3.3.0-rc5+git: WARNING: at drivers/gpu/drm/i915/i915_irq.c:652 ironlake_irq_handler+0x4ea/0x500()

Hi,

I am getting this on a i7 system on a DH67BL intel board on current git and wonder whether I should be worried:

------------[ cut here ]------------
WARNING: at drivers/gpu/drm/i915/i915_irq.c:652 ironlake_irq_handler+0x4ea/0x500()
Hardware name:         
Missed a PM interrupt
Modules linked in:
Pid: 0, comm: swapper/0 Not tainted 3.3.0-rc5+ #27
Call Trace:
 <IRQ>  [<ffffffff810939db>] ? warn_slowpath_common+0x7b/0xc0
 [<ffffffff81093ad5>] ? warn_slowpath_fmt+0x45/0x50
 [<ffffffff810ab2c6>] ? queue_work_on+0x16/0x20
 [<ffffffff81492afa>] ? ironlake_irq_handler+0x4ea/0x500
 [<ffffffff810ecfea>] ? handle_irq_event_percpu+0x3a/0x140
 [<ffffffff81099c83>] ? __do_softirq+0xb3/0x130
 [<ffffffff810ed131>] ? handle_irq_event+0x41/0x70
 [<ffffffff810f048d>] ? handle_edge_irq+0x6d/0x120
 [<ffffffff81041ae5>] ? handle_irq+0x15/0x20
 [<ffffffff81041253>] ? do_IRQ+0x53/0xd0
 [<ffffffff816cc12e>] ? common_interrupt+0x6e/0x6e
 <EOI>  [<ffffffff816cbb1b>] ? _raw_spin_unlock_irqrestore+0x1b/0x40
 [<ffffffff813e8737>] ? intel_idle+0xd7/0x150
 [<ffffffff813e871a>] ? intel_idle+0xba/0x150
 [<ffffffff815d6873>] ? cpuidle_idle_call+0x93/0xe0
 [<ffffffff8103f1e9>] ? cpu_idle+0x79/0xe0
 [<ffffffff81984c12>] ? start_kernel+0x366/0x371
 [<ffffffff8198444c>] ? x86_64_start_kernel+0x104/0x113
---[ end trace 8b3760a8c69d9501 ]---

$ cat /proc/interrupts

CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7

  0:       1801          0          0          0          0          0          0          0   IO-APIC-edge      timer
  1:          3          0          0          0          0          0          0          0   IO-APIC-edge      i8042
  8:          1          0          0          0          0          0          0          0   IO-APIC-edge      rtc0
  9:          0          0          0          0          0          0          0          0   IO-APIC-fasteoi   acpi
 12:          3          0          0          0          0          0          0          0   IO-APIC-edge      i8042
 16:        215          0          0          0          0          0          0          0   IO-APIC-fasteoi   ehci_hcd:usb1
 23:  829615563          0          0          0          0          0          0          0   IO-APIC-fasteoi   ehci_hcd:usb2
 40:          0          0          0          0          0          0          0          0   PCI-MSI-edge      PCIe PME
 41:          0          0          0          0          0          0          0          0   PCI-MSI-edge      PCIe PME
 42:    4300572          0          0          0          0          0          0          0   PCI-MSI-edge      i915
 43:   51614938          0          0          0          0          0          0          0   PCI-MSI-edge      ahci
 44:   35008209          0          0          0          0          0          0          0   PCI-MSI-edge      eth0
NMI:          0          0          0          0          0          0          0          0   Non-maskable interrupts
LOC:  419860182   17318718   22409016   16940072    3696355    2776406    5544045    5374801   Local timer interrupts
SPU:          0          0          0          0          0          0          0          0   Spurious interrupts
PMI:          0          0          0          0          0          0          0          0   Performance monitoring interrupts
IWI:          0          0          0          0          0          0          0          0   IRQ work interrupts
RTR:          6          0          0          0          0          0          0          0   APIC ICR read retries
RES:   15246280    9404003     289674      34811      10270       4717       4437       3644   Rescheduling interrupts
CAL:        633        483        481        460        233        236        228        225   Function call interrupts
TLB:     382928     369632     370463     359784     381885     378229     393943     383276   TLB shootdowns
TRM:          0          0          0          0          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0          0          0          0          0   Threshold APIC interrupts
MCE:          0          0          0          0          0          0          0          0   Machine check exceptions
MCP:       1677       1677       1677       1677       1677       1677       1677       1677   Machine check polls
ERR:          0
MIS:          0

$ lspci 

00:00.0 Host bridge: Intel Corporation Sandy Bridge DRAM Controller (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Sandy Bridge Integrated Graphics Controller (rev 09) 00:16.0 Communication controller: Intel Corporation Cougar Point HECI Controller #1 (rev 04) 00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 05) 00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #2 (rev 05) 00:1b.0 Audio device: Intel Corporation Cougar Point High Definition Audio Controller (rev 05) 00:1c.0 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 1 (rev b5) 00:1c.3 PCI bridge: Intel Corporation Cougar Point PCI Express Root Port 4 (rev b5) 00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 05) 00:1f.0 ISA bridge: Intel Corporation Cougar Point LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation Cougar Point 6 port SATA AHCI Controller (rev 05) 00:1f.3 SMBus: Intel Corporation Cougar Point SMBus Controller (rev 05)
01:00.0 PCI bridge: Integrated Technology Express, Inc. Device 8892 (rev 10)
03:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host Controller (rev 04)

For the one fact about the future of which we can be certain is that it
will be utterly fantastic. -- Arthur C. Clarke, 1962

I created a Bugzilla entry at
https://bugzilla.kernel.org/show_bug.cgi?id=42907
for your bug/regression report, please add your address to the CC list in there, thanks!

Maciej Rutecki
http://www.mrutecki.pl