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[WATCHDOG] s3c24XX nowayout

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If the driver is not configured for `no way out`,
then the open method should not automatically allow
the setting of allow_close to CLOSE_STATE_ALLOW.

The setting of allow_close nullifies the use of
the magic close via the write path. It means that
in the default state, the watchdog will shut-down
even if the magic close has not been issued.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Ben Dooks 2006-09-06 12:24:35 +01:00 committed by Wim Van Sebroeck
parent 65a64ec3b4
commit 25ff3780d4
1 changed files with 5 additions and 5 deletions
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10
drivers/char/watchdog/s3c2410_wdt.c
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@ -62,7 +62,7 @@
#define CONFIG_S3C2410_WATCHDOG_ATBOOT (0) #define CONFIG_S3C2410_WATCHDOG_ATBOOT (0)
#define CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME (15) #define CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME (15)
static int nowayout = WATCHDOG_NOWAYOUT; static int nowayout = WATCHDOG_NOWAYOUT;
static int tmr_margin = CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME; static int tmr_margin = CONFIG_S3C2410_WATCHDOG_DEFAULT_TIME;
static int tmr_atboot = CONFIG_S3C2410_WATCHDOG_ATBOOT; static int tmr_atboot = CONFIG_S3C2410_WATCHDOG_ATBOOT;
static int soft_noboot = 0; static int soft_noboot = 0;
@ -213,11 +213,10 @@ static int s3c2410wdt_open(struct inode *inode, struct file *file)
if(down_trylock(&open_lock)) if(down_trylock(&open_lock))
return -EBUSY; return -EBUSY;
if (nowayout) { if (nowayout)
__module_get(THIS_MODULE); __module_get(THIS_MODULE);
} else {
allow_close = CLOSE_STATE_ALLOW; allow_close = CLOSE_STATE_NOT;
}
/* start the timer */ /* start the timer */
s3c2410wdt_start(); s3c2410wdt_start();
@ -230,6 +229,7 @@ static int s3c2410wdt_release(struct inode *inode, struct file *file)
* Shut off the timer. * Shut off the timer.
* Lock it in if it's a module and we set nowayout * Lock it in if it's a module and we set nowayout
*/ */
if (allow_close == CLOSE_STATE_ALLOW) { if (allow_close == CLOSE_STATE_ALLOW) {
s3c2410wdt_stop(); s3c2410wdt_stop();
} else { } else {