Commit 4a418baf authored by Dave Jones's avatar Dave Jones

[PATCH] watchdog nowayout for machzwd

Originally from Matt Domsch.
Adds a nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
From 2.4
parent 5de9c24a
......@@ -24,6 +24,8 @@
* a system RESET and it starts wd#2 that unconditionaly will RESET
* the system when the counter reaches zero.
*
* 14-Dec-2001 Matt Domsch <Matt_Domsch@dell.com>
* Added nowayout module option to override CONFIG_WATCHDOG_NOWAYOUT
*/
#include <linux/config.h>
......@@ -103,6 +105,15 @@ MODULE_LICENSE("GPL");
MODULE_PARM(action, "i");
MODULE_PARM_DESC(action, "after watchdog resets, generate: 0 = RESET(*) 1 = SMI 2 = NMI 3 = SCI");
#ifdef CONFIG_WATCHDOG_NOWAYOUT
static int nowayout = 1;
#else
static int nowayout = 0;
#endif
MODULE_PARM(nowayout,"i");
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=CONFIG_WATCHDOG_NOWAYOUT)");
#define PFX "machzwd"
static struct watchdog_info zf_info = {
......@@ -307,7 +318,7 @@ static ssize_t zf_write(struct file *file, const char *buf, size_t count,
* no need to check for close confirmation
* no way to disable watchdog ;)
*/
#ifndef CONFIG_WATCHDOG_NOWAYOUT
if (!nowayout) {
size_t ofs;
/*
......@@ -323,7 +334,7 @@ static ssize_t zf_write(struct file *file, const char *buf, size_t count,
dprintk("zf_expect_close 1\n");
}
}
#endif
}
/*
* Well, anyhow someone wrote to us,
* we should return that favour
......@@ -386,9 +397,9 @@ static int zf_open(struct inode *inode, struct file *file)
return -EBUSY;
}
#ifdef CONFIG_WATCHDOG_NOWAYOUT
if (nowayout) {
MOD_INC_USE_COUNT;
#endif
}
zf_is_open = 1;
spin_unlock(&zf_lock);
......
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