From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:58682 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932541AbdKFJtP (ORCPT ); Mon, 6 Nov 2017 04:49:15 -0500 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Yan Markman , Igal Liberman , Nadav Haklai , Gregory CLEMENT Subject: [PATCH 4.4 08/40] ARM: dts: mvebu: pl310-cache disable double-linefill Date: Mon, 6 Nov 2017 10:44:43 +0100 Message-Id: <20171106094501.678754699@linuxfoundation.org> In-Reply-To: <20171106094501.346859822@linuxfoundation.org> References: <20171106094501.346859822@linuxfoundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org List-ID: 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Yan Markman commit cda80a82ac3e89309706c027ada6ab232be1d640 upstream. Under heavy system stress mvebu SoC using Cortex A9 sporadically encountered instability issues. The "double linefill" feature of L2 cache was identified as causing dependency between read and write which lead to the deadlock. Especially, it was the cause of deadlock seen under heavy PCIe traffic, as this dependency violates PCIE overtaking rule. Fixes: c8f5a878e554 ("ARM: mvebu: use DT properties to fine-tune the L2 configuration") Signed-off-by: Yan Markman Signed-off-by: Igal Liberman Signed-off-by: Nadav Haklai [gregory.clement@free-electrons.com: reformulate commit log, add Armada 375 and add Fixes tag] Signed-off-by: Gregory CLEMENT Signed-off-by: Greg Kroah-Hartman --- arch/arm/boot/dts/armada-375.dtsi | 4 ++-- arch/arm/boot/dts/armada-38x.dtsi | 4 ++-- arch/arm/boot/dts/armada-39x.dtsi | 4 ++-- 3 files changed, 6 insertions(+), 6 deletions(-) --- a/arch/arm/boot/dts/armada-375.dtsi +++ b/arch/arm/boot/dts/armada-375.dtsi @@ -176,9 +176,9 @@ reg = <0x8000 0x1000>; cache-unified; cache-level = <2>; - arm,double-linefill-incr = <1>; + arm,double-linefill-incr = <0>; arm,double-linefill-wrap = <0>; - arm,double-linefill = <1>; + arm,double-linefill = <0>; prefetch-data = <1>; }; --- a/arch/arm/boot/dts/armada-38x.dtsi +++ b/arch/arm/boot/dts/armada-38x.dtsi @@ -143,9 +143,9 @@ reg = <0x8000 0x1000>; cache-unified; cache-level = <2>; - arm,double-linefill-incr = <1>; + arm,double-linefill-incr = <0>; arm,double-linefill-wrap = <0>; - arm,double-linefill = <1>; + arm,double-linefill = <0>; prefetch-data = <1>; }; --- a/arch/arm/boot/dts/armada-39x.dtsi +++ b/arch/arm/boot/dts/armada-39x.dtsi @@ -104,9 +104,9 @@ reg = <0x8000 0x1000>; cache-unified; cache-level = <2>; - arm,double-linefill-incr = <1>; + arm,double-linefill-incr = <0>; arm,double-linefill-wrap = <0>; - arm,double-linefill = <1>; + arm,double-linefill = <0>; prefetch-data = <1>; };