Commit 75fb0e32 authored by Johan Hedberg's avatar Johan Hedberg
Browse files

Bluetooth: Fix init sequence for some CSR based controllers 



Some CSR controllers will generate a spontaneous reset during init and
just eat up any pending command without sending a command complete for
it. This patch solves the issue by just resending whatever was the last
sent command. hci_send_cmd is not used since we need to bypass all other
commands in the send queue.

Signed-off-by: default avatarJohan Hedberg <johan.hedberg@intel.com>
Acked-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent 8b90129c

net/bluetooth/hci_core.c

+21 −1
Original line number Diff line number Diff line
@@ -82,9 +82,29 @@ void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result) 
	/* If this is the init phase check if the completed command matches

	 * the last init command, and if not just return.

	 */

	if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd)

	if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {

		struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;

		struct sk_buff *skb;



		/* Some CSR based controllers generate a spontaneous

		 * reset complete event during init and any pending

		 * command will never be completed. In such a case we

		 * need to resend whatever was the last sent

		 * command.

		 */



		if (cmd != HCI_OP_RESET || sent->opcode == HCI_OP_RESET)

			return;



		skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);

		if (skb) {

			skb_queue_head(&hdev->cmd_q, skb);

			queue_work(hdev->workqueue, &hdev->cmd_work);

		}



		return;

	}



	if (hdev->req_status == HCI_REQ_PEND) {

		hdev->req_result = result;

		hdev->req_status = HCI_REQ_DONE;

CRA Git | Maintained and supported by SUSTech CRA and CCSE