From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752015Ab3LLXd4 (ORCPT ); Thu, 12 Dec 2013 18:33:56 -0500 Received: from mail-la0-f53.google.com ([209.85.215.53]:63287 "EHLO mail-la0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751994Ab3LLXdz (ORCPT ); Thu, 12 Dec 2013 18:33:55 -0500 Date: Fri, 13 Dec 2013 02:31:25 +0300 From: Sergey Senozhatsky To: "Deucher, Alexander" Cc: David Airlie , Jerome Glisse , "dri-devel@lists.freedesktop.org" , "linux-kernel@vger.kernel.org" Subject: Re: [PATCH] radeon_pm: fix oops in hwmon_attributes_visible() and radeon_hwmon_show_temp_thresh() Message-ID: <20131212233125.GB2203@swordfish> References: <20131212232557.GA2203@swordfish> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.22 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On (12/12/13 23:29), Deucher, Alexander wrote: > Fix is already queued in my next -fixes pull. Thanks! > Nice. Thanks! -ss > Alex > > > -----Original Message----- > > From: Sergey Senozhatsky [mailto:sergey.senozhatsky@gmail.com] > > Sent: Thursday, December 12, 2013 6:26 PM > > To: Deucher, Alexander > > Cc: David Airlie; Jerome Glisse; dri-devel@lists.freedesktop.org; linux- > > kernel@vger.kernel.org > > Subject: [PATCH] radeon_pm: fix oops in hwmon_attributes_visible() and > > radeon_hwmon_show_temp_thresh() > > > > Since ec39f64bba radeon_hwmon_init() is using > > hwmon_device_register_with_groups(), which sets `rdev' as a device > > private driver_data, while hwmon_attributes_visible() and > > radeon_hwmon_show_temp_thresh() are still waiting for `drm_device'. > > fix them by using dev_get_drvdata(): > > > > BUG: unable to handle kernel paging request at 0000000000001e28 > > IP: [] hwmon_attributes_visible+0x18/0x3d [radeon] > > PGD 15057e067 PUD 151a8e067 PMD 0 > > Oops: 0000 [#1] PREEMPT SMP > > Call Trace: > > [] internal_create_group+0x114/0x1d9 > > [] sysfs_create_group+0xe/0x10 > > [] sysfs_create_groups+0x22/0x5f > > [] device_add+0x34f/0x501 > > [] device_register+0x15/0x18 > > [] hwmon_device_register_with_groups+0xb5/0xed > > [] radeon_hwmon_init+0x56/0x7c [radeon] > > [] radeon_pm_init+0x134/0x7e5 [radeon] > > [] ? kmem_cache_alloc+0x63/0xe3 > > [] radeon_modeset_init+0x75f/0x8ed [radeon] > > [] radeon_driver_load_kms+0xc6/0x187 [radeon] > > [] drm_dev_register+0xf9/0x1b4 [drm] > > [] drm_get_pci_dev+0x98/0x129 [drm] > > [] ? kfree+0x10a/0x166 > > [] ? radeon_pci_probe+0x91/0xac [radeon] > > [] radeon_pci_probe+0xa3/0xac [radeon] > > [] pci_device_probe+0x6e/0xcf > > [] driver_probe_device+0x98/0x1c4 > > [] __driver_attach+0x5c/0x7e > > [] ? __device_attach+0x38/0x38 > > [] bus_for_each_dev+0x7b/0x85 > > [] driver_attach+0x19/0x1b > > [] bus_add_driver+0x104/0x1ce > > [] driver_register+0x89/0xc5 > > [] __pci_register_driver+0x58/0x5b > > [] ? 0xffffffffa037efff > > [] drm_pci_init+0x86/0xea [drm] > > [] ? 0xffffffffa037efff > > [] radeon_init+0x97/0x1000 [radeon] > > [] do_one_initcall+0x7f/0x117 > > [] ? set_memory_nx+0x3b/0x3d > > [] load_module+0x1583/0x1bb4 > > [] ? store_uevent+0x35/0x35 > > [] ? finish_task_switch+0x3b/0x10c > > [] ? preempt_schedule_irq+0x5d/0x99 > > [] ? retint_restore_args+0x13/0x13 > > [] SyS_init_module+0xa0/0xaf > > [] tracesys+0xd4/0xd9 > > > > Signed-off-by: Sergey Senozhatsky > > > > --- > > > > drivers/gpu/drm/radeon/radeon_pm.c | 6 ++---- > > 1 file changed, 2 insertions(+), 4 deletions(-) > > > > diff --git a/drivers/gpu/drm/radeon/radeon_pm.c > > b/drivers/gpu/drm/radeon/radeon_pm.c > > index dc75bb6..984097b 100644 > > --- a/drivers/gpu/drm/radeon/radeon_pm.c > > +++ b/drivers/gpu/drm/radeon/radeon_pm.c > > @@ -552,8 +552,7 @@ static ssize_t > > radeon_hwmon_show_temp_thresh(struct device *dev, > > struct device_attribute *attr, > > char *buf) > > { > > - struct drm_device *ddev = dev_get_drvdata(dev); > > - struct radeon_device *rdev = ddev->dev_private; > > + struct radeon_device *rdev = dev_get_drvdata(dev); > > int hyst = to_sensor_dev_attr(attr)->index; > > int temp; > > > > @@ -580,8 +579,7 @@ static umode_t hwmon_attributes_visible(struct > > kobject *kobj, > > struct attribute *attr, int index) > > { > > struct device *dev = container_of(kobj, struct device, kobj); > > - struct drm_device *ddev = dev_get_drvdata(dev); > > - struct radeon_device *rdev = ddev->dev_private; > > + struct radeon_device *rdev = dev_get_drvdata(dev); > > > > /* Skip limit attributes if DPM is not enabled */ > > if (rdev->pm.pm_method != PM_METHOD_DPM && > > > >