[Bug 80203] [HSW] trying to runtime suspend with power well enabled on 3.15

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80203

--- Comment #12 from Patrik Lundquist <patrik.lundquist at gmail.com> ---
Created attachment 106104
  --> https://bugs.freedesktop.org/attachment.cgi?id=106104&action=edit
3.17-rc4 dmesg with Ville's edp vdd locking patch backported

It looks much better after I backported Ville's patch. After a couple of
reboots and over ten suspend/resume cycles I've only got one stack dump (which
might be my fault).

[   95.314561] Call Trace:
[   95.314564]  [<ffffffff82778f98>] dump_stack+0x45/0x56
[   95.314567]  [<ffffffff8207132d>] warn_slowpath_common+0x7d/0xa0
[   95.314570]  [<ffffffff8207139c>] warn_slowpath_fmt+0x4c/0x50
[   95.314591]  [<ffffffffc0187fe8>] hsw_enable_pc8+0x5b8/0x660 [i915]
[   95.314600]  [<ffffffffc012d1d0>] ? __i915_drm_thaw+0x1d0/0x1d0 [i915]
[   95.314609]  [<ffffffffc012d22b>] i915_pm_suspend_late+0x5b/0x60 [i915]
[   95.314611]  [<ffffffff824d17fc>] dpm_run_callback+0x4c/0x100
[   95.314613]  [<ffffffff824d1fc0>] __device_suspend_late+0xb0/0x1a0
[   95.314615]  [<ffffffff824d20cf>] async_suspend_late+0x1f/0xa0
[   95.314617]  [<ffffffff820930c7>] async_run_entry_fn+0x37/0x130
[   95.314620]  [<ffffffff8208a53a>] process_one_work+0x18a/0x4a0
[   95.314622]  [<ffffffff8208b22b>] worker_thread+0x6b/0x5d0
[   95.314625]  [<ffffffff8208b1c0>] ? pool_mayday_timeout+0x1b0/0x1b0
[   95.314627]  [<ffffffff820905ab>] kthread+0xdb/0x100
[   95.314629]  [<ffffffff820904d0>] ? kthread_create_on_node+0x180/0x180
[   95.314632]  [<ffffffff82780ebc>] ret_from_fork+0x7c/0xb0
[   95.314634]  [<ffffffff820904d0>] ? kthread_create_on_node+0x180/0x180


Imre, please create a new bug for the VGA thingy if you want me to continue
testing it.

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