4.10-rc5+ WARNING: CPU: 3 PID: 1 at ./include/drm/drm_crtc.h:857 drm_kms_helper_poll_enable.part.4+0xa8/0xc0

From: Borislav Petkov
Date: Thu Jan 26 2017 - 02:48:29 EST


Hi all,

I see this brand new warning when booting here.

Top commit is v4.10-rc5-107-g883af14e67e8 from Linus' master.

[ 2.209255] [drm] Initialized
[ 2.210636] [drm] Memory usable by graphics device = 2048M
[ 2.210732] [drm] Replacing VGA console driver
[ 2.211517] Console: switching to colour dummy device 80x25
[ 2.218452] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 2.218471] [drm] Driver supports precise vblank timestamp query.
[ 2.219510] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
[ 2.297687] ------------[ cut here ]------------
[ 2.297714] WARNING: CPU: 3 PID: 1 at ./include/drm/drm_crtc.h:857 drm_kms_helper_poll_enable.part.4+0xa8/0xc0
[ 2.297732] Modules linked in:
[ 2.297745] CPU: 3 PID: 1 Comm: swapper/0 Not tainted 4.10.0-rc5+ #1
[ 2.297757] Hardware name: LENOVO 2320CTO/2320CTO, BIOS G2ET86WW (2.06 ) 11/13/2012
[ 2.297772] Call Trace:
[ 2.297787] dump_stack+0x67/0x92
[ 2.297801] __warn+0xcb/0xf0
[ 2.297812] warn_slowpath_null+0x1d/0x20
[ 2.297824] drm_kms_helper_poll_enable.part.4+0xa8/0xc0
[ 2.297837] drm_kms_helper_poll_init+0xaa/0xb0
[ 2.297851] i915_driver_load+0x1384/0x1430
[ 2.297864] i915_pci_probe+0x2d/0x50
[ 2.297876] local_pci_probe+0x42/0xa0
[ 2.297888] ? pci_match_device+0xe0/0x110
[ 2.297900] pci_device_probe+0xdb/0x130
[ 2.297915] driver_probe_device+0x204/0x2e0
[ 2.297927] __driver_attach+0x9f/0xb0
[ 2.297938] ? driver_probe_device+0x2e0/0x2e0
[ 2.297950] bus_for_each_dev+0x66/0xa0
[ 2.297961] driver_attach+0x1e/0x20
[ 2.297972] bus_add_driver+0x1b4/0x230
[ 2.297986] ? mipi_dsi_bus_init+0x12/0x12
[ 2.297998] driver_register+0x60/0xe0
[ 2.298009] ? mipi_dsi_bus_init+0x12/0x12
[ 2.298020] __pci_register_driver+0x5d/0x60
[ 2.298032] i915_init+0x52/0x55
[ 2.298045] do_one_initcall+0x53/0x1a0
[ 2.298057] ? parse_args+0x260/0x3e0
[ 2.298071] kernel_init_freeable+0x11d/0x1a3
[ 2.298084] ? rest_init+0x140/0x140
[ 2.298094] kernel_init+0xe/0x100
[ 2.298104] ret_from_fork+0x2e/0x40
[ 2.298120] ---[ end trace a758b84f8e587539 ]---
[ 2.302699] ACPI: Video Device [VID] (multi-head: yes rom: no post: no)
[ 2.304017] input: Video Bus as /devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A08:00/LNXVIDEO:00/input/input3
[ 2.304287] [drm] Initialized i915 1.6.0 20161121 for 0000:00:02.0 on minor 0


--
Regards/Gruss,
Boris.

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