From mboxrd@z Thu Jan 1 00:00:00 1970 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 298B23F54A4; Wed, 26 Aug 2026 11:16:25 +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=1787742993; cv=none; b=Fdyqu5LyMU2mL1Up0CnzC8GweG2XS/0rOH4n0oQvXdJHvkN2ofm+EZWQ/SI58+IFDk0nUrW3Q7/8bsOA6NYRhQjeNue55hIuoD0ejpsRVIXA6Gta7GAi4OQSCbDzpm3FBRCEn1lMtbmvApuSGKgLxHXZy4vZzQSTPSIlV1aBg0o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787742993; c=relaxed/simple; bh=jSUAEUMfR2GHFnjIc3LI5GUQ2YrXQD0g738z8x3PLN4=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=TJaQhMy0UgFBKREYW/LkNq8sCqXQ8/RKzwiVI/eXFb2rA1uIJejdayhm3yTBriMhsy3GNqRl9VX9wDXFP6g0q4abYIiXmDroHaVyS/0QdNZ6dsul0FN1j6ZzKz9t3tiJnbS8ydFuwIeNKGBEjqW+KyCEK8gG7WExNuoJHJsIxr4= 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=dOXG+q1S; 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="dOXG+q1S" X-UUID: 904e9a1ca13f11f1b1788b6acf885367-20260826 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=3w6x5i5cNJ44cvxGIR3mU/+8CUnMl13CMX4jUQ9qkts=; b=dOXG+q1S6VSW9uv0SBwdL8CLS2sdRfLJtaJU2MGWcKIk4BV/pN+btf0PuiOWamLN/BGQMiNeCCPFHw1A9efruG594BoQWOW3KmyOMKkJCidiDdVuy5hfKr0+roQ7Sqbt5YSL9WK/iBG/ToKBFxuSj7bqQkdr1skDlEyNcoOj+Uc=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.19,REQID:f9e0655d-cd75-42de-8b21-53c2e3da6cd3,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:7db8b62,CLOUDID:81601f0f-439c-4e65-a310-420f2383927e,B ulkID:nil,BulkQuantity:0,SF:102|836|865|888|898,TC:-5,Content:0|15|50|99,E DM:-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: 904e9a1ca13f11f1b1788b6acf885367-20260826 Received: from mtkmbs11n2.mediatek.inc [(172.21.101.187)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 570808196; Wed, 26 Aug 2026 19:16:20 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs13n1.mediatek.inc (172.21.101.193) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.29; Wed, 26 Aug 2026 19:16:18 +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; Wed, 26 Aug 2026 19:16:18 +0800 From: Chris Lu To: Marcel Holtmann , Johan Hedberg , Luiz Von Dentz CC: Sean Wang , Will Lee , SS Wu , linux-bluetooth , linux-kernel , linux-mediatek , Chris Lu Subject: [PATCH] Bluetooth: btmtk: Route firmware debug event to the diag channel Date: Wed, 26 Aug 2026 19:16:17 +0800 Message-ID: <20260826111617.1175698-1-chris.lu@mediatek.com> X-Mailer: git-send-email 2.45.2 Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain MediaTek controllers may emit a firmware debug event on the ACL channel using the reserved handle 0x0efd, which shows up in the ACL header as 0x2efd once the start fragment flag is included. Neither btmtk_usb_recv_acl() nor btmtksdio_recv_acl() recognizes it, so the packet is passed to the HCI core, which has no connection with that handle and complains: Bluetooth: hci0: ACL packet for unknown connection handle 3837 Handle it the same way as the existing firmware debug logging packets and forward it to the diagnostic channel instead. Signed-off-by: Chris Lu --- drivers/bluetooth/btmtk.c | 1 + drivers/bluetooth/btmtksdio.c | 1 + 2 files changed, 2 insertions(+) diff --git a/drivers/bluetooth/btmtk.c b/drivers/bluetooth/btmtk.c index 73ba4a029e9c..8563ab06a99f 100644 --- a/drivers/bluetooth/btmtk.c +++ b/drivers/bluetooth/btmtk.c @@ -1006,6 +1006,7 @@ int btmtk_usb_recv_acl(struct hci_dev *hdev, struct sk_buff *skb) fallthrough; case 0x05ff: /* Firmware debug logging 1 */ case 0x05fe: /* Firmware debug logging 2 */ + case 0x2efd: /* Firmware debug event */ return hci_recv_diag(hdev, skb); } diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c index b7f0be7fc42a..cba52724f867 100644 --- a/drivers/bluetooth/btmtksdio.c +++ b/drivers/bluetooth/btmtksdio.c @@ -460,6 +460,7 @@ static int btmtksdio_recv_acl(struct hci_dev *hdev, struct sk_buff *skb) fallthrough; case 0x05ff: case 0x05fe: + case 0x2efd: /* Firmware debug event */ /* Firmware debug logging */ return hci_recv_diag(hdev, skb); } -- 2.45.2