diff --git a/[refs] b/[refs]
index 9aad66c79da0..ec1eb55e10d0 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 46787b481be00d5443d385480d12470728406cf4
+refs/heads/master: 1bcaa0bd6fd5b510dd9f1ba2da114d3f1253af61
diff --git a/trunk/drivers/isdn/i4l/isdn_common.c b/trunk/drivers/isdn/i4l/isdn_common.c
index 0f3c66de69bc..5158c606ff5b 100644
--- a/trunk/drivers/isdn/i4l/isdn_common.c
+++ b/trunk/drivers/isdn/i4l/isdn_common.c
@@ -1732,7 +1732,7 @@ isdn_open(struct inode *ino, struct file *filep)
 	int chidx;
 	int retval = -ENODEV;
 
-
+	lock_kernel();
 	if (minor == ISDN_MINOR_STATUS) {
 		infostruct *p;
 
@@ -1783,6 +1783,7 @@ isdn_open(struct inode *ino, struct file *filep)
 #endif
  out:
 	nonseekable_open(ino, filep);
+	unlock_kernel();
 	return retval;
 }