From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756320AbbCEPEY (ORCPT ); Thu, 5 Mar 2015 10:04:24 -0500 Received: from mail-qc0-f172.google.com ([209.85.216.172]:39564 "EHLO mail-qc0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752625AbbCEPEX (ORCPT ); Thu, 5 Mar 2015 10:04:23 -0500 Message-ID: <54F87075.5020105@hurleysoftware.com> Date: Thu, 05 Mar 2015 10:04:21 -0500 From: Peter Hurley User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0 MIME-Version: 1.0 To: Maxime Ripard , Laurent Pinchart , Vinod Koul CC: Linux kernel Subject: [4.0-rc+] WARNING: CPU: 0 PID: 1 at ./drivers/dma/dmaengine.c:863 dma_async_device_register+0xe0/0x540() Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org First boot of 4.0-rc+ gave me [1] on a Beaglebone Black due to commit ecc19d17868be9c9f8f00ed928791533c420f3e0 Author: Maxime Ripard Date: Mon Nov 17 14:42:53 2014 +0100 dmaengine: Add a warning for drivers not using the generic slave caps retrieval For the slave caps retrieval to be really useful, most drivers need to implement it. Hence, we need to be slightly more aggressive, and trigger a warning at registration time for drivers that don't fill their caps infos in order to encourage them to implement it. Signed-off-by: Maxime Ripard Acked-by: Laurent Pinchart Signed-off-by: Vinod Koul Regards, Peter Hurley [1] [ 1.848374] WARNING: CPU: 0 PID: 1 at /home/peter/src/kernels/mainline/drivers/dma/dmaengine.c:863 dma_async_device_register+0xe0/0x540() [ 1.860798] this driver doesn't support generic slave capabilities reporting [ 1.867893] Modules linked in: [ 1.870993] CPU: 0 PID: 1 Comm: swapper Not tainted 4.0.0-rc2+ #115 [ 1.877302] Hardware name: Generic AM33XX (Flattened Device Tree) [ 1.883478] [] (unwind_backtrace) from [] (show_stack+0x20/0x24) [ 1.891307] [] (show_stack) from [] (dump_stack+0x24/0x28) [ 1.898602] [] (dump_stack) from [] (warn_slowpath_common+0x94/0xc0) [ 1.906753] [] (warn_slowpath_common) from [] (warn_slowpath_fmt+0x40/0x48) [ 1.915515] [] (warn_slowpath_fmt) from [] (dma_async_device_register+0xe0/0x540) [ 1.924806] [] (dma_async_device_register) from [] (cppi41_dma_probe+0x470/0x4c0) [ 1.934397] [] (cppi41_dma_probe) from [] (platform_drv_probe+0x54/0xb4) [ 1.942924] [] (platform_drv_probe) from [] (driver_probe_device+0x14c/0x3a8) [ 1.951861] [] (driver_probe_device) from [] (__device_attach+0x50/0x54) [ 1.960360] [] (__device_attach) from [] (bus_for_each_drv+0x68/0x9c) [ 1.968596] [] (bus_for_each_drv) from [] (device_attach+0x84/0x98) [ 1.976656] [] (device_attach) from [] (bus_probe_device+0x94/0xb8) [ 1.984717] [] (bus_probe_device) from [] (device_add+0x3dc/0x59c) [ 1.992700] [] (device_add) from [] (of_device_add+0x44/0x4c) [ 2.000242] [] (of_device_add) from [] (of_platform_device_create_pdata+0x140/0x234) [ 2.009788] [] (of_platform_device_create_pdata) from [] (of_platform_bus_create+0x10c/0x234) [ 2.020118] [] (of_platform_bus_create) from [] (of_platform_populate+0x6c/0xc8) [ 2.029319] [] (of_platform_populate) from [] (am335x_child_probe+0x38/0x54) [ 2.038168] [] (am335x_child_probe) from [] (platform_drv_probe+0x54/0xb4) [ 2.046840] [] (platform_drv_probe) from [] (driver_probe_device+0x14c/0x3a8) [ 2.055774] [] (driver_probe_device) from [] (__driver_attach+0x9c/0xa0) [ 2.064268] [] (__driver_attach) from [] (bus_for_each_dev+0x70/0xa4) [ 2.072501] [] (bus_for_each_dev) from [] (driver_attach+0x2c/0x30) [ 2.080561] [] (driver_attach) from [] (bus_add_driver+0x170/0x22c) [ 2.088623] [] (bus_add_driver) from [] (driver_register+0x88/0x108) [ 2.096770] [] (driver_register) from [] (__platform_driver_register+0x64/0x6c) [ 2.105884] [] (__platform_driver_register) from [] (am335x_child_init+0x1c/0x20) [ 2.115171] [] (am335x_child_init) from [] (do_one_initcall+0xe8/0x230) [ 2.123592] [] (do_one_initcall) from [] (kernel_init_freeable+0x1e0/0x284) [ 2.132355] [] (kernel_init_freeable) from [] (kernel_init+0x1c/0x100) [ 2.140681] [] (kernel_init) from [] (ret_from_fork+0x14/0x24)