From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754716AbcKAXWc (ORCPT ); Tue, 1 Nov 2016 19:22:32 -0400 Received: from gloria.sntech.de ([95.129.55.99]:36312 "EHLO gloria.sntech.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751957AbcKAXWb (ORCPT ); Tue, 1 Nov 2016 19:22:31 -0400 From: Heiko Stuebner To: Caesar Wang Cc: khilman@linaro.org, zhangqing@rock-chips.com, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, tfiga@chromium.org Subject: Re: [PATCH v2] soc: rockchip: avoid infinite loop for power domain Date: Wed, 02 Nov 2016 00:22:13 +0100 Message-ID: <1994521.aqSE2RsRj4@phil> User-Agent: KMail/5.2.3 (Linux/4.7.0-1-amd64; KDE/5.26.0; x86_64; ; ) In-Reply-To: <1476296168-29154-1-git-send-email-wxt@rock-chips.com> References: <1476296168-29154-1-git-send-email-wxt@rock-chips.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Am Donnerstag, 13. Oktober 2016, 02:16:08 CET schrieb Caesar Wang: > In some cases, we have met the infinite loop in > rockchip_pmu_set_idle_request() or rockchip_do_pmu_set_power_domain(). > > As the crosbug.com/p/57351 reported, the boot hangs right after this > [1.629163] bootconsole [uart8250] disabled > [1.639286] [drm:drm_core_init] Initialized drm 1.1.0 20060810 > [1.645926] [drm:drm_get_platform_dev] Initialized vgem 1.0.0 20120112.. > [1.654558] iommu: Adding device ff8f0000.vop to group 0 > [1.660569] iommu: Adding device ff900000.vop to group 1 > > > This patch adds the error message and timeout to avoid infinite loop if > it fails to get the ack. > > Signed-off-by: Caesar Wang applied to by drivers-branch for 4.10 Thanks Heiko