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[WATCHDOG 44/57] scx200_wdt: clean up and switch to unlocked_ioctl

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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 14:08:49 +01:00 committed by Wim Van Sebroeck
parent ff94806057
commit 9b748ed03c
2 changed files with 32 additions and 31 deletions
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4
drivers/watchdog/sc520_wdt.c
View File

@ -279,7 +279,7 @@ static int fop_close(struct inode *inode, struct file *file)
return 0;
}
static int fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
static long fop_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
void __user *argp = (void __user *)arg;
int __user *p = argp;
@ -345,7 +345,7 @@ static const struct file_operations wdt_fops = {
.write = fop_write,
.open = fop_open,
.release = fop_close,
.ioctl = fop_ioctl,
.unlocked_ioctl = fop_ioctl,
};
static struct miscdevice wdt_miscdev = {

59
drivers/watchdog/scx200_wdt.c
View File

@ -27,9 +27,8 @@
#include <linux/fs.h>
#include <linux/ioport.h>
#include <linux/scx200.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/uaccess.h>
#include <linux/io.h>
#define NAME "scx200_wdt"
@ -47,8 +46,9 @@ module_param(nowayout, int, 0);
MODULE_PARM_DESC(nowayout, "Disable watchdog shutdown on close");
static u16 wdto_restart;
static struct semaphore open_semaphore;
static char expect_close;
static unsigned long open_lock;
static DEFINE_SPINLOCK(scx_lock);
/* Bits of the WDCNFG register */
#define W_ENABLE 0x00fa /* Enable watchdog */
@ -59,7 +59,9 @@ static char expect_close;
static void scx200_wdt_ping(void)
{
spin_lock(&scx_lock);
outw(wdto_restart, scx200_cb_base + SCx200_WDT_WDTO);
spin_unlock(&scx_lock);
}
static void scx200_wdt_update_margin(void)
@ -73,9 +75,11 @@ static void scx200_wdt_enable(void)
printk(KERN_DEBUG NAME ": enabling watchdog timer, wdto_restart = %d\n",
wdto_restart);
spin_lock(&scx_lock);
outw(0, scx200_cb_base + SCx200_WDT_WDTO);
outb(SCx200_WDT_WDSTS_WDOVF, scx200_cb_base + SCx200_WDT_WDSTS);
outw(W_ENABLE, scx200_cb_base + SCx200_WDT_WDCNFG);
spin_unlock(&scx_lock);
scx200_wdt_ping();
}
@ -84,15 +88,17 @@ static void scx200_wdt_disable(void)
{
printk(KERN_DEBUG NAME ": disabling watchdog timer\n");
spin_lock(&scx_lock);
outw(0, scx200_cb_base + SCx200_WDT_WDTO);
outb(SCx200_WDT_WDSTS_WDOVF, scx200_cb_base + SCx200_WDT_WDSTS);
outw(W_DISABLE, scx200_cb_base + SCx200_WDT_WDCNFG);
spin_unlock(&scx_lock);
}
static int scx200_wdt_open(struct inode *inode, struct file *file)
{
/* only allow one at a time */
if (down_trylock(&open_semaphore))
if (test_and_set_bit(0, &open_lock))
return -EBUSY;
scx200_wdt_enable();
@ -101,13 +107,12 @@ static int scx200_wdt_open(struct inode *inode, struct file *file)
static int scx200_wdt_release(struct inode *inode, struct file *file)
{
if (expect_close != 42) {
if (expect_close != 42)
printk(KERN_WARNING NAME ": watchdog device closed unexpectedly, will not disable the watchdog timer\n");
} else if (!nowayout) {
else if (!nowayout)
scx200_wdt_disable();
}
expect_close = 0;
up(&open_semaphore);
clear_bit(0, &open_lock);
return 0;
}
@ -122,8 +127,7 @@ static int scx200_wdt_notify_sys(struct notifier_block *this,
return NOTIFY_DONE;
}
static struct notifier_block scx200_wdt_notifier =
{
static struct notifier_block scx200_wdt_notifier = {
.notifier_call = scx200_wdt_notify_sys,
};
@ -131,8 +135,7 @@ static ssize_t scx200_wdt_write(struct file *file, const char __user *data,
size_t len, loff_t *ppos)
{
/* check for a magic close character */
if (len)
{
if (len) {
size_t i;
scx200_wdt_ping();
@ -152,15 +155,15 @@ static ssize_t scx200_wdt_write(struct file *file, const char __user *data,
return 0;
}
static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
static long scx200_wdt_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 = {
static const struct watchdog_info ident = {
.identity = "NatSemi SCx200 Watchdog",
.firmware_version = 1,
.options = (WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING),
.options = WDIOF_SETTIMEOUT | WDIOF_KEEPALIVEPING,
};
int new_margin;
@ -168,7 +171,7 @@ static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
default:
return -ENOTTY;
case WDIOC_GETSUPPORT:
if(copy_to_user(argp, &ident, sizeof(ident)))
if (copy_to_user(argp, &ident, sizeof(ident)))
return -EFAULT;
return 0;
case WDIOC_GETSTATUS:
@ -195,18 +198,18 @@ static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
}
static const struct file_operations scx200_wdt_fops = {
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = scx200_wdt_write,
.ioctl = scx200_wdt_ioctl,
.open = scx200_wdt_open,
.owner = THIS_MODULE,
.llseek = no_llseek,
.write = scx200_wdt_write,
.unlocked_ioctl = scx200_wdt_ioctl,
.open = scx200_wdt_open,
.release = scx200_wdt_release,
};
static struct miscdevice scx200_wdt_miscdev = {
.minor = WATCHDOG_MINOR,
.name = "watchdog",
.fops = &scx200_wdt_fops,
.name = "watchdog",
.fops = &scx200_wdt_fops,
};
static int __init scx200_wdt_init(void)
@ -229,8 +232,6 @@ static int __init scx200_wdt_init(void)
scx200_wdt_update_margin();
scx200_wdt_disable();
sema_init(&open_semaphore, 1);
r = register_reboot_notifier(&scx200_wdt_notifier);
if (r) {
printk(KERN_ERR NAME ": unable to register reboot notifier");
@ -263,7 +264,7 @@ module_exit(scx200_wdt_cleanup);
/*
Local variables:
compile-command: "make -k -C ../.. SUBDIRS=drivers/char modules"
c-basic-offset: 8
compile-command: "make -k -C ../.. SUBDIRS=drivers/char modules"
c-basic-offset: 8
End:
*/