Bluetooth: Fix unnecessary error message for HCI request completion

commit 1629db9c75342325868243d6bca5853017d91cf8 upstream.

In case a command which completes in Command Status was sent using the
hci_cmd_send-family of APIs there would be a misleading error in the
hci_get_cmd_complete function, since the code would be trying to fetch
the Command Complete parameters when there are none.

Avoid the misleading error and silently bail out from the function in
case the received event is a command status.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Acked-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Tested-by Adam Ford <aford173@gmail.com> #4.19.16
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c
index ef9928d7b4fb5abd497e01a45261aa5dab8ac1e0..ac2826ce162b902a0d1e973744707645ec06dae5 100644 (file)
--- a/net/bluetooth/hci_event.c
+++ b/net/bluetooth/hci_event.c
@@ -5711,6 +5711,12 @@ static bool hci_get_cmd_complete(struct hci_dev *hdev, u16 opcode,
                return true;
        }
 
+       /* Check if request ended in Command Status - no way to retreive
+        * any extra parameters in this case.
+        */
+       if (hdr->evt == HCI_EV_CMD_STATUS)
+               return false;
+
        if (hdr->evt != HCI_EV_CMD_COMPLETE) {
                bt_dev_err(hdev, "last event is not cmd complete (0x%2.2x)",
                           hdr->evt);