From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756609AbaHVPsw (ORCPT ); Fri, 22 Aug 2014 11:48:52 -0400 Received: from mout.web.de ([212.227.17.12]:50659 "EHLO mout.web.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756466AbaHVPsu (ORCPT ); Fri, 22 Aug 2014 11:48:50 -0400 Date: Fri, 22 Aug 2014 17:48:46 +0200 From: Julian Wollrath To: linux-kernel@vger.kernel.org Subject: Trace with v3.17-rc1 while trying to enable power saving for pci device Message-ID: <20140822174846.18eba9a2@saldaea> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K0:41Iy4J5yIOt5+jhDEIrYUGFYzoQNiJyp9Et4TYHl94Ls9EWpcPj 1+37iHEzJ+wEjMlPqgkBDUHkzZs84/NHSWiJ42E27BUDXw2hSBij/DONe6tmE+xtCUeM3qN E/D1GqqVAMLPml4f3jzlmHaSdCrImW+1INGROHOi8ezext4iNUi+BfxUVaNv9ZDFdv6lqLh hatiMewh2myVNLFLfxOpw== X-UI-Out-Filterresults: notjunk:1; Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, I just tried out the current git master (commit 5317821c08) and got the following trace: [ 25.637181] ------------[ cut here ]------------ [ 25.637191] WARNING: CPU: 0 PID: 756 at fs/proc/generic.c:521 remove_proc_entry+0x170/0x180() [ 25.637194] remove_proc_entry: removing non-empty directory 'irq/23', leaking at least 'ehci_hcd:usb4' [ 25.637196] Modules linked in: ecb btusb bluetooth crc16 arc4 iwldvm x86_pkg_temp_thermal mac80211 intel_powerclamp snd_hda_codec_hdmi snd_hda_codec_realtek i915 snd_hda_codec_generic snd_hda_intel intel_rapl coretemp kvm_intel snd_hda_controller snd_hda_codec kvm snd_hwdep iwlwifi psmouse snd_pcm thinkpad_acpi uvcvideo cfg80211 evdev serio_raw nvram snd_timer i2c_algo_bit videobuf2_vmalloc videobuf2_memops drm_kms_helper videobuf2_core snd v4l2_common drm soundcore wmi pcspkr tpm_tis tpm rfkill videodev battery ac video i2c_i801 i2ccore button processor sch_fq fuse autofs4 dm_crypt dm_mod sd_mod crc_t10dif crct10dif_generic crct10dif_pclmul crct10dif_common crc32_pclmul crc32c_intel ghash_clmulni_intel ahci libahci libata scsi_mod ehci_pci ehci_hcd xhci_hcd sdhci_pci e1000e sdhci ptp pps_core mmc_core usbcore thermal usb_common thermal_sys [ 25.637257] CPU: 0 PID: 756 Comm: rc.local Not tainted 3.17.0-rc1+ #1 [ 25.637259] Hardware name: LENOVO 23250BM/23250BM, BIOS G2ETA1WW (2.61 ) 04/22/2014 [ 25.637261] 0000000000000009 ffffffff814b56ef ffff8800c9b7fc30 ffffffff8106eb42 [ 25.637265] ffff880037648c40 ffff8800c9b7fc80 0000000000000002 ffff8800c9b7fce6 [ 25.637268] ffff8800c9b7fce6 ffffffff8106eba7 ffffffff81719f08 ffff880000000030 [ 25.637271] Call Trace: [ 25.637277] [] ? dump_stack+0x41/0x51 [ 25.637283] [] ? warn_slowpath_common+0x72/0x90 [ 25.637286] [] ? warn_slowpath_fmt+0x47/0x50 [ 25.637291] [] ? proc_entry_rundown+0x41/0x80 [ 25.637294] [] ? remove_proc_entry+0x170/0x180 [ 25.637300] [] ? unregister_irq_proc+0xb7/0xc0 [ 25.637303] [] ? free_desc+0x22/0x60 [ 25.637307] [] ? irq_free_descs+0x32/0x80 [ 25.637312] [] ? mp_unmap_irq+0x74/0xb0 [ 25.637316] [] ? do_pci_disable_device+0x4c/0x60 [ 25.637319] [] ? pci_disable_device+0x40/0xb0 [ 25.637330] [] ? suspend_common+0x52/0x150 [usbcore] [ 25.637335] [] ? pci_pm_runtime_suspend+0x57/0x150 [ 25.637340] [] ? __rpm_callback+0x26/0x60 [ 25.637343] [] ? rpm_callback+0x18/0x80 [ 25.637346] [] ? rpm_suspend+0x107/0x600 [ 25.637350] [] ? __wake_up+0x2f/0x50 [ 25.637353] [] ? pm_runtime_allow+0x4d/0x50 [ 25.637357] [] ? control_store+0xbd/0xc0 [ 25.637361] [] ? kernfs_fop_write+0xdb/0x160 [ 25.637365] [] ? vfs_write+0xad/0x1e0 [ 25.637368] [] ? SyS_write+0x3d/0xa0 [ 25.637373] [] ? system_call_fastpath+0x16/0x1b [ 25.637375] ---[ end trace 40fa9ae9acda7087 ]--- I get the trace due to enabling power saving via 'echo 'auto' > /sys/bus/pci/devices/0000:00:1d.0/power/control' with 00:1d.0 being the USB controller (according to lspci): 00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04) If you need more information, please do not hesitate to ask. With best regards, Julian Wollrath