From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mika Westerberg Subject: Re: Diagnosing ACPI trouble related to pinctr_cherryview on 4.4.x Date: Tue, 22 Mar 2016 17:51:59 +0200 Message-ID: <20160322155159.GC2099@lahna.fi.intel.com> References: <20160322152218.GA2099@lahna.fi.intel.com> <20160322154950.GB2099@lahna.fi.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mga04.intel.com ([192.55.52.120]:64840 "EHLO mga04.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752213AbcCVPwF (ORCPT ); Tue, 22 Mar 2016 11:52:05 -0400 Content-Disposition: inline In-Reply-To: <20160322154950.GB2099@lahna.fi.intel.com> Sender: linux-gpio-owner@vger.kernel.org List-Id: linux-gpio@vger.kernel.org To: Martin Langhoff Cc: Heikki Krogerus , Linus Walleij , linux-gpio@vger.kernel.org, Andy Shevchenko On Tue, Mar 22, 2016 at 05:49:50PM +0200, Mika Westerberg wrote: > On Tue, Mar 22, 2016 at 11:41:38AM -0400, Martin Langhoff wrote: > > On Tue, Mar 22, 2016 at 11:22 AM, Mika Westerberg > > wrote: > > > I think this is a known issue. > > > > > > Please disable dw_dmac from your .config (or blacklist the module): > > > > > > CONFIG_DW_DMAC_CORE=n > > > CONFIG_DW_DMAC=n > > > > > > You can also enable pinctrl-cherryview.c. > > > > Thanks for the suggestion. Did not complete boot however, got a > > slightly different call trace, but still no go. As that trace crossed > > _prepare_cpus I tried adding nosmp, but we still crash in > > acpi_init->acpi_scan_init->acpi_bus_scan->acpi_bus_attach > > > > Any other suggestion? lspci normal and verbose follow... > > Do you have anything special on the kernel command line? You should not > do anything else than disable DW_DMAC. That is enough to prevent the > DMA hang if that's the issue. > > Are you able to get dmesg of the crash? Also I can see that the LPSS devices are in PCI mode for some reason. BTW, what laptop this is?