[Intel-gfx] WARNING: drm_mode_object_get called w/o mode_config lock

[Tomas Carnecky]

kernel: linux-2.6.git#master + airlied/drm-2.6.git#drm-next + small 
patch to enable MSI on GM965.

I have the internal LVDS display plus an external VGA display. But I 
also get this warning if I detach the external display.

tom

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WARNING: at drivers/gpu/drm/drm_crtc.c:213 drm_mode_object_get+0xb7/0xc0 
[drm]()
drm_mode_object_get called w/o mode_config lock
Modules linked in: i915(+) drm i2c_algo_bit cfbcopyarea ehci_hcd 
cfbimgblt cfbfillrect
Pid: 1227, comm: modprobe Tainted: G        W  2.6.28-rc7 #75
Call Trace:
  [<ffffffff8025dc67>] warn_slowpath+0xb7/0xf0
  [<ffffffff8025dc6d>] ? warn_slowpath+0xbd/0xf0
  [<ffffffff80251401>] ? dequeue_task_fair+0x281/0x290
  [<ffffffff8024e736>] ? dequeue_task+0x96/0xe0
  [<ffffffff802580bb>] ? finish_task_switch+0x2b/0xe0
  [<ffffffff80689caf>] ? thread_return+0x3d/0x68e
  [<ffffffff804179f2>] ? idr_get_empty_slot+0x112/0x2d0
  [<ffffffffa002d3c7>] drm_mode_object_get+0xb7/0xc0 [drm]
  [<ffffffffa002d5ae>] drm_mode_create+0x3e/0x50 [drm]
  [<ffffffffa00318b1>] drm_mode_duplicate+0x11/0x40 [drm]
  [<ffffffffa0031b62>] drm_add_edid_modes+0x132/0x6b0 [drm]
  [<ffffffffa002d36c>] ? drm_mode_object_get+0x5c/0xc0 [drm]
  [<ffffffffa002d47b>] ? 
drm_mode_connector_update_edid_property+0xab/0x1a0 [drm]
  [<ffffffffa00599f8>] intel_ddc_get_modes+0x48/0x70 [i915]
  [<ffffffffa0057dcb>] intel_lvds_init+0xeb/0x310 [i915]
  [<ffffffffa0055005>] intel_modeset_init+0x305/0x660 [i915]
  [<ffffffffa004a4e6>] i915_driver_load+0x606/0x6e0 [i915]
  [<ffffffffa00281a8>] drm_get_dev+0x2c8/0x470 [drm]
  [<ffffffffa0022b7e>] drm_init+0x9e/0xe0 [drm]
  [<ffffffffa0071000>] ? i915_init+0x0/0x4e [i915]
  [<ffffffffa007104c>] i915_init+0x4c/0x4e [i915]
  [<ffffffff8020903b>] _stext+0x3b/0x170
  [<ffffffff80440470>] ? vgacon_text_force+0x0/0x20
  [<ffffffff80287e5d>] sys_init_module+0xad/0x1e0
  [<ffffffff8022b44b>] system_call_fastpath+0x16/0x1b
---[ end trace 00650b641fe4d16d ]---