From patchwork Mon Sep 23 08:47:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Lu X-Patchwork-Id: 830260 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 00F0D3032A; Mon, 23 Sep 2024 08:47:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727081236; cv=none; b=JMnZdOsbf9gkD6mNaiIyf8f4Tb9vg26bIQ5mHuFC3znanKsMYVD0D8DGkd7F45RmjmqFFFDMUPz1pi9Q/z7i9A/6UjRD6XMZkYLOE50dOejWWfXsvyah23zZ7Y5PPp3OiJXRKO6Xmh5JHJ/Yj4TAvYg52Bwf3I1nIZkdwB82jIs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727081236; c=relaxed/simple; bh=3eBThKPx00BqamOCCs/0dhkLCI+140Bn9iiw/lSAbS0=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=ed8/wcdxI6TE3KeTnrXKReEgZDlHnFZNcaj2TQewQkmWi63qzjkj/FqKV50KJguELAXVzvl/DMsLlCul/qaKByZXPyGqCObaEpq+PzXkOrwnlz583G8lrVYPMT/X8luXegYUuC16WEsxpkHAEv4f3SDLEdAuAR7RYnep9sb57fA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=gB0nzu+R; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="gB0nzu+R" X-UUID: 6aeaa026798811efb66947d174671e26-20240923 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=YrLQBkr+4O7imCtu0pzv5R4puxbMisvPpZU/zFZINAI=; b=gB0nzu+RJ9z7B9RMTB8UVzV5axbU5sPQMvt6kHSto4DP7JKLMJKZSj5X0+C77qmcsRLkUNZlyz4W+8KT/a6qsWPKz81T46DddCRDv4gAb3fvMvX8G2CH6QR1Xda8cB/V2gDt1m9NFKNrr9ncCpdT9QTFlwzjhkgaqV5Ix9vOTeE=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.41, REQID:0b5f89bc-b52b-4a54-a86a-11cf3d3c6366, IP:0, U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:6dc6a47, CLOUDID:a9276a9e-8e9a-4ac1-b510-390a86b53c0a, B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,RT:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES :1,SPR:NO,DKR:0,DKP:0,BRR:0,BRE:0,ARC:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: 6aeaa026798811efb66947d174671e26-20240923 Received: from mtkmbs09n2.mediatek.inc [(172.21.101.94)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 394688150; Mon, 23 Sep 2024 16:47:08 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs13n2.mediatek.inc (172.21.101.108) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Mon, 23 Sep 2024 16:47:08 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Mon, 23 Sep 2024 16:47:08 +0800 From: Chris Lu To: Marcel Holtmann , Johan Hedberg , Luiz Von Dentz CC: Sean Wang , Aaron Hou , Steve Lee , linux-bluetooth , linux-kernel , linux-mediatek , Chris Lu Subject: [PATCH v3 3/4] Bluetooth: btusb: mediatek: add intf release flow when usb disconnect Date: Mon, 23 Sep 2024 16:47:04 +0800 Message-ID: <20240923084705.14123-4-chris.lu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240923084705.14123-1-chris.lu@mediatek.com> References: <20240923084705.14123-1-chris.lu@mediatek.com> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 MediaTek claim an special usb intr interface for ISO data transmission. The interface need to be released before unregistering hci device when usb disconnect. Removing BT usb dongle without properly releasing the interface may cause Kernel panic while unregister hci device. Signed-off-by: Chris Lu --- drivers/bluetooth/btusb.c | 20 +++++++++++++++----- 1 file changed, 15 insertions(+), 5 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index dfc42bdc8aaf..a434aefe68f2 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -2614,9 +2614,9 @@ static void btusb_mtk_claim_iso_intf(struct btusb_data *data) set_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags); } -static void btusb_mtk_release_iso_intf(struct btusb_data *data) +static void btusb_mtk_release_iso_intf(struct hci_dev *hdev) { - struct btmtk_data *btmtk_data = hci_get_priv(data->hdev); + struct btmtk_data *btmtk_data = hci_get_priv(hdev); if (btmtk_data->isopkt_intf) { usb_kill_anchored_urbs(&btmtk_data->isopkt_anchor); @@ -2632,6 +2632,16 @@ static void btusb_mtk_release_iso_intf(struct btusb_data *data) clear_bit(BTMTK_ISOPKT_OVER_INTR, &btmtk_data->flags); } +static int btusb_mtk_disconnect(struct hci_dev *hdev) +{ + /* This function describes the specific additional steps taken by MediaTek + * when Bluetooth usb driver's resume function is called. + */ + btusb_mtk_release_iso_intf(hdev); + + return 0; +} + static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data) { struct btusb_data *data = hci_get_drvdata(hdev); @@ -2649,7 +2659,7 @@ static int btusb_mtk_reset(struct hci_dev *hdev, void *rst_data) return err; if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) - btusb_mtk_release_iso_intf(data); + btusb_mtk_release_iso_intf(hdev); btusb_stop_traffic(data); usb_kill_anchored_urbs(&data->tx_anchor); @@ -2703,14 +2713,13 @@ static int btusb_mtk_setup(struct hci_dev *hdev) static int btusb_mtk_shutdown(struct hci_dev *hdev) { - struct btusb_data *data = hci_get_drvdata(hdev); struct btmtk_data *btmtk_data = hci_get_priv(hdev); int ret; ret = btmtk_usb_shutdown(hdev); if (test_bit(BTMTK_ISOPKT_RUNNING, &btmtk_data->flags)) - btusb_mtk_release_iso_intf(data); + btusb_mtk_release_iso_intf(hdev); return ret; } @@ -3824,6 +3833,7 @@ static int btusb_probe(struct usb_interface *intf, data->recv_acl = btmtk_usb_recv_acl; data->suspend = btmtk_usb_suspend; data->resume = btmtk_usb_resume; + data->disconnect = btusb_mtk_disconnect; } if (id->driver_info & BTUSB_SWAVE) {