diff options
Diffstat (limited to 'drivers/watchdog/softdog.c')
| -rw-r--r-- | drivers/watchdog/softdog.c | 87 |
1 files changed, 46 insertions, 41 deletions
diff --git a/drivers/watchdog/softdog.c b/drivers/watchdog/softdog.c index 9c3694909243..bb3c75eed9df 100644 --- a/drivers/watchdog/softdog.c +++ b/drivers/watchdog/softdog.c @@ -47,19 +47,22 @@ #include <linux/reboot.h> #include <linux/init.h> #include <linux/jiffies.h> - -#include <asm/uaccess.h> +#include <linux/uaccess.h> #define PFX "SoftDog: " #define TIMER_MARGIN 60 /* Default is 60 seconds */ static int soft_margin = TIMER_MARGIN; /* in seconds */ module_param(soft_margin, int, 0); -MODULE_PARM_DESC(soft_margin, "Watchdog soft_margin in seconds. (0<soft_margin<65536, default=" __MODULE_STRING(TIMER_MARGIN) ")"); +MODULE_PARM_DESC(soft_margin, + "Watchdog soft_margin in seconds. (0 < soft_margin < 65536, default=" + __MODULE_STRING(TIMER_MARGIN) ")"); static int nowayout = WATCHDOG_NOWAYOUT; module_param(nowayout, int, 0); -MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +MODULE_PARM_DESC(nowayout, + "Watchdog cannot be stopped once started (default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); #ifdef ONLY_TESTING static int soft_noboot = 1; @@ -93,8 +96,7 @@ static void watchdog_fire(unsigned long data) if (soft_noboot) printk(KERN_CRIT PFX "Triggered - Reboot ignored.\n"); - else - { + else { printk(KERN_CRIT PFX "Initiating system reboot.\n"); emergency_restart(); printk(KERN_CRIT PFX "Reboot didn't ?????\n"); @@ -153,7 +155,8 @@ static int softdog_release(struct inode *inode, struct file *file) softdog_stop(); module_put(THIS_MODULE); } else { - printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n"); + printk(KERN_CRIT PFX + "Unexpected close, not stopping watchdog!\n"); set_bit(0, &orphan_timer); softdog_keepalive(); } @@ -162,12 +165,13 @@ static int softdog_release(struct inode *inode, struct file *file) return 0; } -static ssize_t softdog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos) +static ssize_t softdog_write(struct file *file, const char __user *data, + size_t len, loff_t *ppos) { /* * Refresh the timer. */ - if(len) { + if (len) { if (!nowayout) { size_t i; @@ -188,13 +192,13 @@ static ssize_t softdog_write(struct file *file, const char __user *data, size_t return len; } -static int softdog_ioctl(struct inode *inode, struct file *file, - unsigned int cmd, unsigned long arg) +static long softdog_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) { void __user *argp = (void __user *)arg; int __user *p = argp; int new_margin; - static struct watchdog_info ident = { + static const struct watchdog_info ident = { .options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE, @@ -202,26 +206,25 @@ static int softdog_ioctl(struct inode *inode, struct file *file, .identity = "Software Watchdog", }; switch (cmd) { - default: - return -ENOTTY; - case WDIOC_GETSUPPORT: - return copy_to_user(argp, &ident, - sizeof(ident)) ? -EFAULT : 0; - case WDIOC_GETSTATUS: - case WDIOC_GETBOOTSTATUS: - return put_user(0, p); - case WDIOC_KEEPALIVE: - softdog_keepalive(); - return 0; - case WDIOC_SETTIMEOUT: - if (get_user(new_margin, p)) - return -EFAULT; - if (softdog_set_heartbeat(new_margin)) - return -EINVAL; - softdog_keepalive(); - /* Fall */ - case WDIOC_GETTIMEOUT: - return put_user(soft_margin, p); + default: + return -ENOTTY; + case WDIOC_GETSUPPORT: + return copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0; + case WDIOC_GETSTATUS: + case WDIOC_GETBOOTSTATUS: + return put_user(0, p); + case WDIOC_KEEPALIVE: + softdog_keepalive(); + return 0; + case WDIOC_SETTIMEOUT: + if (get_user(new_margin, p)) + return -EFAULT; + if (softdog_set_heartbeat(new_margin)) + return -EINVAL; + softdog_keepalive(); + /* Fall */ + case WDIOC_GETTIMEOUT: + return put_user(soft_margin, p); } } @@ -232,10 +235,9 @@ static int softdog_ioctl(struct inode *inode, struct file *file, static int softdog_notify_sys(struct notifier_block *this, unsigned long code, void *unused) { - if(code==SYS_DOWN || code==SYS_HALT) { + if (code == SYS_DOWN || code == SYS_HALT) /* Turn the WDT off */ softdog_stop(); - } return NOTIFY_DONE; } @@ -247,7 +249,7 @@ static const struct file_operations softdog_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .write = softdog_write, - .ioctl = softdog_ioctl, + .unlocked_ioctl = softdog_ioctl, .open = softdog_open, .release = softdog_release, }; @@ -268,24 +270,27 @@ static int __init watchdog_init(void) { int ret; - /* Check that the soft_margin value is within it's range ; if not reset to the default */ + /* Check that the soft_margin value is within it's range; + if not reset to the default */ if (softdog_set_heartbeat(soft_margin)) { softdog_set_heartbeat(TIMER_MARGIN); - printk(KERN_INFO PFX "soft_margin value must be 0<soft_margin<65536, using %d\n", + printk(KERN_INFO PFX + "soft_margin must be 0 < soft_margin < 65536, using %d\n", TIMER_MARGIN); } ret = register_reboot_notifier(&softdog_notifier); if (ret) { - printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - ret); + printk(KERN_ERR PFX + "cannot register reboot notifier (err=%d)\n", ret); return ret; } ret = misc_register(&softdog_miscdev); if (ret) { - printk (KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n", - WATCHDOG_MINOR, ret); + printk(KERN_ERR PFX + "cannot register miscdev on minor=%d (err=%d)\n", + WATCHDOG_MINOR, ret); unregister_reboot_notifier(&softdog_notifier); return ret; } |