forked from luck/tmp_suning_uos_patched
[WATCHDOG] ib700wdt.c spinlock/WDIOC_SETOPTIONS changes
Add the WDIOC_SETOPTIONS ioctl call. Because of this we move the spinlocking to the different watchdog operations. Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
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c9d7710ea2
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@ -128,14 +128,20 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" _
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static void
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ibwdt_ping(void)
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{
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spin_lock(&ibwdt_lock);
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/* Write a watchdog value */
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outb_p(wd_margin, WDT_START);
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spin_unlock(&ibwdt_lock);
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}
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static void
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ibwdt_disable(void)
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{
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spin_lock(&ibwdt_lock);
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outb_p(0, WDT_STOP);
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spin_unlock(&ibwdt_lock);
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}
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static int
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@ -218,7 +224,26 @@ ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
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case WDIOC_GETTIMEOUT:
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return put_user(wd_times[wd_margin], p);
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break;
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case WDIOC_SETOPTIONS:
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{
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int options, retval = -EINVAL;
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if (get_user(options, p))
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return -EFAULT;
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if (options & WDIOS_DISABLECARD) {
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ibwdt_disable();
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retval = 0;
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}
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if (options & WDIOS_ENABLECARD) {
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ibwdt_ping();
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retval = 0;
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}
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return retval;
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}
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default:
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return -ENOTTY;
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@ -229,9 +254,7 @@ ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
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static int
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ibwdt_open(struct inode *inode, struct file *file)
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{
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spin_lock(&ibwdt_lock);
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if (test_and_set_bit(0, &ibwdt_is_open)) {
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spin_unlock(&ibwdt_lock);
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return -EBUSY;
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}
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if (nowayout)
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@ -239,14 +262,12 @@ ibwdt_open(struct inode *inode, struct file *file)
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/* Activate */
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ibwdt_ping();
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spin_unlock(&ibwdt_lock);
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return nonseekable_open(inode, file);
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}
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static int
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ibwdt_close(struct inode *inode, struct file *file)
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{
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spin_lock(&ibwdt_lock);
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if (expect_close == 42) {
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ibwdt_disable();
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} else {
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@ -255,7 +276,6 @@ ibwdt_close(struct inode *inode, struct file *file)
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}
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clear_bit(0, &ibwdt_is_open);
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expect_close = 0;
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spin_unlock(&ibwdt_lock);
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return 0;
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}
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