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[209.132.180.67]) by mx.google.com with ESMTP id l6si5143468otk.134.2020.01.26.02.35.00; Sun, 26 Jan 2020 02:35:11 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-wireless-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@mg.codeaurora.org header.s=smtp header.b="nupGyn3/"; spf=pass (google.com: best guess record for domain of linux-wireless-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-wireless-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729145AbgAZKe4 (ORCPT + 99 others); Sun, 26 Jan 2020 05:34:56 -0500 Received: from mail25.static.mailgun.info ([104.130.122.25]:23995 "EHLO mail25.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726571AbgAZKe4 (ORCPT ); Sun, 26 Jan 2020 05:34:56 -0500 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1580034896; h=Date: Message-Id: Cc: To: References: In-Reply-To: From: Subject: Content-Transfer-Encoding: MIME-Version: Content-Type: Sender; bh=pihjqQSpN0i26N9eBw/aDLtknwEWAo/7uSI8Y1MDipk=; b=nupGyn3/NIYDSSpMCjex1IyrNIerv1nOonxfHOl6QUsQUDtbCjdXHjD+ssTI2qWTBuzMIpKI kBRasSuBX6Ae5cPKncluM7eN56/Hu1vBhImlG3BHqsz97aPzltypo58Oyr/nxrtShu07CTE9 VHpvnXQ0GsaxzQ89EKq4KGHQBpc= X-Mailgun-Sending-Ip: 104.130.122.25 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 mxa.mailgun.org with ESMTP id 5e2d6b4d.7fe5371cef10-smtp-out-n03; Sun, 26 Jan 2020 10:34:53 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id DF7CAC433A2; Sun, 26 Jan 2020 10:34:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=0.5 required=2.0 tests=ALL_TRUSTED,MISSING_DATE, MISSING_MID,SPF_NONE autolearn=no autolearn_force=no version=3.4.0 Received: from potku.adurom.net (88-114-240-156.elisa-laajakaista.fi [88.114.240.156]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: kvalo) by smtp.codeaurora.org (Postfix) with ESMTPSA id 6EEFAC433CB; Sun, 26 Jan 2020 10:34:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 6EEFAC433CB 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 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [PATCH, v4] Revert "ath10k: fix DMA related firmware crashes on multiple devices" From: Kalle Valo In-Reply-To: <1578976521-6104-1-git-send-email-zhichen@codeaurora.org> References: <1578976521-6104-1-git-send-email-zhichen@codeaurora.org> To: Zhi Chen Cc: ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, Zhi Chen User-Agent: pwcli/0.0.0-git (https://github.com/kvalo/pwcli/) Python/2.7.12 Message-Id: <20200126103452.DF7CAC433A2@smtp.codeaurora.org> Date: Sun, 26 Jan 2020 10:34:52 +0000 (UTC) Sender: linux-wireless-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-wireless@vger.kernel.org Zhi Chen wrote: > This reverts commit 76d164f582150fd0259ec0fcbc485470bcd8033e. > PCIe hung issue was observed on multiple platforms. The issue was reproduced > when DUT was configured as AP and associated with 50+ STAs. > > For QCA9984/QCA9888, the DMA_BURST_SIZE register controls the AXI burst size > of the RD/WR access to the HOST MEM. > 0 - No split , RAW read/write transfer size from MAC is put out on bus > as burst length > 1 - Split at 256 byte boundary > 2,3 - Reserved > > With PCIe protocol analyzer, we can see DMA Read crossing 4KB boundary when > issue happened. It broke PCIe spec and caused PCIe stuck. So revert > the default value from 0 to 1. > > Tested: IPQ8064 + QCA9984 with firmware 10.4-3.10-00047 > QCS404 + QCA9984 with firmware 10.4-3.9.0.2--00044 > Synaptics AS370 + QCA9888 with firmware 10.4-3.9.0.2--00040 > > Signed-off-by: Zhi Chen > Signed-off-by: Kalle Valo Patch applied to ath-next branch of ath.git, thanks. a1769bb68a85 Revert "ath10k: fix DMA related firmware crashes on multiple devices" -- https://patchwork.kernel.org/patch/11331293/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches