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-rw-r--r--drivers/isdn/i4l/isdn_common.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index 0f3c66de69b..5158c606ff5 100644
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/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;
}