diff options
| -rw-r--r-- | drivers/char/watchdog/ib700wdt.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/drivers/char/watchdog/ib700wdt.c b/drivers/char/watchdog/ib700wdt.c index 3cec6790893..be61e475589 100644 --- a/drivers/char/watchdog/ib700wdt.c +++ b/drivers/char/watchdog/ib700wdt.c @@ -128,14 +128,20 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" _ static void ibwdt_ping(void) { + spin_lock(&ibwdt_lock); + /* Write a watchdog value */ outb_p(wd_margin, WDT_START); + + spin_unlock(&ibwdt_lock); } static void ibwdt_disable(void) { + spin_lock(&ibwdt_lock); outb_p(0, WDT_STOP); + spin_unlock(&ibwdt_lock); } static int @@ -218,7 +224,26 @@ ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, case WDIOC_GETTIMEOUT: return put_user(wd_times[wd_margin], p); - break; + + case WDIOC_SETOPTIONS: + { + int options, retval = -EINVAL; + + if (get_user(options, p)) + return -EFAULT; + + if (options & WDIOS_DISABLECARD) { + ibwdt_disable(); + retval = 0; + } + + if (options & WDIOS_ENABLECARD) { + ibwdt_ping(); + retval = 0; + } + + return retval; + } default: return -ENOTTY; @@ -229,9 +254,7 @@ ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, static int ibwdt_open(struct inode *inode, struct file *file) { - spin_lock(&ibwdt_lock); if (test_and_set_bit(0, &ibwdt_is_open)) { - spin_unlock(&ibwdt_lock); return -EBUSY; } if (nowayout) @@ -239,14 +262,12 @@ ibwdt_open(struct inode *inode, struct file *file) /* Activate */ ibwdt_ping(); - spin_unlock(&ibwdt_lock); return nonseekable_open(inode, file); } static int ibwdt_close(struct inode *inode, struct file *file) { - spin_lock(&ibwdt_lock); if (expect_close == 42) { ibwdt_disable(); } else { @@ -255,7 +276,6 @@ ibwdt_close(struct inode *inode, struct file *file) } clear_bit(0, &ibwdt_is_open); expect_close = 0; - spin_unlock(&ibwdt_lock); return 0; } |