diff options
Diffstat (limited to 'drivers/watchdog/wafer5823wdt.c')
-rw-r--r-- | drivers/watchdog/wafer5823wdt.c | 80 |
1 files changed, 46 insertions, 34 deletions
diff --git a/drivers/watchdog/wafer5823wdt.c b/drivers/watchdog/wafer5823wdt.c index 9e368091f79..886cbbcf3ee 100644 --- a/drivers/watchdog/wafer5823wdt.c +++ b/drivers/watchdog/wafer5823wdt.c @@ -36,8 +36,8 @@ #include <linux/reboot.h> #include <linux/init.h> #include <linux/spinlock.h> -#include <asm/io.h> -#include <asm/uaccess.h> +#include <linux/io.h> +#include <linux/uaccess.h> #define WATCHDOG_NAME "Wafer 5823 WDT" #define PFX WATCHDOG_NAME ": " @@ -61,11 +61,15 @@ static int wdt_start = 0x443; static int timeout = WD_TIMO; /* in seconds */ module_param(timeout, int, 0); -MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. 1<= timeout <=255, default=" __MODULE_STRING(WD_TIMO) "."); +MODULE_PARM_DESC(timeout, + "Watchdog timeout in seconds. 1 <= timeout <= 255, default=" + __MODULE_STRING(WD_TIMO) "."); 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) ")"); static void wafwdt_ping(void) { @@ -90,7 +94,8 @@ wafwdt_stop(void) inb_p(wdt_stop); } -static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t count, loff_t * ppos) +static ssize_t wafwdt_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) { /* See if we got the magic character 'V' and reload the timer */ if (count) { @@ -100,7 +105,8 @@ static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t co /* In case it was set long ago */ expect_close = 0; - /* scan to see whether or not we got the magic character */ + /* scan to see whether or not we got the magic + character */ for (i = 0; i != count; i++) { char c; if (get_user(c, buf + i)) @@ -109,27 +115,29 @@ static ssize_t wafwdt_write(struct file *file, const char __user *buf, size_t co expect_close = 42; } } - /* Well, anyhow someone wrote to us, we should return that favour */ + /* Well, anyhow someone wrote to us, we should + return that favour */ wafwdt_ping(); } return count; } -static int wafwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd, - unsigned long arg) +static long wafwdt_ioctl(struct file *file, unsigned int cmd, + unsigned long arg) { int new_timeout; void __user *argp = (void __user *)arg; int __user *p = argp; - static struct watchdog_info ident = { - .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE, + static const struct watchdog_info ident = { + .options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | + WDIOF_MAGICCLOSE, .firmware_version = 1, .identity = "Wafer 5823 WDT", }; switch (cmd) { case WDIOC_GETSUPPORT: - if (copy_to_user(argp, &ident, sizeof (ident))) + if (copy_to_user(argp, &ident, sizeof(ident))) return -EFAULT; break; @@ -194,10 +202,11 @@ static int wafwdt_open(struct inode *inode, struct file *file) static int wafwdt_close(struct inode *inode, struct file *file) { - if (expect_close == 42) { + if (expect_close == 42) wafwdt_stop(); - } else { - printk(KERN_CRIT PFX "WDT device closed unexpectedly. WDT will not stop!\n"); + else { + printk(KERN_CRIT PFX + "WDT device closed unexpectedly. WDT will not stop!\n"); wafwdt_ping(); } clear_bit(0, &wafwdt_is_open); @@ -209,12 +218,11 @@ wafwdt_close(struct inode *inode, struct file *file) * Notifier for system down */ -static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code, void *unused) +static int wafwdt_notify_sys(struct notifier_block *this, unsigned long code, + void *unused) { - if (code == SYS_DOWN || code == SYS_HALT) { - /* Turn the WDT off */ + if (code == SYS_DOWN || code == SYS_HALT) wafwdt_stop(); - } return NOTIFY_DONE; } @@ -226,7 +234,7 @@ static const struct file_operations wafwdt_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .write = wafwdt_write, - .ioctl = wafwdt_ioctl, + .unlocked_ioctl = wafwdt_ioctl, .open = wafwdt_open, .release = wafwdt_close, }; @@ -250,25 +258,28 @@ static int __init wafwdt_init(void) { int ret; - printk(KERN_INFO "WDT driver for Wafer 5823 single board computer initialising.\n"); + printk(KERN_INFO + "WDT driver for Wafer 5823 single board computer initialising.\n"); if (timeout < 1 || timeout > 255) { timeout = WD_TIMO; - printk (KERN_INFO PFX "timeout value must be 1<=x<=255, using %d\n", - timeout); + printk(KERN_INFO PFX + "timeout value must be 1 <= x <= 255, using %d\n", + timeout); } if (wdt_stop != wdt_start) { - if(!request_region(wdt_stop, 1, "Wafer 5823 WDT")) { - printk (KERN_ERR PFX "I/O address 0x%04x already in use\n", - wdt_stop); + if (!request_region(wdt_stop, 1, "Wafer 5823 WDT")) { + printk(KERN_ERR PFX + "I/O address 0x%04x already in use\n", + wdt_stop); ret = -EIO; goto error; } } - if(!request_region(wdt_start, 1, "Wafer 5823 WDT")) { - printk (KERN_ERR PFX "I/O address 0x%04x already in use\n", + if (!request_region(wdt_start, 1, "Wafer 5823 WDT")) { + printk(KERN_ERR PFX "I/O address 0x%04x already in use\n", wdt_start); ret = -EIO; goto error2; @@ -276,19 +287,20 @@ static int __init wafwdt_init(void) ret = register_reboot_notifier(&wafwdt_notifier); if (ret != 0) { - printk (KERN_ERR PFX "cannot register reboot notifier (err=%d)\n", - ret); + printk(KERN_ERR PFX + "cannot register reboot notifier (err=%d)\n", ret); goto error3; } ret = misc_register(&wafwdt_miscdev); if (ret != 0) { - 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); goto error4; } - printk (KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n", + printk(KERN_INFO PFX "initialized. timeout=%d sec (nowayout=%d)\n", timeout, nowayout); return ret; @@ -307,7 +319,7 @@ static void __exit wafwdt_exit(void) { misc_deregister(&wafwdt_miscdev); unregister_reboot_notifier(&wafwdt_notifier); - if(wdt_stop != wdt_start) + if (wdt_stop != wdt_start) release_region(wdt_stop, 1); release_region(wdt_start, 1); } |