X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Fchar%2Fip27-rtc.c;h=ec9d0443d92c7a3f77b67832d064111119dfdead;hb=0016fe9d8a1ca99a4642735f41a7753d7c1f7e2b;hp=86e6538a77b05835b352001d170dba5335be284b;hpb=b5eb9513f7c1bee862ada22bf1489f53752686bd;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/char/ip27-rtc.c b/drivers/char/ip27-rtc.c
index 86e6538a77b..ec9d0443d92 100644
--- a/drivers/char/ip27-rtc.c
+++ b/drivers/char/ip27-rtc.c
@@ -27,6 +27,7 @@
 #include <linux/bcd.h>
 #include <linux/module.h>
 #include <linux/kernel.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/miscdevice.h>
 #include <linux/ioport.h>
@@ -163,15 +164,18 @@ static long rtc_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 
 static int rtc_open(struct inode *inode, struct file *file)
 {
+	lock_kernel();
 	spin_lock_irq(&rtc_lock);
 
 	if (rtc_status & RTC_IS_OPEN) {
 		spin_unlock_irq(&rtc_lock);
+		unlock_kernel();
 		return -EBUSY;
 	}
 
 	rtc_status |= RTC_IS_OPEN;
 	spin_unlock_irq(&rtc_lock);
+	unlock_kernel();
 
 	return 0;
 }