linux-kernel - [PATCH 5.4 16/36] arm64: tegra: Disable the ACONNECT for Jetson TX2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20201214172544.105222494@linuxfoundation.org>
Date:   Mon, 14 Dec 2020 18:28:00 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jon Hunter <jonathanh@...dia.com>,
        Thierry Reding <treding@...dia.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 16/36] arm64: tegra: Disable the ACONNECT for Jetson TX2

From: Jon Hunter <jonathanh@...dia.com>

[ Upstream commit fb319496935b7475a863a00c76895e8bb3216704 ]

Commit ff4c371d2bc0 ("arm64: defconfig: Build ADMA and ACONNECT driver")
enable the Tegra ADMA and ACONNECT drivers and this is causing resume
from system suspend to fail on Jetson TX2. Resume is failing because the
ACONNECT driver is being resumed before the BPMP driver, and the ACONNECT
driver is attempting to power on a power-domain that is provided by the
BPMP. While a proper fix for the resume sequencing problem is identified,
disable the ACONNECT for Jetson TX2 temporarily to avoid breaking system
suspend.

Please note that ACONNECT driver is used by the Audio Processing Engine
(APE) on Tegra, but because there is no mainline support for APE on
Jetson TX2 currently, disabling the ACONNECT does not disable any useful
feature at the moment.

Signed-off-by: Jon Hunter <jonathanh@...dia.com>
Signed-off-by: Thierry Reding <treding@...dia.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts b/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
index bdace01561bab..9df4782c90f35 100644
--- a/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
+++ b/arch/arm64/boot/dts/nvidia/tegra186-p2771-0000.dts
@@ -10,18 +10,6 @@
 	model = "NVIDIA Jetson TX2 Developer Kit";
 	compatible = "nvidia,p2771-0000", "nvidia,tegra186";

-	aconnect {
-		status = "okay";
-
-		dma-controller@...0000 {
-			status = "okay";
-		};
-
-		interrupt-controller@...0000 {
-			status = "okay";
-		};
-	};
-
 	i2c@...0000 {
 		power-monitor@42 {
 			compatible = "ti,ina3221";
-- 
2.27.0