From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 190F8E9D814 for ; Tue, 7 Apr 2026 06:48:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type: Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From: Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender :Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=9MpSWEeOtFVXl58+rDfFFbpljSaaJoXfG6V58eCnX3o=; b=UFmektxIYnl0rZ5SWfBQu8U+QN SzGZ2NhnwQEFEVrGx3gukv8HxLVWALat8cY+qVNcpZ1zClQimdTxkNV6BzOv/IoNPmOmtxanN8QwR rvtx8HaDgBjQy5cBH+u3+wobNu1/j19j+RUh0rNCKRmLGgrF+tRUdIE10AOpwrcZNngvvcTKifVaD 5ai6EbozpN3gO6Ai9y5MgDqo5l+XSyPOVlBKwXgVMyKerirb9oy+E2+aYsCIA/CUtAD1Epg2N4H5Z BNB/Gvq0i5D9dHaCgMsDO0nzWX80Gnv0UTLYjg0uRmPL6MtxoIT2vk8L3Jc5c+X94+qlqeeEaXDIm Cngo9StA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wA0EO-000000061WD-1MVR; Tue, 07 Apr 2026 06:48:12 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wA0EM-000000061Vl-2NoQ for linux-mediatek@lists.infradead.org; Tue, 07 Apr 2026 06:48:11 +0000 X-UUID: ba861cb2324d11f1a6de359d7043e138-20260406 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=9MpSWEeOtFVXl58+rDfFFbpljSaaJoXfG6V58eCnX3o=; b=uU5y19o9CgafvqY5OoutrtKyB+NDd2KG8yTEgxnlMXtlhmeuVwfG+A0hlKa4xoKy6yLS6/UmPSwdMIbdubjHLHp0TsALgM0ZEHE15TLFNMk/IrFFJ6HbzxKBt5GWnokBA2y4g2MS5jLybURtHLoBPbB4J3zrSDKEj62Tk6OhAy0=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.12,REQID:ae6367ab-6597-4d29-8f8d-7732aaf297f1,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:e7bac3a,CLOUDID:ec17218f-6df4-4a3d-a7a4-fbdc42d669ce,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102|836|865|888|898,TC:-5,Content:0| 15|50,EDM:-3,IP:nil,URL:0,File:130,RT:0,Bulk:nil,QS:nil,BEC:-1,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: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: ba861cb2324d11f1a6de359d7043e138-20260406 Received: from mtkmbs09n2.mediatek.inc [(172.21.101.94)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1721314805; Mon, 06 Apr 2026 23:48:04 -0700 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by MTKMBS14N1.mediatek.inc (172.21.101.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Tue, 7 Apr 2026 14:48:02 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Tue, 7 Apr 2026 14:48:02 +0800 From: Chris Lu To: Marcel Holtmann , Johan Hedberg , Luiz Von Dentz CC: Sean Wang , Will Lee , SS Wu , Steve Lee , linux-bluetooth , linux-kernel , linux-mediatek , Chris Lu Subject: [PATCH v1] Bluetooth: btmtk: add event filter to filter specific event Date: Tue, 7 Apr 2026 14:47:59 +0800 Message-ID: <20260407064759.3036650-1-chris.lu@mediatek.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260406_234810_651090_47C4E3F2 X-CRM114-Status: GOOD ( 12.51 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Due to some Bluetooth hosts have mechanism to detect invalid events, causing abnormal behavior. Add a event filter to prevent debugging events from being sent to host. Signed-off-by: Chris Lu --- drivers/bluetooth/btmtk.c | 22 ++++++++++++++++++++++ drivers/bluetooth/btmtk.h | 7 +++++++ drivers/bluetooth/btusb.c | 2 ++ 3 files changed, 31 insertions(+) diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c index 55516b4602db..302d6ddf9062 100644 --- a/drivers/bluetooth/btmtk.c +++ b/drivers/bluetooth/btmtk.c @@ -1503,6 +1503,28 @@ int btmtk_usb_shutdown(struct hci_dev *hdev) return 0; } EXPORT_SYMBOL_GPL(btmtk_usb_shutdown); + +int btmtk_recv_event(struct hci_dev *hdev, struct sk_buff *skb) +{ + struct hci_event_hdr *hdr = (void *)skb->data; + + if (hdr->evt == HCI_EV_CMD_COMPLETE) { + struct hci_ev_cmd_complete *ec; + u16 opcode; + + ec = (void *)(skb->data + HCI_EVENT_HDR_SIZE); + opcode = __le16_to_cpu(ec->opcode); + + /* Filter vendor opcode */ + if (opcode == 0xfc5d) { + kfree_skb(skb); + return 0; + } + } + + return hci_recv_frame(hdev, skb); +} +EXPORT_SYMBOL_GPL(btmtk_recv_event); #endif MODULE_AUTHOR("Sean Wang "); diff --git a/drivers/bluetooth/btmtk.h b/drivers/bluetooth/btmtk.h index adaf385626ee..08b73927c8f3 100644 --- a/drivers/bluetooth/btmtk.h +++ b/drivers/bluetooth/btmtk.h @@ -218,6 +218,8 @@ int btmtk_usb_suspend(struct hci_dev *hdev); int btmtk_usb_setup(struct hci_dev *hdev); int btmtk_usb_shutdown(struct hci_dev *hdev); + +int btmtk_recv_event(struct hci_dev *hdev, struct sk_buff *skb); #else static inline int btmtk_set_bdaddr(struct hci_dev *hdev, @@ -296,4 +298,9 @@ static inline int btmtk_usb_shutdown(struct hci_dev *hdev) { return -EOPNOTSUPP; } + +static inline int btmtk_recv_event(struct hci_dev *hdev, struct sk_buff *skb) +{ + return -EOPNOTSUPP; +} #endif diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index f9d515ee9124..daf8a387e660 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -4150,6 +4150,8 @@ static int btusb_probe(struct usb_interface *intf, } else if (id->driver_info & BTUSB_MEDIATEK) { /* Allocate extra space for Mediatek device */ priv_size += sizeof(struct btmtk_data); + + data->recv_event = btmtk_recv_event; } data->recv_acl = hci_recv_frame; -- 2.45.2