diff options
Diffstat (limited to 'drivers/char/watchdog/sbc_epx_c3.c')
| -rw-r--r-- | drivers/char/watchdog/sbc_epx_c3.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/char/watchdog/sbc_epx_c3.c b/drivers/char/watchdog/sbc_epx_c3.c index 951764614eb..7a4dfb95d08 100644 --- a/drivers/char/watchdog/sbc_epx_c3.c +++ b/drivers/char/watchdog/sbc_epx_c3.c @@ -25,6 +25,7 @@ #include <linux/notifier.h> #include <linux/reboot.h> #include <linux/init.h> +#include <linux/ioport.h> #include <asm/uaccess.h> #include <asm/io.h> @@ -181,11 +182,14 @@ static int __init watchdog_init(void) { int ret; + if (!request_region(EPXC3_WATCHDOG_CTL_REG, 2, "epxc3_watchdog")) + return -EBUSY; + ret = register_reboot_notifier(&epx_c3_notifier); if (ret) { printk(KERN_ERR PFX "cannot register reboot notifier " "(err=%d)\n", ret); - return ret; + goto out; } ret = misc_register(&epx_c3_miscdev); @@ -193,18 +197,23 @@ static int __init watchdog_init(void) printk(KERN_ERR PFX "cannot register miscdev on minor=%d " "(err=%d)\n", WATCHDOG_MINOR, ret); unregister_reboot_notifier(&epx_c3_notifier); - return ret; + goto out; } printk(banner); return 0; + +out: + release_region(EPXC3_WATCHDOG_CTL_REG, 2); + return ret; } static void __exit watchdog_exit(void) { misc_deregister(&epx_c3_miscdev); unregister_reboot_notifier(&epx_c3_notifier); + release_region(EPXC3_WATCHDOG_CTL_REG, 2); } module_init(watchdog_init); |