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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2008-08-08 17:33:47 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2008-08-08 19:18:18 +0100
commit097d9eb537ff4d88b74c3fe67392e27c478ca3c5 (patch)
tree9034d676d9096857a380aab9d99e3e88fccb6bfe /drivers/watchdog/sbc8360.c
parentc41107c2d4fd31924533f4dbc4c3428acc2b5894 (diff)
parentaeee90dfa01844168cd7f8051d0a0f969c573067 (diff)
Merge Linus' latest into master
Conflicts: drivers/watchdog/at91rm9200_wdt.c drivers/watchdog/davinci_wdt.c drivers/watchdog/ep93xx_wdt.c drivers/watchdog/ixp2000_wdt.c drivers/watchdog/ixp4xx_wdt.c drivers/watchdog/ks8695_wdt.c drivers/watchdog/omap_wdt.c drivers/watchdog/pnx4008_wdt.c drivers/watchdog/sa1100_wdt.c drivers/watchdog/wdt285.c
Diffstat (limited to 'drivers/watchdog/sbc8360.c')
-rw-r--r--drivers/watchdog/sbc8360.c46
1 files changed, 23 insertions, 23 deletions
diff --git a/drivers/watchdog/sbc8360.c b/drivers/watchdog/sbc8360.c
index 2ee2677f3648..fd83dd052d8c 100644
--- a/drivers/watchdog/sbc8360.c
+++ b/drivers/watchdog/sbc8360.c
@@ -48,13 +48,12 @@
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/moduleparam.h>
+#include <linux/io.h>
+#include <linux/uaccess.h>
-#include <asm/io.h>
-#include <asm/uaccess.h>
#include <asm/system.h>
static unsigned long sbc8360_is_open;
-static DEFINE_SPINLOCK(sbc8360_lock);
static char expect_close;
#define PFX "sbc8360: "
@@ -204,7 +203,8 @@ module_param(timeout, int, 0);
MODULE_PARM_DESC(timeout, "Index into timeout table (0-63) (default=27 (60s))");
module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout,
- "Watchdog cannot be stopped once started (default=" __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
+ "Watchdog cannot be stopped once started (default="
+ __MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* Kernel methods.
@@ -231,9 +231,16 @@ static void sbc8360_ping(void)
outb(wd_margin, SBC8360_BASETIME);
}
+/* stop watchdog */
+static void sbc8360_stop(void)
+{
+ /* De-activate the watchdog */
+ outb(0, SBC8360_ENABLE);
+}
+
/* Userspace pings kernel driver, or requests clean close */
-static ssize_t sbc8360_write(struct file *file, const char __user * buf,
- size_t count, loff_t * ppos)
+static ssize_t sbc8360_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
if (count) {
if (!nowayout) {
@@ -257,16 +264,12 @@ static ssize_t sbc8360_write(struct file *file, const char __user * buf,
static int sbc8360_open(struct inode *inode, struct file *file)
{
- spin_lock(&sbc8360_lock);
- if (test_and_set_bit(0, &sbc8360_is_open)) {
- spin_unlock(&sbc8360_lock);
+ if (test_and_set_bit(0, &sbc8360_is_open))
return -EBUSY;
- }
if (nowayout)
__module_get(THIS_MODULE);
/* Activate and ping once to start the countdown */
- spin_unlock(&sbc8360_lock);
sbc8360_activate();
sbc8360_ping();
return nonseekable_open(inode, file);
@@ -274,16 +277,14 @@ static int sbc8360_open(struct inode *inode, struct file *file)
static int sbc8360_close(struct inode *inode, struct file *file)
{
- spin_lock(&sbc8360_lock);
if (expect_close == 42)
- outb(0, SBC8360_ENABLE);
+ sbc8360_stop();
else
printk(KERN_CRIT PFX
- "SBC8360 device closed unexpectedly. SBC8360 will not stop!\n");
+ "SBC8360 device closed unexpectedly. SBC8360 will not stop!\n");
clear_bit(0, &sbc8360_is_open);
expect_close = 0;
- spin_unlock(&sbc8360_lock);
return 0;
}
@@ -294,10 +295,9 @@ static int sbc8360_close(struct inode *inode, struct file *file)
static int sbc8360_notify_sys(struct notifier_block *this, unsigned long code,
void *unused)
{
- if (code == SYS_DOWN || code == SYS_HALT) {
- /* Disable the SBC8360 Watchdog */
- outb(0, SBC8360_ENABLE);
- }
+ if (code == SYS_DOWN || code == SYS_HALT)
+ sbc8360_stop(); /* Disable the SBC8360 Watchdog */
+
return NOTIFY_DONE;
}
@@ -382,13 +382,13 @@ static int __init sbc8360_init(void)
return 0;
- out_nomisc:
+out_nomisc:
unregister_reboot_notifier(&sbc8360_notifier);
- out_noreboot:
+out_noreboot:
release_region(SBC8360_BASETIME, 1);
- out_nobasetimereg:
+out_nobasetimereg:
release_region(SBC8360_ENABLE, 1);
- out:
+out:
return res;
}