1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/bluetooth/hci_vhci.c b/drivers/bluetooth/hci_vhci.c
index 7734bc9af3ca..d97700aa54a9 100644
--- a/drivers/bluetooth/hci_vhci.c
+++ b/drivers/bluetooth/hci_vhci.c
@@ -318,18 +318,21 @@ static int vhci_release(struct inode *inode, struct file *file)
 static int vhci_fasync(int fd, struct file *file, int on)
 {
         struct vhci_data *data = file->private_data;
-        int err;
+        int err = 0;
 
+        lock_kernel();
         err = fasync_helper(fd, file, on, &data->fasync);
         if (err < 0)
-                return err;
+                goto out;
 
         if (on)
                 data->flags |= VHCI_FASYNC;
         else
                 data->flags &= ~VHCI_FASYNC;
 
-        return 0;
+out:
+        unlock_kernel();
+        return err;
 }
 
 static const struct file_operations vhci_fops = {