From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-by2lp0239.outbound.protection.outlook.com ([207.46.163.239]:7697 "EHLO na01-by2-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753335AbaFYGMs (ORCPT ); Wed, 25 Jun 2014 02:12:48 -0400 Date: Wed, 25 Jun 2014 14:12:40 +0800 From: Shawn Guo To: Lucas Stach CC: Richard Zhu , , Bjorn Helgaas , , Subject: Re: The imx6q suspend/resume is broken on 3.16-rc due to PCIe Message-ID: <20140625061238.GA3242@dragon> References: <20140624153559.GA5741@dragon> <1403626435.4230.17.camel@weser.hi.pengutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" In-Reply-To: <1403626435.4230.17.camel@weser.hi.pengutronix.de> Sender: linux-pci-owner@vger.kernel.org List-ID: On Tue, Jun 24, 2014 at 06:13:55PM +0200, Lucas Stach wrote: > Hi Shawn, > > Am Dienstag, den 24.06.2014, 23:36 +0800 schrieb Shawn Guo: > > Hi Lucas, > > > > I found that imx6q suspend/resume is broken on 3.16-rc, and it works > > just fine if PCIe support is built out. However the issue was not > > exposed on 3.15, so I suspect the PCIe driver change merged in 3.16 > > is part of the cause. > > > I don't yet see why any of the changes to the designware/imx6 host > driver would cause such failures. > > Which board are you doing your testing on? What devices are connected to > the PCIe bus? In what way does it break system resume, complete hang? It's on imx6q-sabresd without any PCIe device connected. Right, it's a complete hang after enabling non-boot CPUs. ... Enabling non-boot CPUs ... CPU1: Booted secondary processor CPU1 is up CPU2: Booted secondary processor CPU2 is up CPU3: Booted secondary processor CPU3 is up <*** hang here ***> Shawn