linux-kernel - [PATCH 3/4] Bluetooth: btusb: mediatek: reset the device as WMT failed

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Date:   Tue, 13 Sep 2022 06:18:12 +0800
From:   <sean.wang@...iatek.com>
To:     <marcel@...tmann.org>, <johan.hedberg@...il.com>,
        <luiz.dentz@...il.com>
CC:     <sean.wang@...iatek.com>, <Soul.Huang@...iatek.com>,
        <YN.Chen@...iatek.com>, <Leon.Yen@...iatek.com>,
        <Eric-SY.Chang@...iatek.com>, <Deren.Wu@...iatek.com>,
        <km.lin@...iatek.com>, <robin.chiu@...iatek.com>,
        <Eddie.Chen@...iatek.com>, <ch.yeh@...iatek.com>,
        <posh.sun@...iatek.com>, <ted.huang@...iatek.com>,
        <Stella.Chang@...iatek.com>, <Tom.Chou@...iatek.com>,
        <steve.lee@...iatek.com>, <jsiuda@...gle.com>,
        <frankgor@...gle.com>, <abhishekpandit@...gle.com>,
        <michaelfsun@...gle.com>, <abhishekpandit@...omium.org>,
        <mcchou@...omium.org>, <shawnku@...gle.com>,
        <linux-bluetooth@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/4] Bluetooth: btusb: mediatek: reset the device as WMT failed

From: Sean Wang <sean.wang@...iatek.com>

Reset the BT device whenever the driver detected any WMT failure happened
to recover such kind of system-level error as soon as possible.

Signed-off-by: Sean Wang <sean.wang@...iatek.com>
---
 drivers/bluetooth/btusb.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
index 653f57a98233..dc86726c8271 100644
--- a/drivers/bluetooth/btusb.c
+++ b/drivers/bluetooth/btusb.c
@@ -2576,6 +2576,10 @@ static int btusb_mtk_hci_wmt_sync(struct hci_dev *hdev,
 	data->evt_skb = NULL;
 err_free_wc:
 	kfree(wc);
+
+	if (err < 0)
+		btmtk_reset_sync(hdev);
+
 	return err;
 }
 
-- 
2.25.1