vserver 1.9.3

[linux-2.6.git] / drivers / char / watchdog / scx200_wdt.c

diff --git a/drivers/char/watchdog/scx200_wdt.c b/drivers/char/watchdog/scx200_wdt.c
index 4020ab0..983e9e9 100644 (file)
--- a/drivers/char/watchdog/scx200_wdt.c
+++ b/drivers/char/watchdog/scx200_wdt.c
@@ -25,6 +25,7 @@
 #include <linux/watchdog.h>
 #include <linux/notifier.h>
 #include <linux/reboot.h>
+#include <linux/fs.h>
 #include <linux/pci.h>
 #include <linux/scx200.h>
 
@@ -100,7 +101,7 @@ static int scx200_wdt_open(struct inode *inode, struct file *file)
                return -EBUSY;
        scx200_wdt_enable();
 
-       return 0;
+       return nonseekable_open(inode, file);
 }
 
 static int scx200_wdt_release(struct inode *inode, struct file *file)
@@ -131,12 +132,9 @@ static struct notifier_block scx200_wdt_notifier =
        .notifier_call = scx200_wdt_notify_sys,
 };
 
-static ssize_t scx200_wdt_write(struct file *file, const char *data,
+static ssize_t scx200_wdt_write(struct file *file, const char __user *data,
                                     size_t len, loff_t *ppos)
 {
-       if (ppos != &file->f_pos)
-               return -ESPIPE;
-
        /* check for a magic close character */
        if (len)
        {
@@ -162,6 +160,8 @@ static ssize_t scx200_wdt_write(struct file *file, const char *data,
 static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
        unsigned int cmd, unsigned long arg)
 {
+       void __user *argp = (void __user *)arg;
+       int __user *p = argp;
        static struct watchdog_info ident = {
                .identity = "NatSemi SCx200 Watchdog",
                .firmware_version = 1,
@@ -173,20 +173,19 @@ static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
        default:
                return -ENOIOCTLCMD;
        case WDIOC_GETSUPPORT:
-               if(copy_to_user((struct watchdog_info *)arg, &ident,
-                               sizeof(ident)))
+               if(copy_to_user(argp, &ident, sizeof(ident)))
                        return -EFAULT;
                return 0;
        case WDIOC_GETSTATUS:
        case WDIOC_GETBOOTSTATUS:
-               if (put_user(0, (int *)arg))
+               if (put_user(0, p))
                        return -EFAULT;
                return 0;
        case WDIOC_KEEPALIVE:
                scx200_wdt_ping();
                return 0;
        case WDIOC_SETTIMEOUT:
-               if (get_user(new_margin, (int *)arg))
+               if (get_user(new_margin, p))
                        return -EFAULT;
                if (new_margin < 1)
                        return -EINVAL;
@@ -194,7 +193,7 @@ static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
                scx200_wdt_update_margin();
                scx200_wdt_ping();
        case WDIOC_GETTIMEOUT:
-               if (put_user(margin, (int *)arg))
+               if (put_user(margin, p))
                        return -EFAULT;
                return 0;
        }
@@ -202,6 +201,7 @@ static int scx200_wdt_ioctl(struct inode *inode, struct file *file,
 
 static struct file_operations scx200_wdt_fops = {
        .owner   = THIS_MODULE,
+       .llseek  = no_llseek,
        .write   = scx200_wdt_write,
        .ioctl   = scx200_wdt_ioctl,
        .open    = scx200_wdt_open,
@@ -220,10 +220,16 @@ static int __init scx200_wdt_init(void)
 
        printk(KERN_DEBUG NAME ": NatSemi SCx200 Watchdog Driver\n");
 
-       /* First check that this really is a NatSemi SCx200 CPU */
+       /*
+        * First check that this really is a NatSemi SCx200 CPU or a Geode
+        * SC1100 processor
+        */
        if ((pci_find_device(PCI_VENDOR_ID_NS,
                             PCI_DEVICE_ID_NS_SCx200_BRIDGE,
-                            NULL)) == NULL)
+                            NULL)) == NULL
+           && (pci_find_device(PCI_VENDOR_ID_NS,
+                               PCI_DEVICE_ID_NS_SC1100_BRIDGE,
+                               NULL)) == NULL)
                return -ENODEV;
 
        /* More sanity checks, verify that the configuration block is there */