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: Chunfeng Yun X-Patchwork-Id: 12936870 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E489FC00140 for ; Fri, 5 Aug 2022 06:45:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=MfImUhwsyx61JR5BqmeI3cE0Y6Pjn+FNK2ZSPMfdz84=; b=eS/B7RCVUUQC+4 cAxkFmnzJc8pUS5QNZTWL47rGcLlWtro9A8VJJ2vOowTWIvjp/hrSALqMK9GVpLwJXXqtfgm7K0vb mxCb8FtFEgAQdy1+KNqz4bU4k3SOupR+/f0D6y+PSye4FUprugAU73hMeTGKJqOE8Z9w9xjTN+FSA bkxrvlLUo94rRBfxAXT7vR49heaU2ihTU5jjOz3bg6DR5a+ZMQMldRdauMVX+aHDlPzbt2OOorUlz ZahfQHNj9I8xfxhyZMxnaW9OH4+Ftm0r236DJqECsLrGU/LzsLXE8F2xm9rmgvJjtDaGEZJvOtKue tW41r50hoo+5ypxKyt2w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oJr4M-00CTzg-6C; Fri, 05 Aug 2022 06:44:26 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oJr4A-00CTtw-M4; Fri, 05 Aug 2022 06:44:15 +0000 X-UUID: 032389eb253d4dd0aafeafb94f287301-20220804 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.8,REQID:48d0ba74-880c-45f1-8907-3459955ae519,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:5996da9b-da39-4e3b-a854-56c7d2111b46,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: 032389eb253d4dd0aafeafb94f287301-20220804 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 23949231; Thu, 04 Aug 2022 23:44:09 -0700 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 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220804_234414_741175_2CFB1FBC X-CRM114-Status: GOOD ( 13.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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; }