From nobody Mon Feb 9 20:36:31 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3B138C7EE23 for ; Wed, 31 May 2023 22:27:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231267AbjEaW1n (ORCPT ); Wed, 31 May 2023 18:27:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230460AbjEaW1h (ORCPT ); Wed, 31 May 2023 18:27:37 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A6013121; Wed, 31 May 2023 15:27:35 -0700 (PDT) Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34VL0Ser014433; Wed, 31 May 2023 22:27:33 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=XYphsjpFQZ8qoW0HxD5fU0fwEGPiJV9LRkSsjbqnP9k=; b=R0psU+9YGwnkQkRzEIlFCJ6qEn+siZoo0qpfzhEMUtyED67e0mwZ1+icd68+5/VsR4Wq 0wGGR3l53CMY7xzGisB2bjygYLSZJIzSCfJ9Hh3ayY/EpQs1dLlc9tN9m6E54LeCLeTV oaTWH7Bl+QRHzRUDO857nMWaoKWWfce+i59lKVoDq2VuWdV9590UzCz50iKgEJ5MXvUP cOPP/4jozPF0kKjOdyMO5JbXRoCJXLcDBF0rgxnYXhxFedNnj+23HSGX/2jvqRCGUe9i 0/fu36fIbd4LOMrOUziWk+V+vTkSsyD5qOatHm6nSbFYudyOajIv/TPTw/1PnOYPridx OQ== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qxdr984wp-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 31 May 2023 22:27:33 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 34VMRWN0009728 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 31 May 2023 22:27:32 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Wed, 31 May 2023 15:27:31 -0700 From: Wesley Cheng To: , CC: , , Wesley Cheng Subject: [PATCH v3 1/2] usb: host: xhci: Do not re-initialize the XHCI HC if being removed Date: Wed, 31 May 2023 15:27:18 -0700 Message-ID: <20230531222719.14143-2-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230531222719.14143-1-quic_wcheng@quicinc.com> References: <20230531222719.14143-1-quic_wcheng@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: usDMe0dUJbpodKc9F1h83bCyQxWrYyqg X-Proofpoint-GUID: usDMe0dUJbpodKc9F1h83bCyQxWrYyqg X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-05-31_16,2023-05-31_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 clxscore=1015 impostorscore=0 mlxlogscore=803 suspectscore=0 malwarescore=0 phishscore=0 spamscore=0 lowpriorityscore=0 adultscore=0 priorityscore=1501 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305310189 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" During XHCI resume, if there was a host controller error detected the routine will attempt to re-initialize the XHCI HC, so that it can return back to an operational state. If the XHCI host controller is being removed, this sequence would be already handled within the XHCI halt path, leading to a duplicate set of reg ops/calls. In addition, since the XHCI bus is being removed, the overhead added in restarting the HCD is unnecessary. Check for the XHC state before setting the reinit_xhc parameter, which is responsible for triggering the restart. Signed-off-by: Wesley Cheng --- drivers/usb/host/xhci.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index b81313ffeb76..02a30b883bde 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1028,7 +1028,8 @@ int xhci_resume(struct xhci_hcd *xhci, pm_message_t m= sg) temp =3D readl(&xhci->op_regs->status); =20 /* re-initialize the HC on Restore Error, or Host Controller Error */ - if (temp & (STS_SRE | STS_HCE)) { + if ((temp & (STS_SRE | STS_HCE)) && + !(xhci->xhc_state & XHCI_STATE_REMOVING)) { reinit_xhc =3D true; if (!xhci->broken_suspend) xhci_warn(xhci, "xHC error in resume, USBSTS 0x%x, Reinit\n", temp); From nobody Mon Feb 9 20:36:31 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 762A1C7EE2D for ; Wed, 31 May 2023 22:27:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231254AbjEaW1l (ORCPT ); Wed, 31 May 2023 18:27:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44972 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230328AbjEaW1h (ORCPT ); Wed, 31 May 2023 18:27:37 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D78A39D; Wed, 31 May 2023 15:27:35 -0700 (PDT) Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34VLN6wq004816; Wed, 31 May 2023 22:27:33 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=qcppdkim1; bh=NioG84benTqgh2FgyViWa+iQXvzohB7fZ1EUffswWPM=; b=McYh0Sjoz0+GsKQH6BDdoLUf5vfPoN8Om0Q05GWebnIv5kLZYYfZ7jGI/1IOkGBcCA1O TESEo/IVVPZ3UDQUHRPfcigLyDMER78tHbh41vM2A8j7Y+f+vhKp4pfaZNdabTAVWYPX L2iTFNV/9RkI6DrCzG+HAH8OCeP0OvSox7o1ch7Ks9KLQipkBdBGq9tO7lFjkXQtMBuD MFCeC8t1zf9Fryc7oY5Vjg6JwQ9JqhJyzNQWAV33kirZDxPJwRhwh7xW9hd4Idbw6BRY 4Xv6g3MRVOIjLDyGKu7kECuHTz6nHr39gUGOloThyKftsZGHFfLttXt4MppXMFGe5xFu vQ== Received: from nalasppmta04.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qwx8qae02-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 31 May 2023 22:27:33 +0000 Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 34VMRWgn007459 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 31 May 2023 22:27:32 GMT Received: from hu-wcheng-lv.qualcomm.com (10.49.16.6) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Wed, 31 May 2023 15:27:32 -0700 From: Wesley Cheng To: , CC: , , Wesley Cheng Subject: [PATCH v3 2/2] usb: host: xhci-plat: Set XHCI_STATE_REMOVING before resuming XHCI HC Date: Wed, 31 May 2023 15:27:19 -0700 Message-ID: <20230531222719.14143-3-quic_wcheng@quicinc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230531222719.14143-1-quic_wcheng@quicinc.com> References: <20230531222719.14143-1-quic_wcheng@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: nA6Ysp8rqCH_H2jetBJTEgGnyi0wnrRj X-Proofpoint-GUID: nA6Ysp8rqCH_H2jetBJTEgGnyi0wnrRj X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-05-31_16,2023-05-31_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 phishscore=0 mlxlogscore=831 adultscore=0 impostorscore=0 malwarescore=0 clxscore=1015 spamscore=0 bulkscore=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305310189 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" There are situations during the xhci_resume() sequence, which allows for re-initializing of the XHCI HC. However, in case the HCD is being removed, these operations may not be needed. Set the removal state before issuing the runtime PM get on the XHCI device, so that the XHCI resume routine will know when to bypass the re-init logic. Signed-off-by: Wesley Cheng --- drivers/usb/host/xhci-plat.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index a666b21c21bb..a1e552d9da09 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -403,8 +403,8 @@ int xhci_plat_remove(struct platform_device *dev) struct clk *reg_clk =3D xhci->reg_clk; struct usb_hcd *shared_hcd =3D xhci->shared_hcd; =20 - pm_runtime_get_sync(&dev->dev); xhci->xhc_state |=3D XHCI_STATE_REMOVING; + pm_runtime_get_sync(&dev->dev); =20 if (shared_hcd) { usb_remove_hcd(shared_hcd);