From patchwork Mon Feb 14 12:20:16 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pavan Kondeti X-Patchwork-Id: 12745496 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 EB494C433EF for ; Mon, 14 Feb 2022 12:20:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353078AbiBNMVG (ORCPT ); Mon, 14 Feb 2022 07:21:06 -0500 Received: from mxb-00190b01.gslb.pphosted.com ([23.128.96.19]:51790 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242410AbiBNMVF (ORCPT ); Mon, 14 Feb 2022 07:21:05 -0500 Received: from alexa-out.qualcomm.com (alexa-out.qualcomm.com [129.46.98.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 73C834926D; Mon, 14 Feb 2022 04:20:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1644841258; x=1676377258; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version; bh=MW9gwIUptsYLqIzS86VeUTXVM3BIYMlecniPn+jF7iU=; b=IhyHrgbNd+6q3h9SB71owo7p7xlks/JUpnQKi+xdAPaTia/wR3LrLoRU ViUq3eGTbaCS5xICTMz3DMsi85YFRQTktbVvaSGnXjWTB4VVsty+hn0Wh isQD0tZhmNVAD5e6KYHeaIIkqrpcdkfMboRiJHiZkxb2cZEiNqVu5Uy/v E=; Received: from ironmsg-lv-alpha.qualcomm.com ([10.47.202.13]) by alexa-out.qualcomm.com with ESMTP; 14 Feb 2022 04:20:57 -0800 X-QCInternal: smtphost Received: from nasanex01c.na.qualcomm.com ([10.47.97.222]) by ironmsg-lv-alpha.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Feb 2022 04:20:56 -0800 Received: from nalasex01a.na.qualcomm.com (10.47.209.196) by nasanex01c.na.qualcomm.com (10.47.97.222) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.15; Mon, 14 Feb 2022 04:20:56 -0800 Received: from quicinc.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.922.19; Mon, 14 Feb 2022 04:20:53 -0800 From: Pavankumar Kondeti To: Greg Kroah-Hartman , Mathias Nyman CC: , , , Jung Daehwan , Pavankumar Kondeti Subject: [PATCH v2] xhci: reduce xhci_handshake timeout in xhci_reset Date: Mon, 14 Feb 2022 17:50:16 +0530 Message-ID: <1644841216-1468-1-git-send-email-quic_pkondeti@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1644836663-29220-1-git-send-email-quic_pkondeti@quicinc.com> References: <1644836663-29220-1-git-send-email-quic_pkondeti@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: Daehwan Jung xhci_reset() is called with interrupts disabled. Waiting 10 seconds for controller reset and controller ready operations can be fatal to the system when controller is timed out. Reduce the timeout to 1 second and print a error message when the time out happens. Fixes: 22ceac191211 ("xhci: Increase reset timeout for Renesas 720201 host.") Signed-off-by: Daehwan Jung Signed-off-by: Pavankumar Kondeti --- v2: - Add error print statements in the code that change log refers to drivers/usb/host/xhci.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c index dc357ca..bb9ea3f 100644 --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -196,9 +196,11 @@ int xhci_reset(struct xhci_hcd *xhci) udelay(1000); ret = xhci_handshake(&xhci->op_regs->command, - CMD_RESET, 0, 10 * 1000 * 1000); - if (ret) + CMD_RESET, 0, 1 * 1000 * 1000); + if (ret) { + xhci_err(xhci, "Host controller reset timed out\n"); return ret; + } if (xhci->quirks & XHCI_ASMEDIA_MODIFY_FLOWCONTROL) usb_asmedia_modifyflowcontrol(to_pci_dev(xhci_to_hcd(xhci)->self.controller)); @@ -210,7 +212,11 @@ int xhci_reset(struct xhci_hcd *xhci) * than status until the "Controller Not Ready" flag is cleared. */ ret = xhci_handshake(&xhci->op_regs->status, - STS_CNR, 0, 10 * 1000 * 1000); + STS_CNR, 0, 1 * 1000 * 1000); + if (ret) { + xhci_err(xhci, "Host controller is not ready within timeout\n"); + return ret; + } xhci->usb2_rhub.bus_state.port_c_suspend = 0; xhci->usb2_rhub.bus_state.suspended_ports = 0;