linux-kernel - [PATCH] Bluetooth: btusb: mediatek: Add usb reset for firmware setup failure

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Date: Fri, 12 Apr 2024 16:41:28 +0800
From: Hao Qin <hao.qin@...iatek.com>
To: Marcel Holtmann <marcel@...tmann.org>, Johan Hedberg
	<johan.hedberg@...il.com>, Luiz Von Dentz <luiz.dentz@...il.com>
CC: Sean Wang <sean.wang@...iatek.com>, Deren Wu <deren.Wu@...iatek.com>,
	Aaron Hou <aaron.hou@...iatek.com>, Chris Lu <chris.lu@...iatek.com>, "Steve
 Lee" <steve.lee@...iatek.com>, linux-bluetooth
	<linux-bluetooth@...r.kernel.org>, linux-kernel
	<linux-kernel@...r.kernel.org>, linux-mediatek
	<linux-mediatek@...ts.infradead.org>, Hao Qin <hao.qin@...iatek.com>
Subject: [PATCH] Bluetooth: btusb: mediatek: Add usb reset for firmware setup failure

Add usb reset to recover BT device from a firmware setup failure,
it will restore the device to its original state and attempt setup
firmware again.

Signed-off-by: Hao Qin <hao.qin@...iatek.com>
---
 drivers/bluetooth/btusb.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 4c0cc13adb47..c5aab361795e 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -3160,6 +3160,9 @@ static int btusb_mtk_setup(struct hci_dev *hdev)
 						btusb_mtk_hci_wmt_sync);
 		if (err < 0) {
 			bt_dev_err(hdev, "Failed to set up firmware (%d)", err);
+			btusb_stop_traffic(data);
+			usb_kill_anchored_urbs(&data->tx_anchor);
+			usb_queue_reset_device(data->intf);
 			return err;
 		}
 
-- 
2.18.0