Re: [WATCHDOG] sa1100_wdt.c sparse cleanups

[Ian Campbell]

On Sat, 2005-11-05 at 10:10 +0000, Russell King wrote:

> It's probably better to use a union with these, eg:

The common idiom in the watchdog drivers seems to be to use separate
variables. I'll leave it up to Wim if he wants to change that.

The following makes drivers/char/watchdog/sa1100_wdt.c sparse clean.

Signed-off-by: Ian Campbell <icampbell@xxxxxxxxx>

Index: 2.6/drivers/char/watchdog/sa1100_wdt.c
===================================================================
--- 2.6.orig/drivers/char/watchdog/sa1100_wdt.c	2005-11-03 11:02:05.000000000 +0000
+++ 2.6/drivers/char/watchdog/sa1100_wdt.c	2005-11-07 09:51:47.000000000 +0000
@@ -74,7 +74,7 @@
 	return 0;
 }
 
-static ssize_t sa1100dog_write(struct file *file, const char *data, size_t len, loff_t *ppos)
+static ssize_t sa1100dog_write(struct file *file, const char __user *data, size_t len, loff_t *ppos)
 {
 	if (len)
 		/* Refresh OSMR3 timer. */
@@ -93,23 +93,24 @@
 {
 	int ret = -ENOIOCTLCMD;
 	int time;
+	void __user *argp = (void __user *)arg;
+	int __user *p = argp;
 
 	switch (cmd) {
 	case WDIOC_GETSUPPORT:
-		ret = copy_to_user((struct watchdog_info *)arg, &ident,
-				   sizeof(ident)) ? -EFAULT : 0;
+		ret = copy_to_user(argp, &ident, sizeof(ident)) ? -EFAULT : 0;
 		break;
 
 	case WDIOC_GETSTATUS:
-		ret = put_user(0, (int *)arg);
+		ret = put_user(0, p);
 		break;
 
 	case WDIOC_GETBOOTSTATUS:
-		ret = put_user(boot_status, (int *)arg);
+		ret = put_user(boot_status, p);
 		break;
 
 	case WDIOC_SETTIMEOUT:
-		ret = get_user(time, (int *)arg);
+		ret = get_user(time, p);
 		if (ret)
 			break;
 
@@ -123,7 +124,7 @@
 		/*fall through*/
 
 	case WDIOC_GETTIMEOUT:
-		ret = put_user(pre_margin / OSCR_FREQ, (int *)arg);
+		ret = put_user(pre_margin / OSCR_FREQ, p);
 		break;
 
 	case WDIOC_KEEPALIVE:

-- 
Ian Campbell, Senior Design Engineer
                                        Web: http://www.arcom.com
Arcom, Clifton Road, 			Direct: +44 (0)1223 403 465
Cambridge CB1 7EA, United Kingdom	Phone:  +44 (0)1223 411 200


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