From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965091AbbLROYq (ORCPT ); Fri, 18 Dec 2015 09:24:46 -0500 Received: from mga14.intel.com ([192.55.52.115]:50308 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752540AbbLROYo (ORCPT ); Fri, 18 Dec 2015 09:24:44 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,446,1444719600"; d="scan'208";a="864015974" Message-ID: <1450448699.30729.220.camel@linux.intel.com> Subject: Re: [PATCH 1/3] ata: sata_dwc_460ex: use "dmas" DT property to find dma channel From: Andy Shevchenko To: Julian Margetson , =?ISO-8859-1?Q?M=E5ns_Rullg=E5rd?= Cc: Tejun Heo , linux-ide@vger.kernel.org, linux-kernel@vger.kernel.org Date: Fri, 18 Dec 2015 16:24:59 +0200 In-Reply-To: <56740F9F.5020500@candw.ms> References: <1450221935-6034-1-git-send-email-mans@mansr.com> <1450364395.30729.136.camel@linux.intel.com> <1450367702.30729.146.camel@linux.intel.com> <1450371184.30729.175.camel@linux.intel.com> <5672F77F.4010306@candw.ms> <567302E8.5050303@candw.ms> <5673061A.4070700@candw.ms> <56732C04.9040100@candw.ms> <5673F277.2050607@candw.ms> <5673FD36.4050502@candw.ms> <56740F9F.5020500@candw.ms> Organization: Intel Finland Oy Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.18.2-1 Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2015-12-18 at 09:52 -0400, Julian Margetson wrote: > On 12/18/2015 8:45 AM, Måns Rullgård wrote: > > Julian Margetson writes: > > > > > [    4.784199] sata-dwc 4bffd1000.sata: id 0, controller > > > > > version 1.82 > > > > > [    4.791186] scsi host0: sata-dwc > > > > > [    4.794830] ata1: SATA max UDMA/133 irq 36 > > > > > [    4.799463] sata_sil 0001:00:04.0: Applying R_ERR on DMA > > > > > activate FIS errata fix > > > > > [    4.807959] scsi host1: sata_sil > > > > > [    4.811662] scsi host2: sata_sil > > > > > [    4.815242] ata2: SATA max UDMA/100 mmio m512@0xd84280000 > > > > > tf 0xd84280080 irq 21 > > > > > [    4.822990] ata3: SATA max UDMA/100 mmio m512@0xd84280000 > > > > > tf 0xd842800c0 irq 21 > > > > > > > > > > [    5.143502] ata1: SATA link up 3.0 Gbps (SStatus 123 > > > > > SControl 300) > > > > > [    5.164367] ata2: SATA link up 1.5 Gbps (SStatus 113 > > > > > SControl 310) > > > > > [    5.185174] ppc-of-ohci 4bffd0000.usb: irq 32, io mem > > > > > 0x4bffd0000 > > > > > [    5.206125] Unable to handle kernel paging request for > > > > > data at address 0x00000000 > > > > > [    5.228546] Faulting instruction address: 0xc043a2c8 > > > > > [    5.248577] Vector: 300 (Data Access) at [eddafae0] > > > > > [    5.268658]     pc: c043a2c8: sata_dwc_qc_issue+0xb8/0x204 > > > > Well, that's not good.  Can you translate that address to a > > > > line of code? > > > > > > > need some guidance on method . > > Enable CONFIG_DEBUG_INFO, then use this command: > > > > $ addr2line -e vmlinux 0xc043a2c8 > > > > Obviously substitute the actual crashing address if it changes. > > > addr2line -e vmlinux 0xc044b41c > arch/powerpc/lib/copy_32.S:? memcpy I suppose. Might be copy to unmapped memory. Anyway, can you enable debug options as I suggested including debug for sata driver ('dw_dmac_core.dyndbg dw_dmac.dyndbg sata_dwc_460ex.dydbg' to the cmdline and CONFIG_DYNAMIC_DEBUG=y)? -- Andy Shevchenko Intel Finland Oy