From patchwork Fri Apr 30 07:15:32 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12232747 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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,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 D213AC433ED for ; Fri, 30 Apr 2021 07:15:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0D4761424 for ; Fri, 30 Apr 2021 07:15:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230463AbhD3HQe (ORCPT ); Fri, 30 Apr 2021 03:16:34 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:57480 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S230445AbhD3HQd (ORCPT ); Fri, 30 Apr 2021 03:16:33 -0400 X-UUID: c7f5c9680bbf411a9c9d9c9c990f23ca-20210430 X-UUID: c7f5c9680bbf411a9c9d9c9c990f23ca-20210430 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 1160506484; Fri, 30 Apr 2021 15:15:41 +0800 Received: from mtkcas10.mediatek.inc (172.21.101.39) by mtkmbs06n1.mediatek.inc (172.21.101.129) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Fri, 30 Apr 2021 15:15:40 +0800 Received: from mtkslt301.mediatek.inc (10.21.14.114) by mtkcas10.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Fri, 30 Apr 2021 15:15:40 +0800 From: Chunfeng Yun To: Mathias Nyman CC: Chunfeng Yun , Greg Kroah-Hartman , Matthias Brugger , , , , , Ikjoon Jang , Eddie Hung Subject: [PATCH 3/3] usb: xhci-mtk: use first-fit for LS/FS Date: Fri, 30 Apr 2021 15:15:32 +0800 Message-ID: <20210430071532.51794-3-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210430071532.51794-1-chunfeng.yun@mediatek.com> References: <20210430071532.51794-1-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Use first-fit instead of best-fit for LS/FS devices under TT, we found that best-fit will consume more bandwidth for some cases. Signed-off-by: Chunfeng Yun --- drivers/usb/host/xhci-mtk-sch.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index 9fb75085e40f..c07411d9b16f 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -634,6 +634,11 @@ static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw, min_bw = worst_bw; min_index = offset; } + + /* use first-fit for LS/FS */ + if (sch_ep->sch_tt && min_index >= 0) + break; + if (min_bw == 0) break; }