From patchwork Mon Jan 17 05:39:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Puma Hsu X-Patchwork-Id: 12714777 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 0F278C433F5 for ; Mon, 17 Jan 2022 05:40:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232840AbiAQFkJ (ORCPT ); Mon, 17 Jan 2022 00:40:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58110 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229986AbiAQFkI (ORCPT ); Mon, 17 Jan 2022 00:40:08 -0500 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 34EC2C061574 for ; Sun, 16 Jan 2022 21:40:08 -0800 (PST) Received: by mail-yb1-xb4a.google.com with SMTP id p127-20020a254285000000b0061222917b37so4111122yba.9 for ; Sun, 16 Jan 2022 21:40:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:message-id:mime-version:subject:from:to:cc; bh=kHrC0ZNtdAjmUJmpQtal/sFEceDq2usB7n488HtzJyU=; b=FoZScfXDQtIvSINxhwpNPqr2wc4+9o3tgZ/tO5pDjpWmrSWp42+eeYjppN+aSiNv9U kCNvac2PojYKLVlQ1j1aS/lUX8C5R9b2T0ah9mMXlRWXPGSdSO4TNa8FTmHcf6L4cVVN XZQ5/rzLIfYHk0Y8I8peVe9yjflucydPmjMa5wZefbcbq+IBZAEShCoMTlgXiLhTKBzH UtNREaEyhOIYCzRBZOdrrMM/6qB9uUNxYik69csUd01f6LYUmYTbooF6CUm/gQ/h/fj2 9jEs5Oox3RLtIjxK1/Pbn3Ax3MROwHid70HBjtaWPwgHuSZstOGrLjdFdhzXuHezne7b fehw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=kHrC0ZNtdAjmUJmpQtal/sFEceDq2usB7n488HtzJyU=; b=Cdv/cpvRKmcLMPRL7rs5XpD3XpdtBqZDrrqHubmSn6wlbuuJt0o0/XmsJy7E/mXRmZ 4d1iUKSA9uWGd2XaceM/A5LvnAqAnSW27WeS07w2lLQSpftvySt3sPoW+YMyUjSB1Z5k GWpsSXUjXRSY9sID6eXB71Ea7WF8LRlDg98NEjJdfkPPF/U3CkNtkd1y0kr4bwaWTebZ kBATXXiwuBBwRrQEZso2cRZB2rzwR1jftJXO9gftUawf+vd9z4wA6zkAbqtcY6O2X/s7 S4r0QDq4aPBVPPmrrs3FOA9jS/ClYHnuCT4Aua9N7CxMf7jaSS2QmJyH+59TcCYN0xSs Yw1w== X-Gm-Message-State: AOAM533S61Noe7c8LxkwV9RF0vZFgiOUy5Xe1tATTMJFbnQKpVtBeD1B Q+Ds7+9xlZaow+3jEKAptRA3mxfmUktl X-Google-Smtp-Source: ABdhPJzBnaI/zy/gt36IQozw7qOVqf4D5D6Z89ZgclkVag0otV1hW+5BOVZjfLcikEKcWEg+uSXZlzRQtYzU X-Received: from pumahsu.ntc.corp.google.com ([2401:fa00:fc:202:e7:3de8:f33d:ca1c]) (user=pumahsu job=sendgmr) by 2002:a25:6d06:: with SMTP id i6mr24525004ybc.216.1642398007387; Sun, 16 Jan 2022 21:40:07 -0800 (PST) Date: Mon, 17 Jan 2022 13:39:18 +0800 Message-Id: <20220117053918.671399-1-pumahsu@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.34.1.703.g22d0c6ccf7-goog Subject: [PATCH v4] xhci: re-initialize the HC during resume if HCE was set From: Puma Hsu To: mathias.nyman@intel.com, gregkh@linuxfoundation.org Cc: s.shtylyov@omp.ru, albertccwang@google.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Puma Hsu , stable@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org When HCE(Host Controller Error) is set, it means an internal error condition has been detected. Software needs to re-initialize the HC, so add this check in xhci resume. Cc: stable@vger.kernel.org Signed-off-by: Puma Hsu --- v2: Follow Sergey Shtylyov 's comment. v3: Add stable@vger.kernel.org for stable release. v4: Refine the commit message. drivers/usb/host/xhci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index dc357cabb265..ab440ce8420f 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1146,8 +1146,8 @@ int xhci_resume(struct xhci_hcd *xhci, bool hibernated) temp = readl(&xhci->op_regs->status); } - /* If restore operation fails, re-initialize the HC during resume */ - if ((temp & STS_SRE) || hibernated) { + /* If restore operation fails or HC error is detected, re-initialize the HC during resume */ + if ((temp & (STS_SRE | STS_HCE)) || hibernated) { if ((xhci->quirks & XHCI_COMP_MODE_QUIRK) && !(xhci_all_ports_seen_u0(xhci))) {