X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=drivers%2Frtc%2Frtc-m41t80.c;h=0a19c06019be6c32ea71ccc3849cd7d108040385;hb=3a533374283aea50eab3976d8a6d30532175f009;hp=316bfaa80872195badfeda9ec87de81265d77d96;hpb=c65a3500b2947d344862da8cce626b7cc7ec5758;p=linux-2.6

diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c
index 316bfaa808..0a19c06019 100644
--- a/drivers/rtc/rtc-m41t80.c
+++ b/drivers/rtc/rtc-m41t80.c
@@ -15,7 +15,9 @@
 
 #include <linux/module.h>
 #include <linux/init.h>
+#include <linux/kernel.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/string.h>
 #include <linux/i2c.h>
 #include <linux/rtc.h>
@@ -654,12 +656,16 @@ static int wdt_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
 static int wdt_open(struct inode *inode, struct file *file)
 {
 	if (MINOR(inode->i_rdev) == WATCHDOG_MINOR) {
-		if (test_and_set_bit(0, &wdt_is_open))
+		lock_kernel();
+		if (test_and_set_bit(0, &wdt_is_open)) {
+			unlock_kernel();
 			return -EBUSY;
+		}
 		/*
 		 *	Activate
 		 */
 		wdt_is_open = 1;
+		unlock_kernel();
 		return 0;
 	}
 	return -ENODEV;
@@ -803,6 +809,7 @@ static int m41t80_probe(struct i2c_client *client,
 
 #ifdef CONFIG_RTC_DRV_M41T80_WDT
 	if (clientdata->features & M41T80_FEATURE_HT) {
+		save_client = client;
 		rc = misc_register(&wdt_dev);
 		if (rc)
 			goto exit;
@@ -811,7 +818,6 @@ static int m41t80_probe(struct i2c_client *client,
 			misc_deregister(&wdt_dev);
 			goto exit;
 		}
-		save_client = client;
 	}
 #endif
 	return 0;