From mboxrd@z Thu Jan 1 00:00:00 1970 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=-6.8 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS autolearn=no 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 00922C433DF for ; Thu, 13 Aug 2020 10:58:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CCBED20771 for ; Thu, 13 Aug 2020 10:58:09 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="RQYb0J+R" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726621AbgHMK6I (ORCPT ); Thu, 13 Aug 2020 06:58:08 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:19880 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726567AbgHMK6G (ORCPT ); Thu, 13 Aug 2020 06:58:06 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1597316286; h=Content-Type: MIME-Version: Message-ID: In-Reply-To: Date: References: Subject: Cc: To: From: Sender; bh=lFkj72GeE2bw+45X+kHHD0BOzdXRWeQBgIzNSShoJpM=; b=RQYb0J+RHsypr28lBYEUI3a7ViSKVqqLQFIbmF4VS91wbNUOxiYP3oqbhrMGMjzd/hZb8lEN d3NKgFDTdbfryZHbxoTXRy30n+5chRC6Ha8qPNxo+7ZQicJdHy1H5bS85bspZgEjjTYg6fQF zG/F7+4/4j9BWJAkBuHVGF1qGrg= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI3YTAwOSIsICJsaW51eC13aXJlbGVzc0B2Z2VyLmtlcm5lbC5vcmciLCAiYmU5ZTRhIl0= Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n04.prod.us-west-2.postgun.com with SMTP id 5f351cae03528d40248bc852 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Thu, 13 Aug 2020 10:57:50 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id A4277C433CA; Thu, 13 Aug 2020 10:57:49 +0000 (UTC) Received: from x230.qca.qualcomm.com (88-114-240-156.elisa-laajakaista.fi [88.114.240.156]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: kvalo) by smtp.codeaurora.org (Postfix) with ESMTPSA id 0F1E1C433C6; Thu, 13 Aug 2020 10:57:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 0F1E1C433C6 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=kvalo@codeaurora.org From: Kalle Valo To: Wright Feng Cc: linux-wireless@vger.kernel.org, brcm80211-dev-list@broadcom.com, brcm80211-dev-list@cypress.com, Arend van Spriel , Franky Lin , Hante Meuleman , chi-hsien.lin@cypress.com, Dmitry Osipenko Subject: Re: [PATCH] brcmfmac: reserve tx credit only when txctl is ready to send References: <20200813070017.89023-1-wright.feng@cypress.com> Date: Thu, 13 Aug 2020 13:57:44 +0300 In-Reply-To: <20200813070017.89023-1-wright.feng@cypress.com> (Wright Feng's message of "Thu, 13 Aug 2020 02:00:16 -0500") Message-ID: <87o8nevmmv.fsf@codeaurora.org> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Wright Feng writes: > The 4329 throughput drops from 40.2 Mbits/sec to 190 Kbits/sec in 2G > 11n mode because the commit b41c232d33666 ("brcmfmac: reserve 2 credits > for host tx control path"). To fix the issue, host driver only reserves > tx control credit when there is a txctl frame is pending to send. And > we also check available credit by using "not equal to 0" instead of > "greater than 0" because tx_max and tx_seq are circled positive numbers. > > Reported-by: Dmitry Osipenko > Fixes: b41c232d33666 ("brcmfmac: reserve 2 credits for host tx control > path") Fixes tag should be in one line, but I can fix it. > Signed-off-by: Wright Feng > Tested-by: Dmitry Osipenko And I'll queue this to v5.9. -- https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches