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[WATCHDOG] ib700wdt.c spinlock/WDIOC_SETOPTIONS changes

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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>
This commit is contained in:
Wim Van Sebroeck 2007-01-27 22:12:54 +01:00
parent c9d7710ea2
commit e42162a46d
1 changed files with 26 additions and 6 deletions
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32
drivers/char/watchdog/ib700wdt.c
View file

@ -128,14 +128,20 @@ MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" _
static void
ibwdt_ping(void)
{
spin_lock(&ibwdt_lock);
/* Write a watchdog value */
outb_p(wd_margin, WDT_START);
spin_unlock(&ibwdt_lock);
}
static void
ibwdt_disable(void)
{
spin_lock(&ibwdt_lock);
outb_p(0, WDT_STOP);
spin_unlock(&ibwdt_lock);
}
static int
@ -218,7 +224,26 @@ ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
case WDIOC_GETTIMEOUT:
return put_user(wd_times[wd_margin], p);
break;
case WDIOC_SETOPTIONS:
{
int options, retval = -EINVAL;
if (get_user(options, p))
return -EFAULT;
if (options & WDIOS_DISABLECARD) {
ibwdt_disable();
retval = 0;
}
if (options & WDIOS_ENABLECARD) {
ibwdt_ping();
retval = 0;
}
return retval;
}
default:
return -ENOTTY;
@ -229,9 +254,7 @@ ibwdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
static int
ibwdt_open(struct inode *inode, struct file *file)
{
spin_lock(&ibwdt_lock);
if (test_and_set_bit(0, &ibwdt_is_open)) {
spin_unlock(&ibwdt_lock);
return -EBUSY;
}
if (nowayout)
@ -239,14 +262,12 @@ ibwdt_open(struct inode *inode, struct file *file)
/* Activate */
ibwdt_ping();
spin_unlock(&ibwdt_lock);
return nonseekable_open(inode, file);
}
static int
ibwdt_close(struct inode *inode, struct file *file)
{
spin_lock(&ibwdt_lock);
if (expect_close == 42) {
ibwdt_disable();
} else {
@ -255,7 +276,6 @@ ibwdt_close(struct inode *inode, struct file *file)
}
clear_bit(0, &ibwdt_is_open);
expect_close = 0;
spin_unlock(&ibwdt_lock);
return 0;
}