diff options
Diffstat (limited to 'drivers/char/watchdog/advantechwdt.c')
| -rw-r--r-- | drivers/char/watchdog/advantechwdt.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/drivers/char/watchdog/advantechwdt.c b/drivers/char/watchdog/advantechwdt.c index 6c919797591..216af0d67fd 100644 --- a/drivers/char/watchdog/advantechwdt.c +++ b/drivers/char/watchdog/advantechwdt.c @@ -95,6 +95,16 @@ advwdt_disable(void) inb_p(wdt_stop); } +static int +advwdt_set_heartbeat(int t) +{ + if ((t < 1) || (t > 63)) + return -EINVAL; + + timeout = t; + return 0; +} + /* * /dev/watchdog handling */ @@ -151,9 +161,8 @@ advwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, case WDIOC_SETTIMEOUT: if (get_user(new_timeout, p)) return -EFAULT; - if ((new_timeout < 1) || (new_timeout > 63)) + if (advwdt_set_heartbeat(new_timeout)) return -EINVAL; - timeout = new_timeout; advwdt_ping(); /* Fall */ @@ -267,12 +276,6 @@ advwdt_init(void) printk(KERN_INFO "WDT driver for Advantech single board computer initialising.\n"); - if (timeout < 1 || timeout > 63) { - timeout = WATCHDOG_TIMEOUT; - printk (KERN_INFO PFX "timeout value must be 1<=x<=63, using %d\n", - timeout); - } - if (wdt_stop != wdt_start) { if (!request_region(wdt_stop, 1, WATCHDOG_NAME)) { printk (KERN_ERR PFX "I/O address 0x%04x already in use\n", @@ -289,6 +292,13 @@ advwdt_init(void) goto unreg_stop; } + /* Check that the heartbeat value is within it's range ; if not reset to the default */ + if (advwdt_set_heartbeat(timeout)) { + advwdt_set_heartbeat(WATCHDOG_TIMEOUT); + printk (KERN_INFO PFX "timeout value must be 1<=x<=63, using %d\n", + timeout); + } + ret = register_reboot_notifier(&advwdt_notifier); if (ret != 0) { printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", |