog/w83627hf_wdt.c +++ b/drivers/char/watchdog/w83627hf_wdt.c @@ -33,6 +33,7 @@ #include <linux/notifier.h> #include <linux/reboot.h> #include <linux/init.h> +#include <linux/spinlock.h> #include <asm/io.h> #include <asm/uaccess.h> @@ -44,6 +45,7 @@ static unsigned long wdt_is_open; static char expect_close; +static spinlock_t io_lock; /* You must set this - there is no sane way to probe for this board. */ static int wdt_io = 0x2E; @@ -110,12 +112,16 @@ w83627hf_init(void) static void wdt_ctrl(int timeout) { + spin_lock(&io_lock); + w83627hf_select_wd_register(); outb_p(0xF6, WDT_EFER); /* Select CRF6 */ outb_p(timeout, WDT_EFDR); /* Write Timeout counter to CRF6 */ w83627hf_unselect_wd_register(); + + spin_unlock(&io_lock); } static int @@ -223,7 +229,7 @@ wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, } default: - return -ENOIOCTLCMD; + return -ENOTTY; } return 0; } @@ -303,6 +309,8 @@ wdt_init(void) { int ret; + spin_lock_init(&io_lock); + printk(KERN_INFO "WDT driver for the Winbond(TM) W83627HF Super I/O chip initialising.\n"); if (wdt_set_heartbeat(timeout)) { |