[WARNING - 3.14-rc2] i915: pipe_off wait timed out

[Steven Rostedt]

I get the following splat in my tests running 3.14-rc2:

[    3.955123] WARNING: CPU: 0 PID: 1 at /work/autotest/nobackup/linux-test.git/drivers/gpu/drm/i915/intel_display.c:857 intel_wait_for_pipe_off+0x17a/0x2d0()
[    3.955124] pipe_off wait timed out
[    3.955127] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.0-rc2-test+ #10
[    3.955128] Hardware name:                  /DG965MQ, BIOS MQ96510J.86A.0372.2006.0605.1717 06/05/2006
[    3.955133]  0000000000000359 ffff88007d075868 ffffffff828dff7d 0000000000000006
[    3.955136]  ffff88007d0758b8 ffff88007d0758a8 ffffffff8106c015 0000000000001000^M
[    3.955139]  ffff880078d58000 0000000000071008 00000000fffb7b90 0000000000001000
[    3.955140] Call Trace:
[    3.955144]  [<ffffffff828dff7d>] dump_stack+0x77/0x9e
[    3.955147]  [<ffffffff8106c015>] warn_slowpath_common+0xa5/0xf0
[    3.955150]  [<ffffffff8106c0f1>] warn_slowpath_fmt+0x51/0x60
[    3.955153]  [<ffffffff81b74e02>] ? gen4_read32+0x52/0x70
[    3.955156]  [<ffffffff81b1cd0a>] intel_wait_for_pipe_off+0x17a/0x2d0
[    3.955158]  [<ffffffff81b1cf64>] intel_disable_pipe+0x104/0x110^M
[    3.955161]  [<ffffffff81b1e1ae>] i9xx_crtc_disable+0x11e/0x4a0
[    3.955163]  [<ffffffff81b28034>] intel_crtc_update_dpms+0x94/0xe0
[    3.955166]  [<ffffffff81b31c38>] intel_modeset_setup_hw_state+0x9f8/0x1020
[    3.955168]  [<ffffffff81b743c0>] ? gen4_write64+0x80/0x80
[    3.955170]  [<ffffffff81b322c2>] intel_modeset_gem_init+0x62/0x80
[    3.955173]  [<ffffffff81ae4f90>] i915_driver_load+0x15e0/0x1760
[    3.955176]  [<ffffffff81cafafb>] ? device_add+0x31b/0xa20
[    3.955180]  [<ffffffff8197c8a4>] drm_dev_register+0xb4/0x260
[    3.955182]  [<ffffffff8197fb5e>] drm_get_pci_dev+0x15e/0x320
[    3.955186]  [<ffffffff810d369d>] ? trace_hardirqs_on+0x1d/0x30
[    3.955188]  [<ffffffff81adf36e>] i915_pci_probe+0x4e/0x80
[    3.955191]  [<ffffffff8175524d>] pci_device_probe+0xdd/0x190
[    3.955194]  [<ffffffff81cb5928>] driver_probe_device+0xc8/0x550
[    3.955196]  [<ffffffff81cb5eab>] __driver_attach+0xfb/0x110
[    3.955198]  [<ffffffff81cb5db0>] ? driver_probe_device+0x550/0x550
[    3.955200]  [<ffffffff81cb2bce>] bus_for_each_dev+0x9e/0xf0
[    3.955202]  [<ffffffff81cb5481>] driver_attach+0x21/0x30
[    3.955204]  [<ffffffff81cb3aef>] bus_add_driver+0x16f/0x340
[    3.955207]  [<ffffffff81cb68a7>] driver_register+0xa7/0x190
[    3.955209]  [<ffffffff81754e7f>] __pci_register_driver+0x6f/0x80
[    3.955211]  [<ffffffff8197fe79>] drm_pci_init+0x159/0x170
[    3.955214]  [<ffffffff8356b260>] ? radeon_init+0xfb/0xfb^M
[    3.955217]  [<ffffffff8356b305>] i915_init+0xa5/0xae
[    3.955220]  [<ffffffff8351a5c5>] do_one_initcall+0xe1/0x1b2
[    3.955223]  [<ffffffff8351a832>] kernel_init_freeable+0x19c/0x29d
[    3.955225]  [<ffffffff8351996d>] ? loglevel+0x46/0x46
[    3.955228]  [<ffffffff828d2c50>] ? rest_init+0x120/0x120
[    3.955230]  [<ffffffff828d2c61>] kernel_init+0x11/0x1a0
[    3.955233]  [<ffffffff82900a3c>] ret_from_fork+0x7c/0xb0
[    3.955235]  [<ffffffff828d2c50>] ? rest_init+0x120/0x120^M
[    3.955256] ---[ end trace 708152452bf03fad ]---


Config attached.

-- Steve
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