From nobody Mon Feb 9 05:29:36 2026 Received: from mailgw.kylinos.cn (mailgw.kylinos.cn [124.126.103.232]) (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 8547F23FC5A; Wed, 7 Jan 2026 02:48:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=124.126.103.232 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767754118; cv=none; b=jNV8OogQM/+ZEWzz/8wVY4c6kU11Ab0Vg5ASjKOkGzUWmKIuVeOJlIDK7PE/ARfPqqc+jF5DTnmFMbbQqs6qMQxokJ6U8ZvdJuXq3aZ9+gM1iPuQ3tzkH94RjKwceZDWpBMS8LFD7z/oHorKed38xBUf2spcmHkb2OEWOuZp3Rw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767754118; c=relaxed/simple; bh=kLdbw7Qo0qzMh5qaMgE2a/D4q8wiV4ZTu9l2wRryBdw=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=lIA0NlqoxjSRDpnyM78AkmXvawyQ3JLSvrR2xUQvLR3UhtJ8OO+il7X7tw8tkNzI69b/VOKvMbsXvck37kzaOY6xvuLDmw8zvpb3llXZrbpaUTv7TXRW1RbZs8W0C+lKYC4fFFaunVQGDSKNqIjDpswyMWDwbhQINyveOTS/bpc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn; spf=pass smtp.mailfrom=kylinos.cn; arc=none smtp.client-ip=124.126.103.232 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kylinos.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kylinos.cn X-UUID: 581b20f2eb7311f0a38c85956e01ac42-20260107 X-CID-CACHE: Type:Local,Time:202601071028+08,HitQuantity:2 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.3.6,REQID:38bb8a90-d56b-49ef-8bbd-f24b20784e49,IP:0,UR L:0,TC:0,Content:0,EDM:-25,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-25 X-CID-META: VersionHash:a9d874c,CLOUDID:876cb7553d37f6d7eed15638b3e44cb5,BulkI D:nil,BulkQuantity:0,Recheck:0,SF:102|850|898,TC:nil,Content:0|15|50,EDM:2 ,IP:nil,URL:0,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: 2,SSN|SDN X-CID-BAS: 2,SSN|SDN,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-CID-RHF: D41D8CD98F00B204E9800998ECF8427E X-UUID: 581b20f2eb7311f0a38c85956e01ac42-20260107 X-User: lilinmao@kylinos.cn Received: from localhost.localdomain [(10.44.16.150)] by mailgw.kylinos.cn (envelope-from ) (Generic MTA with TLSv1.3 TLS_AES_256_GCM_SHA384 256/256) with ESMTP id 1352299388; Wed, 07 Jan 2026 10:48:28 +0800 From: Linmao Li To: linux-bluetooth@vger.kernel.org Cc: marcel@holtmann.org, luiz.dentz@gmail.com, linux-kernel@vger.kernel.org, Linmao Li Subject: [PATCH] Bluetooth: btusb: Reject autosuspend if HCI inquiry or LE scan is active Date: Wed, 7 Jan 2026 10:48:20 +0800 Message-Id: <20260107024820.1722270-1-lilinmao@kylinos.cn> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" If USB autosuspend occurs while BR/EDR inquiry or LE scan is active, the ongoing HCI operation may not complete successfully. On some devices, this can leave discovery.state stuck in DISCOVERY_FINDING. Signed-off-by: Linmao Li --- drivers/bluetooth/btusb.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c index ded09e94d296..885c3d8c0a10 100644 --- a/drivers/bluetooth/btusb.c +++ b/drivers/bluetooth/btusb.c @@ -4469,10 +4469,13 @@ static int btusb_suspend(struct usb_interface *intf= , pm_message_t message) =20 BT_DBG("intf %p", intf); =20 - /* Don't auto-suspend if there are connections; external suspend calls - * shall never fail. + /* Don't auto-suspend if there are connections or HCI operations in + * progress; external suspend calls shall never fail. */ - if (PMSG_IS_AUTO(message) && hci_conn_count(data->hdev)) + if (PMSG_IS_AUTO(message) && + (hci_conn_count(data->hdev) || + test_bit(HCI_INQUIRY, &data->hdev->flags) || + hci_dev_test_flag(data->hdev, HCI_LE_SCAN))) return -EBUSY; =20 if (data->suspend_count++) --=20 2.25.1