1 files changed, 11 insertions, 3 deletions

diff --git a/drivers/bluetooth/hci_vhci.c b/drivers/bluetooth/hci_vhci.c
index 0638730a4a19..d97700aa54a9 100644
--- a/drivers/bluetooth/hci_vhci.c
+++ b/drivers/bluetooth/hci_vhci.c
@@ -28,6 +28,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/slab.h>
+#include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/errno.h>
 #include <linux/sched.h>
@@ -263,9 +264,11 @@ static int vhci_open(struct inode *inode, struct file *file)
         skb_queue_head_init(&data->readq);
         init_waitqueue_head(&data->read_wait);
 
+        lock_kernel();
         hdev = hci_alloc_dev();
         if (!hdev) {
                 kfree(data);
+                unlock_kernel();
                 return -ENOMEM;
         }
 
@@ -286,10 +289,12 @@ static int vhci_open(struct inode *inode, struct file *file)
                 BT_ERR("Can't register HCI device");
                 kfree(data);
                 hci_free_dev(hdev);
+                unlock_kernel();
                 return -EBUSY;
         }
 
         file->private_data = data;
+        unlock_kernel();
 
         return nonseekable_open(inode, file);
 }
@@ -313,18 +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 = {