From mboxrd@z Thu Jan 1 00:00:00 1970 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=-10.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 CACABC433E0 for ; Thu, 30 Jul 2020 08:09:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9EDF92083B for ; Thu, 30 Jul 2020 08:09:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596096552; bh=7rd/OGluXtLn4fNF/C5/d8dC2FG2dp25gWQxcM9U4/E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=diWWvGOzXPUUDHaeQ1rX9QlKaI2fxGxpKo13zjlb1l0GNeZFuwMP1pDv/Vx3DrfgE MOzZcFyTH6H57YrCxFMxPlETk/cheSbLfZWJqSCUhYrBMBZ++OYOUEv9MO5168hXiI iWh0YejL9KoIJGL42BpUief7hnMc1flfDVY2HwrI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728904AbgG3IJL (ORCPT ); Thu, 30 Jul 2020 04:09:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:47530 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729272AbgG3IJG (ORCPT ); Thu, 30 Jul 2020 04:09:06 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 01D702074B; Thu, 30 Jul 2020 08:09:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1596096545; bh=7rd/OGluXtLn4fNF/C5/d8dC2FG2dp25gWQxcM9U4/E=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QFOc2TIJWpdhAJlE5sPFLk8Tq+AtIcLuBRsiY7A/X6B/F8CuheCuOXNFAqAhhjjku EONPrpV1Z6PIKdL/6ElttHJpFV7puROrhvv8wAvtatOkIVywBXEqKGgj9MeBC7ivev MsXZOCJzm/uU6SDLDmhHVSczkw2OGYQdpFUPre/4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Chunfeng Yun Subject: [PATCH 4.9 29/61] usb: xhci-mtk: fix the failure of bandwidth allocation Date: Thu, 30 Jul 2020 10:04:47 +0200 Message-Id: <20200730074422.248871374@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200730074420.811058810@linuxfoundation.org> References: <20200730074420.811058810@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Chunfeng Yun commit 5ce1a24dd98c00a57a8fa13660648abf7e08e3ef upstream. The wMaxPacketSize field of endpoint descriptor may be zero as default value in alternate interface, and they are not actually selected when start stream, so skip them when try to allocate bandwidth. Cc: stable Fixes: 0cbd4b34cda9 ("xhci: mediatek: support MTK xHCI host controller") Signed-off-by: Chunfeng Yun Link: https://lore.kernel.org/r/1594360672-2076-1-git-send-email-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-mtk-sch.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -284,6 +284,10 @@ static bool need_bw_sch(struct usb_host_ if (is_fs_or_ls(speed) && !has_tt) return false; + /* skip endpoint with zero maxpkt */ + if (usb_endpoint_maxp(&ep->desc) == 0) + return false; + return true; }