leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

[WATCHDOG 43/57] sc520_wdt: Clean up and switch to unlocked_ioctl

Browse Source 
Review and switch to unlocked_ioctl

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
This commit is contained in:
Alan Cox 2008-05-19 14:08:44 +01:00 committed by Wim Van Sebroeck
parent d14bccaada
commit ff94806057
1 changed files with 87 additions and 76 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
drivers/watchdog/sc520_wdt.c
View File

@ -64,9 +64,9 @@
#include <linux/reboot.h>
#include <linux/init.h>
#include <linux/jiffies.h>
#include <linux/io.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/system.h>
#define OUR_NAME "sc520_wdt"
@ -91,13 +91,18 @@
*/
#define WATCHDOG_TIMEOUT 30 /* 30 sec default timeout */
static int timeout = WATCHDOG_TIMEOUT; /* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
/* in seconds, will be multiplied by HZ to get seconds to wait for a ping */
static int timeout = WATCHDOG_TIMEOUT;
module_param(timeout, int, 0);
MODULE_PARM_DESC(timeout, "Watchdog timeout in seconds. (1<=timeout<=3600, default=" __MODULE_STRING(WATCHDOG_TIMEOUT) ")");
MODULE_PARM_DESC(timeout,
"Watchdog timeout in seconds. (1 <= timeout <= 3600, default="
__MODULE_STRING(WATCHDOG_TIMEOUT) ")");
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) ")");
MODULE_PARM_DESC(nowayout,
"Watchdog cannot be stopped once started (default="
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
* AMD Elan SC520 - Watchdog Timer Registers
@ -136,8 +141,7 @@ static void wdt_timer_ping(unsigned long data)
/* If we got a heartbeat pulse within the WDT_US_INTERVAL
* we agree to ping the WDT
*/
if(time_before(jiffies, next_heartbeat))
{
if (time_before(jiffies, next_heartbeat)) {
/* Ping the WDT */
spin_lock(&wdt_spinlock);
writew(0xAAAA, wdtmrctl);
@ -146,9 +150,9 @@ static void wdt_timer_ping(unsigned long data)
/* Re-set the timer interval */
mod_timer(&timer, jiffies + WDT_INTERVAL);
} else {
printk(KERN_WARNING PFX "Heartbeat lost! Will not ping the watchdog\n");
}
} else
printk(KERN_WARNING PFX
"Heartbeat lost! Will not ping the watchdog\n");
}
/*
@ -219,7 +223,8 @@ static int wdt_set_heartbeat(int t)
* /dev/watchdog handling
*/
static ssize_t fop_write(struct file * file, const char __user * buf, size_t count, loff_t * ppos)
static ssize_t fop_write(struct file *file, const char __user *buf,
size_t count, loff_t *ppos)
{
/* See if we got the magic character 'V' and reload the timer */
if (count) {
@ -240,7 +245,8 @@ static ssize_t fop_write(struct file * file, const char __user * buf, size_t cou
}
}
/* Well, anyhow someone wrote to us, we should return that favour */
/* Well, anyhow someone wrote to us, we should
return that favour */
wdt_keepalive();
}
return count;
@ -261,10 +267,11 @@ static int fop_open(struct inode * inode, struct file * file)
static int fop_close(struct inode *inode, struct file *file)
{
if(wdt_expect_close == 42) {
if (wdt_expect_close == 42)
wdt_turnoff();
} else {
printk(KERN_CRIT PFX "Unexpected close, not stopping watchdog!\n");
else {
printk(KERN_CRIT PFX
"Unexpected close, not stopping watchdog!\n");
wdt_keepalive();
}
clear_bit(0, &wdt_is_open);
@ -272,13 +279,13 @@ static int fop_close(struct inode * inode, struct file * file)
return 0;
}
static int fop_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
unsigned long arg)
static int fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
static struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT | WDIOF_MAGICCLOSE,
static const struct watchdog_info ident = {
.options = WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT
| WDIOF_MAGICCLOSE,
.firmware_version = 1,
.identity = "SC520",
};
@ -383,10 +390,12 @@ static int __init sc520_wdt_init(void)
{
int rc = -EBUSY;
/* Check that the timeout value is within it's range ; if not reset to the default */
/* Check that the timeout value is within it's range ;
if not reset to the default */
if (wdt_set_heartbeat(timeout)) {
wdt_set_heartbeat(WATCHDOG_TIMEOUT);
printk(KERN_INFO PFX "timeout value must be 1<=timeout<=3600, using %d\n",
printk(KERN_INFO PFX
"timeout value must be 1 <= timeout <= 3600, using %d\n",
WATCHDOG_TIMEOUT);
}
@ -399,19 +408,21 @@ static int __init sc520_wdt_init(void)
rc = register_reboot_notifier(&wdt_notifier);
if (rc) {
printk(KERN_ERR PFX "cannot register reboot notifier (err=%d)\n",
rc);
printk(KERN_ERR PFX
"cannot register reboot notifier (err=%d)\n", rc);
goto err_out_ioremap;
}
rc = misc_register(&wdt_miscdev);
if (rc) {
printk(KERN_ERR PFX "cannot register miscdev on minor=%d (err=%d)\n",
printk(KERN_ERR PFX
"cannot register miscdev on minor=%d (err=%d)\n",
WATCHDOG_MINOR, rc);
goto err_out_notifier;
}
printk(KERN_INFO PFX "WDT driver for SC520 initialised. timeout=%d sec (nowayout=%d)\n",
printk(KERN_INFO PFX
"WDT driver for SC520 initialised. timeout=%d sec (nowayout=%d)\n",
timeout, nowayout);
return 0;