[Bug 80549] [IVB,HSW bisected]Resuming form s3 cause Call Trace, with warm boot

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80549

--- Comment #3 from liulei <lei.a.liu at intel.com> ---
(In reply to comment #2)
> Created attachment 102393 [details] [review]
> Patch to make it WARN-free
> 
> Hi
> 
> This is probably not going to be the patch that is going to be merged, but
> at least it solves the problems I could reproduce, so if you can confirm it
> also solves the problem of your machine, then I can know we are on the same
> page :)
> 
> Thanks,
> Paulo
Hi,

Your patch fixes this issue, but, I got a ton of new Call Trace like below:
[   24.668170] sd 7:0:0:0: [sda] Stopping disk
[   24.691978] ------------[ cut here ]------------
[   24.691990] WARNING: CPU: 3 PID: 4123 at
drivers/gpu/drm/i915/intel_pm.c:4882 intel_suspend_gt_powersave+0x1f/0x38
[i915]()
[   24.692126] ------------[ cut here ]------------
[   24.692132] WARNING: CPU: 3 PID: 4123 at drivers/gpu/drm/i915/i915_irq.c:423
intel_set_pch_fifo_underrun_reporting+0xde/0x145 [i915]()
[   24.713805] ------------[ cut here ]------------
[   24.713814] WARNING: CPU: 2 PID: 4123 at drivers/gpu/drm/i915/i915_irq.c:423
intel_set_pch_fifo_underrun_reporting+0x12b/0x145 [i915]()
[   25.969939] WARNING: CPU: 2 PID: 6 at drivers/gpu/drm/i915/intel_pm.c:4894
intel_disable_gt_powersave+0x27/0x3e7 [i915]()
[   26.043297] ------------[ cut here ]------------
[   26.043304] WARNING: CPU: 1 PID: 6 at drivers/gpu/drm/i915/i915_irq.c:139
intel_set_cpu_fifo_underrun_reporting+0x249/0x264 [i915]()
[   26.043388] WARNING: CPU: 1 PID: 6 at drivers/gpu/drm/i915/i915_irq.c:423
intel_set_pch_fifo_underrun_reporting+0x12b/0x145 [i915]()
[   26.051902] WARNING: CPU: 1 PID: 6 at drivers/gpu/drm/i915/i915_irq.c:423
ibx_hpd_irq_setup+0xa0/0xd7 [i915]()
[   27.758916] WARNING: CPU: 1 PID: 3793 at drivers/gpu/drm/i915/i915_irq.c:209
gen6_enable_rps_interrupts+0x39/0x5c [i915]()

My testing based on last tesing (ac710a93740e609759fa75dacdc96f1dfc34b5c5), and
patch your attachment on it. Was I using right branch to test? If I
misunderstood what you said, Please correct me. I attach new Call Trace

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