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[WATCHDOG 41/57] sb_wdog: Clean up and switch to unlocked_ioctl
Review and switch to unlocked_ioctl Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Alan Cox
Wim Van Sebroeck
parent
f4f6f65a55
commit
df3c9de3de
@ -57,6 +57,7 @@
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#include <asm/sibyte/sb1250_int.h>
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#include <asm/sibyte/sb1250_scd.h>
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static DEFINE_SPINLOCK(sbwd_lock);
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/*
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* set the initial count value of a timer
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@ -65,8 +66,10 @@
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*/
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void sbwdog_set(char __iomem *wdog, unsigned long t)
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{
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spin_lock(&sbwd_lock);
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__raw_writeb(0, wdog - 0x10);
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__raw_writeq(t & 0x7fffffUL, wdog);
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spin_unlock(&sbwd_lock);
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}
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/*
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@ -77,7 +80,9 @@ void sbwdog_set(char __iomem *wdog, unsigned long t)
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*/
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void sbwdog_pet(char __iomem *wdog)
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{
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spin_lock(&sbwd_lock);
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__raw_writeb(__raw_readb(wdog) | 1, wdog);
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spin_unlock(&sbwd_lock);
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}
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static unsigned long sbwdog_gate; /* keeps it to one thread only */
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@ -86,8 +91,9 @@ static char __iomem *user_dog = (char __iomem *)(IO_BASE + (A_SCD_WDOG_CFG_1));
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static unsigned long timeout = 0x7fffffUL; /* useconds: 8.3ish secs. */
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static int expect_close;
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static struct watchdog_info ident = {
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.options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
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static const struct watchdog_info ident = {
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.options = WDIOF_CARDRESET | WDIOF_SETTIMEOUT |
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WDIOF_KEEPALIVEPING,
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.identity = "SiByte Watchdog",
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};
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@ -97,9 +103,8 @@ static struct watchdog_info ident = {
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static int sbwdog_open(struct inode *inode, struct file *file)
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{
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nonseekable_open(inode, file);
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if (test_and_set_bit(0, &sbwdog_gate)) {
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if (test_and_set_bit(0, &sbwdog_gate))
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return -EBUSY;
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}
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__module_get(THIS_MODULE);
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/*
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@ -120,8 +125,9 @@ static int sbwdog_release(struct inode *inode, struct file *file)
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__raw_writeb(0, user_dog);
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module_put(THIS_MODULE);
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} else {
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printk(KERN_CRIT "%s: Unexpected close, not stopping watchdog!\n",
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ident.identity);
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printk(KERN_CRIT
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"%s: Unexpected close, not stopping watchdog!\n",
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ident.identity);
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sbwdog_pet(user_dog);
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}
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clear_bit(0, &sbwdog_gate);
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@ -147,12 +153,10 @@ static ssize_t sbwdog_write(struct file *file, const char __user *data,
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for (i = 0; i != len; i++) {
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char c;
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if (get_user(c, data + i)) {
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if (get_user(c, data + i))
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return -EFAULT;
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}
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if (c == 'V') {
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if (c == 'V')
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expect_close = 42;
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}
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}
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sbwdog_pet(user_dog);
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}
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@ -160,8 +164,8 @@ static ssize_t sbwdog_write(struct file *file, const char __user *data,
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return len;
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}
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static int sbwdog_ioctl(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg)
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static long sbwdog_ioctl(struct file *file, unsigned int cmd,
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unsigned long arg)
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{
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int ret = -ENOTTY;
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unsigned long time;
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@ -180,9 +184,8 @@ static int sbwdog_ioctl(struct inode *inode, struct file *file,
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case WDIOC_SETTIMEOUT:
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ret = get_user(time, p);
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if (ret) {
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if (ret)
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break;
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}
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time *= 1000000;
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if (time > 0x7fffffUL) {
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@ -226,18 +229,16 @@ sbwdog_notify_sys(struct notifier_block *this, unsigned long code, void *erf)
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return NOTIFY_DONE;
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}
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static const struct file_operations sbwdog_fops =
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{
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static const struct file_operations sbwdog_fops = {
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.owner = THIS_MODULE,
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.llseek = no_llseek,
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.write = sbwdog_write,
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.ioctl = sbwdog_ioctl,
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.unlocked_ioctl = sbwdog_ioctl,
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.open = sbwdog_open,
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.release = sbwdog_release,
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};
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static struct miscdevice sbwdog_miscdev =
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{
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static struct miscdevice sbwdog_miscdev = {
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.minor = WATCHDOG_MINOR,
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.name = "watchdog",
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.fops = &sbwdog_fops,
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@ -267,13 +268,12 @@ irqreturn_t sbwdog_interrupt(int irq, void *addr)
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/*
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* if it's the second watchdog timer, it's for those users
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*/
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if (wd_cfg_reg == user_dog) {
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if (wd_cfg_reg == user_dog)
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printk(KERN_CRIT
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"%s in danger of initiating system reset in %ld.%01ld seconds\n",
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ident.identity, wd_init / 1000000, (wd_init / 100000) % 10);
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} else {
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else
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cfg |= 1;
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}
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__raw_writeb(cfg, wd_cfg_reg);
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@ -289,28 +289,31 @@ static int __init sbwdog_init(void)
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*/
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ret = register_reboot_notifier(&sbwdog_notifier);
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if (ret) {
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printk (KERN_ERR "%s: cannot register reboot notifier (err=%d)\n",
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ident.identity, ret);
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printk(KERN_ERR
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"%s: cannot register reboot notifier (err=%d)\n",
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ident.identity, ret);
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return ret;
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}
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/*
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* get the resources
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*/
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ret = misc_register(&sbwdog_miscdev);
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if (ret == 0) {
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printk(KERN_INFO "%s: timeout is %ld.%ld secs\n", ident.identity,
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timeout / 1000000, (timeout / 100000) % 10);
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}
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ret = request_irq(1, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
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ident.identity, (void *)user_dog);
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if (ret) {
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printk(KERN_ERR "%s: failed to request irq 1 - %d\n", ident.identity,
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ret);
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misc_deregister(&sbwdog_miscdev);
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printk(KERN_ERR "%s: failed to request irq 1 - %d\n",
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ident.identity, ret);
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return ret;
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}
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ret = misc_register(&sbwdog_miscdev);
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if (ret == 0) {
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printk(KERN_INFO "%s: timeout is %ld.%ld secs\n",
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ident.identity,
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timeout / 1000000, (timeout / 100000) % 10);
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} else
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free_irq(1, (void *)user_dog);
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return ret;
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}
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@ -327,7 +330,7 @@ MODULE_DESCRIPTION("SiByte Watchdog");
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module_param(timeout, ulong, 0);
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MODULE_PARM_DESC(timeout,
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"Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs)");
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"Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs)");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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@ -336,16 +339,15 @@ MODULE_ALIAS_MISCDEV(WATCHDOG_MINOR);
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* example code that can be put in a platform code area to utilize the
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* first watchdog timer for the kernels own purpose.
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void
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platform_wd_setup(void)
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void platform_wd_setup(void)
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{
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int ret;
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ret = request_irq(0, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
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ret = request_irq(1, sbwdog_interrupt, IRQF_DISABLED | IRQF_SHARED,
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"Kernel Watchdog", IOADDR(A_SCD_WDOG_CFG_0));
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if (ret) {
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printk(KERN_CRIT "Watchdog IRQ zero(0) failed to be requested - %d\n",
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ret);
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printk(KERN_CRIT
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"Watchdog IRQ zero(0) failed to be requested - %d\n", ret);
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}
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}
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