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 C88F8FEEF27 for ; Tue, 7 Apr 2026 11:49:02 +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=yuHXpV2guMEqjCofGpLmsHbbxGl7ArDogqOj9FM3zls=; b=GPRJ9SiekMY3Ox6+wr6LsprXqs qpQ2KXHmCgQa2G0HEXM7yEGNtH4ujx/K3XUS+0nY75jv2tulrQzlF5Hm4udi5C1oAcT5Us0P5pCKm h9lXiTCpdaMCwDGGobL4IwB3KgRG7MdqwPIN8DNS//uuNoDY8ZtGNPhR5hNust+elyabyFUFsYwEP ZDHSFygW99lvgFdLhZW9b24zg9OqyHrk6VR7Hrg2tsaO8I+wO8sUSRfyesWUsmkf4lDiYVAp8KxTX 7lRPyw7Y6lhNcclYYFvYrOa5qCFyRLEit/Svwz1ne5y0hs2hudI3KJB43cF+ytcsrJkYLcPdRcC9p ycNEC13g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wA4vU-00000006OrN-3Vml; Tue, 07 Apr 2026 11:49:00 +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 1wA4vS-00000006Oqb-1mmq for linux-mediatek@lists.infradead.org; Tue, 07 Apr 2026 11:48:59 +0000 X-UUID: c1b0cd3c327711f1a6de359d7043e138-20260407 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=yuHXpV2guMEqjCofGpLmsHbbxGl7ArDogqOj9FM3zls=; b=mwmubiC111WxeomLM5gvjLXDSW+fSKQ7pt8coWUrIqBXTBq04nAN3WzCfDXfmH7Vtfkz4VkSm/MLtk6ZJTwy25auf+NiKGgI2n/jAxw9cgraGWkUlv0ZBIwd3fwUFG4CQ14muo5SqKycDrsjtYpQC/tWtBWUQzt4VfHDkIryX7M=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.12,REQID:d9f7d45e-fe50-4ca0-ac57-163dd56d72c4,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:8f1f9524-cb5c-4236-a89a-9a7fb20c9bc4,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: c1b0cd3c327711f1a6de359d7043e138-20260407 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1025959623; Tue, 07 Apr 2026 04:48:55 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n2.mediatek.inc (172.21.101.187) 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 19:48:53 +0800 Received: from mtksitap99.mediatek.inc (10.233.130.16) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.2562.29 via Frontend Transport; Tue, 7 Apr 2026 19:48:53 +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 v2] Bluetooth: btmtk: add event filter to filter specific event Date: Tue, 7 Apr 2026 19:48:51 +0800 Message-ID: <20260407114851.3087886-1-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-20260407_044858_480706_180AF23B X-CRM114-Status: GOOD ( 12.31 ) 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 Add an event filter to filter event with specific opcode to prevent BT stack from receiving unexpected event. Event with opcode 0xfc5d is generated when MediaTek's Bluetooth enable firmware logs and is not expected to be sent to userspace. Signed-off-by: Chris Lu --- v1 -> v2: update commit message --- 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