double unlock in bt_rfkill_poll()

double unlock in bt_rfkill_poll()

[Dan Carpenter]

Hello,

My source checker tool (http://repo.or.cz/w/smatch.git) found an issue in 
bt_rfkill_poll().  I don't know the correct way to fix this.

We unlock on line 337 and again on line 342.

drivers/platform/x86/toshiba_acpi.c
   334          hci_result = hci_get_radio_state(&value);
   335          if (hci_result != HCI_SUCCESS) {
   336                  /* Can't do anything useful */
   337                  mutex_unlock(&dev->mutex);
   338          }
   339  
   340          new_rfk_state = value;
   341  
   342          mutex_unlock(&dev->mutex);

regards,
dan carpenter