From patchwork Thu May 20 09:24:13 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 445241 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_NONE, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1048CC433ED for ; Thu, 20 May 2021 11:25:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E0DE2613B4 for ; Thu, 20 May 2021 11:25:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240672AbhETL0i (ORCPT ); Thu, 20 May 2021 07:26:38 -0400 Received: from mail.kernel.org ([198.145.29.99]:44408 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241672AbhETLZS (ORCPT ); Thu, 20 May 2021 07:25:18 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 986066196E; Thu, 20 May 2021 10:12:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621505573; bh=Dp6o75Ff8MqXtSUbmpR2f9jwiirqVvPfWwHj8OA9CP0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RyALVIi3q2kCQxlUO8Zeo7H1/T3jssz4QdkK+NO59IG16nZXmwNqRV2zRIpV7/jzj 7jl9jyTNRXEeZd23/JbeNBA5U3uS13kEOL3khkR1ylAnFY8hnsebanXT5pGKIULIKM SW/nHOOiSqIWNSaecj4Iy96lxPdeh7KPxIxQEWTQ= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christophe JAILLET , Mathias Nyman , Nobuhiro Iwamatsu Subject: [PATCH 4.4 189/190] xhci: Do not use GFP_KERNEL in (potentially) atomic context Date: Thu, 20 May 2021 11:24:13 +0200 Message-Id: <20210520092108.415487606@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092102.149300807@linuxfoundation.org> References: <20210520092102.149300807@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christophe JAILLET commit dda32c00c9a0fa103b5d54ef72c477b7aa993679 upstream. 'xhci_urb_enqueue()' is passed a 'mem_flags' argument, because "URBs may be submitted in interrupt context" (see comment related to 'usb_submit_urb()' in 'drivers/usb/core/urb.c') So this flag should be used in all the calling chain. Up to now, 'xhci_check_maxpacket()' which is only called from 'xhci_urb_enqueue()', uses GFP_KERNEL. Be safe and pass the mem_flags to this function as well. Fixes: ddba5cd0aeff ("xhci: Use command structures when queuing commands on the command ring") Cc: Signed-off-by: Christophe JAILLET Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20210512080816.866037-4-mathias.nyman@linux.intel.com [iwamatsu: Adjust context] Signed-off-by: Nobuhiro Iwamatsu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -1302,7 +1302,7 @@ static int xhci_configure_endpoint(struc * we need to issue an evaluate context command and wait on it. */ static int xhci_check_maxpacket(struct xhci_hcd *xhci, unsigned int slot_id, - unsigned int ep_index, struct urb *urb) + unsigned int ep_index, struct urb *urb, gfp_t mem_flags) { struct xhci_container_ctx *out_ctx; struct xhci_input_control_ctx *ctrl_ctx; @@ -1333,7 +1333,7 @@ static int xhci_check_maxpacket(struct x * changes max packet sizes. */ - command = xhci_alloc_command(xhci, false, true, GFP_KERNEL); + command = xhci_alloc_command(xhci, false, true, mem_flags); if (!command) return -ENOMEM; @@ -1440,7 +1440,7 @@ int xhci_urb_enqueue(struct usb_hcd *hcd */ if (urb->dev->speed == USB_SPEED_FULL) { ret = xhci_check_maxpacket(xhci, slot_id, - ep_index, urb); + ep_index, urb, mem_flags); if (ret < 0) { xhci_urb_free_priv(urb_priv); urb->hcpriv = NULL;