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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [IVB,HSW bisected]Resuming form s3 cause Call Trace, with warm boot"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=80549#c3">Comment # 3</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - [IVB,HSW bisected]Resuming form s3 cause Call Trace, with warm boot"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=80549">bug 80549</a>
              from <span class="vcard"><a class="email" href="mailto:lei.a.liu@intel.com" title="liulei <lei.a.liu@intel.com>"> <span class="fn">liulei</span></a>
</span></b>
        <pre>(In reply to <a href="show_bug.cgi?id=80549#c2">comment #2</a>)
<span class="quote">> Created <span class=""><a href="attachment.cgi?id=102393" name="attach_102393" title="Patch to make it WARN-free">attachment 102393</a> <a href="attachment.cgi?id=102393&action=edit" title="Patch to make it WARN-free">[details]</a></span> <a href='page.cgi?id=splinter.html&bug=80549&attachment=102393'>[review]</a> [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</span >
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</pre>
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