Bug 74033

Summary:	[BYT] DP i2c warning on module unload
Product:	DRI	Reporter:	Jesse Barnes <jbarnes>
Component:	DRM/Intel	Assignee:	Antti Koskipaa <antti.koskipaa>
Status:	CLOSED FIXED	QA Contact:	Intel GFX Bugs mailing list <intel-gfx-bugs>
Severity:	normal
Priority:	medium	CC:	intel-gfx-bugs
Version:	unspecified
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Bug Depends on:
Bug Blocks:	74161

Description Jesse Barnes 2014-01-24 23:44:36 UTC

[   63.081970] drm_kms_helper: drm: unregistered panic notifier
[   63.110173] ------------[ cut here ]------------
[   63.110187] WARNING: CPU: 1 PID: 1616 at fs/sysfs/group.c:214 sysfs_remove_group+0xb9/0xc0()
[   63.110191] sysfs group c29498c8 not found for kobject 'i2c-6'
[   63.110194] Modules linked in: coretemp kvm_intel kvm crc32_pclmul snd_hda_codec_hdmi aesni_intel snd_hda_codec_realtek aes_i586 xts lrw gf128mul ablk_helper cryptd snd_hda_intel hid_sensor_accel_3d hid_sensor_gyro_3d hid_sensor_magn_3d hid_sensor_trigger industrialio_triggered_buffer kfifo_buf industrialio hid_sensor_iio_common snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device snd_timer dm_multipath scsi_dh microcode snd hid_sensor_hub soundcore dw_dmac_pci dw_dmac_core ppdev asix usbnet mii rfcomm bnep bluetooth parport_pc binfmt_misc mac_hid lp parport nls_iso8859_1 hid_generic usbhid hid dm_mirror dm_region_hash dm_log igb dca i915(O-) ptp pps_core i2c_algo_bit drm_kms_helper(O) video drm(O) ahci libahci
[   63.110282] CPU: 1 PID: 1616 Comm: rmmod Tainted: G        W  O 3.13.0-rc8+ #1
[   63.110286] Hardware name: NEXCOM VTC1010/Aptio CRB, BIOS 5.6.5 09/24/2013
[   63.110289]  00000000 00000000 f2bf7d0c c264be23 f2bf7d4c f2bf7d3c c20538de c283cb2c
[   63.110300]  f2bf7d68 00000650 c2836ae1 000000d6 c21d64e9 c21d64e9 00000000 c29498c8
[   63.110310]  f70a18e4 f2bf7d54 c2053933 00000009 f2bf7d4c c283cb2c f2bf7d68 f2bf7d7c
[   63.110320] Call Trace:
[   63.110330]  [<c264be23>] dump_stack+0x41/0x52
[   63.110338]  [<c20538de>] warn_slowpath_common+0x7e/0xa0
[   63.110344]  [<c21d64e9>] ? sysfs_remove_group+0xb9/0xc0
[   63.110350]  [<c21d64e9>] ? sysfs_remove_group+0xb9/0xc0
[   63.110356]  [<c2053933>] warn_slowpath_fmt+0x33/0x40
[   63.110362]  [<c21d64e9>] sysfs_remove_group+0xb9/0xc0
[   63.110368]  [<c2412047>] dpm_sysfs_remove+0x37/0x40
[   63.110375]  [<c24092d4>] device_del+0x34/0x170
[   63.110382]  [<c2409431>] device_unregister+0x21/0x60
[   63.110387]  [<c21d58a6>] ? sysfs_remove_link+0x16/0x30
[   63.110393]  [<c240daf2>] ? class_compat_remove_link+0x42/0x50
[   63.110400]  [<c24f94bd>] i2c_del_adapter+0x1ad/0x2c0
[   63.110405]  [<c24f7e20>] ? i2c_do_del_adapter+0xe0/0xe0
[   63.110412]  [<c215eb4d>] ? kfree+0xcd/0x100
[   63.110457]  [<f99ffb1d>] intel_dp_encoder_destroy+0x1d/0x70 [i915]
[   63.110483]  [<f880f43a>] drm_mode_config_cleanup+0x3a/0x210 [drm]
[   63.110521]  [<f99f456f>] intel_modeset_cleanup+0xbf/0xd0 [i915]
[   63.110549]  [<f99be1f6>] i915_driver_unload+0x246/0x2f0 [i915]
[   63.110572]  [<f8809443>] drm_dev_unregister+0x23/0x90 [drm]
[   63.110593]  [<f88094ed>] drm_put_dev+0x3d/0x70 [drm]
[   63.110623]  [<f99ba615>] i915_pci_remove+0x15/0x20 [i915]
[   63.110630]  [<c23387ff>] pci_device_remove+0x2f/0xa0
[   63.110638]  [<c240c601>] __device_release_driver+0x61/0xc0
[   63.110645]  [<c240cebf>] driver_detach+0x8f/0xa0
[   63.110654]  [<c240c2df>] bus_remove_driver+0x4f/0xc0
[   63.110662]  [<c240d498>] driver_unregister+0x28/0x60
[   63.110668]  [<c20cebd2>] ? stop_cpus+0x32/0x40
[   63.110675]  [<c20bd4f0>] ? module_refcount+0x90/0x90
[   63.110682]  [<c2337655>] pci_unregister_driver+0x15/0x60
[   63.110705]  [<f880b39f>] drm_pci_exit+0x9f/0xb0 [drm]
[   63.110746]  [<f9a3030a>] i915_exit+0x1b/0x1d [i915]
[   63.110752]  [<c20bf778>] SyS_delete_module+0x158/0x1f0
[   63.110760]  [<c2173aed>] ? ____fput+0xd/0x10
[   63.110766]  [<c206f0fe>] ? task_work_run+0x7e/0xb0
[   63.110774]  [<c265a40d>] sysenter_do_call+0x12/0x28
[   63.110778] ---[ end trace 43b74c05f338a183 ]---
[   63.120062] [drm] Module unloaded
[   63.149171] [drm] Initialized drm 1.1.0 20060810
[   63.177079] [drm:i915_dump_device_info], i915 device info: gen=7, pciid=0x0f3

Comment 1 Imre Deak 2014-01-30 13:05:59 UTC

This looks like bug 70523, which has a proposed fix for it.

Comment 2 Antti Koskipaa 2014-02-19 11:11:54 UTC

Now that bug 70523 has a fix in -nightly, can you retest?

Comment 3 Daniel Vetter 2014-03-03 14:23:35 UTC

Presuming closed - the dp fumble is fixed in -nightly and a generic sysfs/kernfs fumble should be fixed now that -nightly has rolled forward to -rc5. Please scream (and reopen) if this isn't the case.

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