[Bug 84903] [BSW] System fail to enter S3 with system hang up after load i915 driver

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84903

--- Comment #4 from Ville Syrjala <ville.syrjala at linux.intel.com> ---
(In reply to wendy.wang from comment #2)
> Verified the git://gitorious.org/vsyrjala/linux.git chv_stuff_21 + attached
> patch, on BSW B1 with RVP FAB1 board, 
> Appear below call trace when wake up S3, details pls refer to attached
> dmesg-S3.log file.
> 
> [  127.767593] Call Trace:
> [  127.767603]  [<ffffffff81715d26>] ? dump_stack+0x41/0x51
> [  127.767609]  [<ffffffff810373c0>] ? warn_slowpath_common+0x6f/0x84
> [  127.767636]  [<ffffffffa007970d>] ? intel_gen6_powersave_work+0xf7/0xe9f
> [i915]
> [  127.767663]  [<ffffffffa007970d>] ? intel_gen6_powersave_work+0xf7/0xe9f
> [i915]
> [  127.767669]  [<ffffffff810469a6>] ? process_one_work+0x19f/0x2a8
> [  127.767672]  [<ffffffff810472e2>] ? worker_thread+0x278/0x364
> [  127.767676]  [<ffffffff8104706a>] ? rescuer_thread+0x219/0x219
> [  127.767681]  [<ffffffff8104a7ef>] ? kthread+0xca/0xd2
> [  127.767685]  [<ffffffff8104a725>] ? kthread_create_on_node+0x162/0x162
> [  127.767690]  [<ffffffff8171b4ec>] ? ret_from_fork+0x7c/0xb0
> [  127.767694]  [<ffffffff8104a725>] ? kthread_create_on_node+0x162/0x162

That looks to to be a BIOS bug to me:
"PCBR offset : 0x0"

The BIOS is in charge of setting up the power context, so I believe it should
also restore the address on resume.

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