From patchwork Fri Aug 19 08:05:56 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: 12948501 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 9234CC32771 for ; Fri, 19 Aug 2022 08:06:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347397AbiHSIGH (ORCPT ); Fri, 19 Aug 2022 04:06:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34710 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347393AbiHSIGG (ORCPT ); Fri, 19 Aug 2022 04:06:06 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4DAA6DC0BB; Fri, 19 Aug 2022 01:06:04 -0700 (PDT) X-UUID: d3be4a4a6cf04c87994507d79ab72624-20220819 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=ORM6sl5194E0I4ytj2g+FRhv8tYC54a1lBFdsDfzRCM=; b=cvj4ug/Q4mXC52uF5AGR9gu88RbQdW31S8B3/g7gCVvY1Ic0sajJUAbt/wmYEwBUS0Ujf4bLvqUn/aqkb1T4R35k0lDmbV7SU7ESFSSwyo3X4dZzbrrQiF8BWkmBy/Bx9E5kQnbj6qXOKoatVMd+nhrJyL5xfBu29VL3GCoZ6gw=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.10,REQID:6d52f663-d3c1-4c99-a505-abee529a0658,OB:0,L OB:0,IP:0,URL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_ Ham,ACTION:release,TS:0 X-CID-META: VersionHash:84eae18,CLOUDID:7935229d-da39-4e3b-a854-56c7d2111b46,C OID:IGNORED,Recheck:0,SF:nil,TC:nil,Content:0,EDM:-3,IP:nil,URL:11|1,File: nil,Bulk:nil,QS:nil,BEC:nil,COL:0 X-UUID: d3be4a4a6cf04c87994507d79ab72624-20220819 Received: from mtkexhb01.mediatek.inc [(172.21.101.102)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1552810941; Fri, 19 Aug 2022 16:05:59 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.792.15; Fri, 19 Aug 2022 16:05:58 +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, 19 Aug 2022 16:05:58 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman CC: Mathias Nyman , Chunfeng Yun , Matthias Brugger , , , , , "Eddie Hung" Subject: [PATCH RESEND v2 2/2] usb: xhci-mtk: fix bandwidth release issue Date: Fri, 19 Aug 2022 16:05:56 +0800 Message-ID: <20220819080556.32215-2-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220819080556.32215-1-chunfeng.yun@mediatek.com> References: <20220819080556.32215-1-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; }