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[WATCHDOG] mv64x60_wdt: Add a module parameter to change nowayout setting 

Also, use the WATCHDOG_NOWAYOUT macro, rather than #ifdefs,
and use __module_get to prevent module unloading if WATCHDOG_NOWAYOUT
is set.

Signed-off-by: Dale Farnsworth <dale@farnsworth.org>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Dale Farnsworth 2007-07-24 11:17:23 -07:00 committed by Wim Van Sebroeck
parent 85d57238d2
commit d37a5c3ddf
1 changed files with 9 additions and 3 deletions
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12
drivers/char/watchdog/mv64x60_wdt.c
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@ -45,6 +45,10 @@ static void __iomem *mv64x60_wdt_regs;
static int mv64x60_wdt_timeout; static int mv64x60_wdt_timeout;
static unsigned int bus_clk; static unsigned int bus_clk;
static int nowayout = WATCHDOG_NOWAYOUT;
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
static void mv64x60_wdt_reg_write(u32 val) static void mv64x60_wdt_reg_write(u32 val)
{ {
/* Allow write only to CTL1 / CTL2 fields, retaining values in /* Allow write only to CTL1 / CTL2 fields, retaining values in
@ -100,6 +104,9 @@ static int mv64x60_wdt_open(struct inode *inode, struct file *file)
if (test_and_set_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags)) if (test_and_set_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags))
return -EBUSY; return -EBUSY;
if (nowayout)
__module_get(THIS_MODULE);
mv64x60_wdt_service(); mv64x60_wdt_service();
mv64x60_wdt_handler_enable(); mv64x60_wdt_handler_enable();
@ -110,9 +117,8 @@ static int mv64x60_wdt_release(struct inode *inode, struct file *file)
{ {
mv64x60_wdt_service(); mv64x60_wdt_service();
#if !defined(CONFIG_WATCHDOG_NOWAYOUT) if (!nowayout)
mv64x60_wdt_handler_disable(); mv64x60_wdt_handler_disable();
#endif
clear_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags); clear_bit(MV64x60_WDOG_FLAG_OPENED, &wdt_flags);