From patchwork Thu May 6 06:31:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunfeng Yun X-Patchwork-Id: 12241687 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=-16.8 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 D8DB7C43462 for ; Thu, 6 May 2021 06:31:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B80B1613E3 for ; Thu, 6 May 2021 06:31:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232284AbhEFGcV (ORCPT ); Thu, 6 May 2021 02:32:21 -0400 Received: from mailgw01.mediatek.com ([210.61.82.183]:46594 "EHLO mailgw01.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S231528AbhEFGcU (ORCPT ); Thu, 6 May 2021 02:32:20 -0400 X-UUID: e5516a889067465196d01f0e5e005fdb-20210506 X-UUID: e5516a889067465196d01f0e5e005fdb-20210506 Received: from mtkmrs01.mediatek.inc [(172.21.131.159)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1703009739; Thu, 06 May 2021 14:31:19 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs06n1.mediatek.inc (172.21.101.129) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Thu, 6 May 2021 14:31:18 +0800 Received: from mtkslt301.mediatek.inc (10.21.14.114) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Thu, 6 May 2021 14:31:18 +0800 From: Chunfeng Yun To: Mathias Nyman CC: Chunfeng Yun , Greg Kroah-Hartman , Matthias Brugger , , , , , Ikjoon Jang , Eddie Hung Subject: [PATCH v2 3/3] usb: xhci-mtk: use first-fit for LS/FS Date: Thu, 6 May 2021 14:31:16 +0800 Message-ID: <20210506063116.41757-3-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210506063116.41757-1-chunfeng.yun@mediatek.com> References: <20210506063116.41757-1-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 --- v2: no changes --- 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; }