Bluetooth: Fix response for mgmt_start_discovery when powered off

We should return a ENETDOWN status response if the adapter is powered
off (i.e. the HCI_UP flag isn't set).

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>

1 files changed, 5 insertions, 0 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index e33b12e09270..af077abdfa98 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -1619,6 +1619,11 @@ static int start_discovery(struct sock *sk, u16 index)
 
         hci_dev_lock_bh(hdev);
 
+        if (!test_bit(HCI_UP, &hdev->flags)) {
+                err = cmd_status(sk, index, MGMT_OP_START_DISCOVERY, ENETDOWN);
+                goto failed;
+        }
+
         cmd = mgmt_pending_add(sk, MGMT_OP_START_DISCOVERY, index, NULL, 0);
         if (!cmd) {
                 err = -ENOMEM;