diff options
| -rw-r--r-- | drivers/char/watchdog/rm9k_wdt.c | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/drivers/char/watchdog/rm9k_wdt.c b/drivers/char/watchdog/rm9k_wdt.c index 22aab8703ed..ec3909371c2 100644 --- a/drivers/char/watchdog/rm9k_wdt.c +++ b/drivers/char/watchdog/rm9k_wdt.c @@ -26,6 +26,7 @@ #include <linux/interrupt.h> #include <linux/fs.h> #include <linux/reboot.h> +#include <linux/notifier.h> #include <linux/miscdevice.h> #include <linux/watchdog.h> #include <asm/io.h> @@ -47,13 +48,15 @@ /* Function prototypes */ static irqreturn_t wdt_gpi_irqhdl(int, void *, struct pt_regs *); +static void wdt_gpi_start(void); +static void wdt_gpi_stop(void); static void wdt_gpi_set_timeout(unsigned int); static int wdt_gpi_open(struct inode *, struct file *); static int wdt_gpi_release(struct inode *, struct file *); static ssize_t wdt_gpi_write(struct file *, const char __user *, size_t, loff_t *); static long wdt_gpi_ioctl(struct file *, unsigned int, unsigned long); -static const struct resource *wdt_gpi_get_resource(struct platform_device *, const char *, unsigned int); static int wdt_gpi_notify(struct notifier_block *, unsigned long, void *); +static const struct resource *wdt_gpi_get_resource(struct platform_device *, const char *, unsigned int); static int __init wdt_gpi_probe(struct device *); static int __exit wdt_gpi_remove(struct device *); @@ -61,7 +64,7 @@ static int __exit wdt_gpi_remove(struct device *); static const char wdt_gpi_name[] = "wdt_gpi"; static atomic_t opencnt; static int expect_close; -static int locked = 0; +static int locked; /* These are set from device resources */ @@ -82,7 +85,7 @@ static unsigned long flagaddr = 0xbffdc104; module_param(flagaddr, ulong, 0444); MODULE_PARM_DESC(flagaddr, "Address to write to boot flags to"); -static int powercycle = 0; +static int powercycle; module_param(powercycle, bool, 0444); MODULE_PARM_DESC(powercycle, "Cycle power if watchdog expires"); @@ -99,7 +102,7 @@ static irqreturn_t wdt_gpi_irqhdl(int irq, void *ctxt, struct pt_regs *regs) __raw_writel(0x1, wd_regs + 0x0008); - printk(KERN_WARNING "%s: watchdog expired - resetting system\n", + printk(KERN_CRIT "%s: watchdog expired - resetting system\n", wdt_gpi_name); *(volatile char *) flagaddr |= 0x01; @@ -155,11 +158,11 @@ static void wdt_gpi_set_timeout(unsigned int to) /* /dev/watchdog operations */ -static int wdt_gpi_open(struct inode *i, struct file *f) +static int wdt_gpi_open(struct inode *inode, struct file *file) { int res; - if (unlikely(0 > atomic_dec_if_positive(&opencnt))) + if (unlikely(atomic_dec_if_positive(&opencnt) < 0)) return -EBUSY; expect_close = 0; @@ -179,13 +182,13 @@ static int wdt_gpi_open(struct inode *i, struct file *f) printk(KERN_INFO "%s: watchdog started, timeout = %u seconds\n", wdt_gpi_name, timeout); - return 0; + return nonseekable_open(inode, file); } -static int wdt_gpi_release(struct inode *i, struct file *f) +static int wdt_gpi_release(struct inode *inode, struct file *file) { if (nowayout) { - printk(KERN_NOTICE "%s: no way out - watchdog left running\n", + printk(KERN_INFO "%s: no way out - watchdog left running\n", wdt_gpi_name); __module_get(THIS_MODULE); locked = 1; @@ -195,7 +198,7 @@ static int wdt_gpi_release(struct inode *i, struct file *f) free_irq(wd_irq, &miscdev); printk(KERN_INFO "%s: watchdog stopped\n", wdt_gpi_name); } else { - printk(KERN_NOTICE "%s: unexpected close() -" + printk(KERN_CRIT "%s: unexpected close() -" " watchdog left running\n", wdt_gpi_name); wdt_gpi_set_timeout(timeout); @@ -224,6 +227,7 @@ wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg) long res = -ENOTTY; const long size = _IOC_SIZE(cmd); int stat; + void __user *argp = (void __user *)arg; static struct watchdog_info wdinfo = { .identity = "RM9xxx/GPI watchdog", .firmware_version = 0, @@ -248,8 +252,7 @@ wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg) wdinfo.options = nowayout ? WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING : WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING | WDIOF_MAGICCLOSE; - res = __copy_to_user((void __user *)arg, &wdinfo, size) ? - -EFAULT : size; + res = __copy_to_user(argp, &wdinfo, size) ? -EFAULT : size; break; case WDIOC_GETSTATUS: @@ -258,7 +261,7 @@ wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg) case WDIOC_GETBOOTSTATUS: stat = (*(volatile char *) flagaddr & 0x01) ? WDIOF_CARDRESET : 0; - res = __copy_to_user((void __user *)arg, &stat, size) ? + res = __copy_to_user(argp, &stat, size) ? -EFAULT : size; break; @@ -273,24 +276,23 @@ wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg) case WDIOC_SETTIMEOUT: { int val; - if (unlikely(__copy_from_user(&val, (const void __user *) arg, - size))) { + if (unlikely(__copy_from_user(&val, argp, size))) { res = -EFAULT; break; } - if (val > 32) - val = 32; + if (val > MAX_TIMEOUT_SECONDS) + val = MAX_TIMEOUT_SECONDS; timeout = val; wdt_gpi_set_timeout(val); res = size; - printk("%s: timeout set to %u seconds\n", + printk(KERN_INFO "%s: timeout set to %u seconds\n", wdt_gpi_name, timeout); } break; case WDIOC_GETTIMEOUT: - res = __copy_to_user((void __user *) arg, &timeout, size) ? + res = __copy_to_user(argp, &timeout, size) ? -EFAULT : size; break; } @@ -299,7 +301,7 @@ wdt_gpi_ioctl(struct file *f, unsigned int cmd, unsigned long arg) } -/* Shutdown notifier*/ +/* Shutdown notifier */ static int wdt_gpi_notify(struct notifier_block *this, unsigned long code, void *unused) { |