From patchwork Fri Aug 5 06:03:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q2h1bmZlbmcgWXVuICjkupHmmKXls7Ap?= X-Patchwork-Id: 12936858 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 CBBFAC25B0C for ; Fri, 5 Aug 2022 06:03:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236103AbiHEGDm (ORCPT ); Fri, 5 Aug 2022 02:03:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60868 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230492AbiHEGDk (ORCPT ); Fri, 5 Aug 2022 02:03:40 -0400 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C237427B03; Thu, 4 Aug 2022 23:03:35 -0700 (PDT) X-UUID: 4da849926483465fb7441a17ac2c6379-20220805 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=JWSwfN8mSEnWeeZ9W2+DjYGYc2dFgD2DckE83Uv9OzA=; b=UTpyA/I8l54TNohu2UmYJSnOFd9mvIxFeKeHZcQmOLAC4PitjRXaSgvy7PpZ3ufnW2OnYQLTpanIqkYmyFGzpAwbfOFdC/Vci1BUS/iprguzQecwFpjIIoO6BmG7G/heUNtE+4Xp1kzcXsvCznRKtewI+znEkNEz2vaZpYKkOXI=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.8,REQID:9e95f804-d7aa-435c-ade9-d69c0d664c26,OB:0,LO B:0,IP:0,URL:5,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,RULE:Release_Ham,ACTI ON:release,TS:5 X-CID-META: VersionHash:0f94e32,CLOUDID:5da3ffad-9535-44a6-aa9b-7f62b79b6ff6,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil ,QS:nil,BEC:nil,COL:0 X-UUID: 4da849926483465fb7441a17ac2c6379-20220805 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1874094933; Fri, 05 Aug 2022 14:03:32 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs11n2.mediatek.inc (172.21.101.187) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Fri, 5 Aug 2022 14:03:31 +0800 Received: from localhost.localdomain (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.792.15 via Frontend Transport; Fri, 5 Aug 2022 14:03:30 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman CC: Chunfeng Yun , Mathias Nyman , Matthias Brugger , Ikjoon Jang , , , , , Eddie Hung Subject: [PATCH v2 2/2] usb: xhci-mtk: fix bandwidth release issue Date: Fri, 5 Aug 2022 14:03:28 +0800 Message-ID: <20220805060328.6189-2-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220805060328.6189-1-chunfeng.yun@mediatek.com> References: <20220805060328.6189-1-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org This happens when @udev->reset_resume is set to true, when usb resume, the flow as below: - hub_resume - usb_disable_interface - usb_disable_endpoint - usb_hcd_disable_endpoint - xhci_endpoint_disable // it set @ep->hcpriv to NULL Then when reset usb device, it will drop allocated endpoints, the flow as below: - usb_reset_and_verify_device - usb_hcd_alloc_bandwidth - xhci_mtk_drop_ep but @ep->hcpriv is already set to NULL, the bandwidth will be not released anymore. Due to the added endponts are stored in hash table, we can drop the check of @ep->hcpriv. Fixes: 4ce186665e7c ("usb: xhci-mtk: Do not use xhci's virt_dev in drop_endpoint") Signed-off-by: Chunfeng Yun --- v2: add comment --- drivers/usb/host/xhci-mtk-sch.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) } diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index a17bc584ee99..579899eb24c1 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -764,8 +764,8 @@ int xhci_mtk_drop_ep(struct usb_hcd *hcd, struct usb_device *udev, if (ret) return ret; - if (ep->hcpriv) - drop_ep_quirk(hcd, udev, ep); + /* needn't check @ep->hcpriv, xhci_endpoint_disable set it NULL */ + drop_ep_quirk(hcd, udev, ep); return 0;