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    SubjectRe: i915_driver_irq_handler: irq 42: nobody cared
    On 03/27/2012 10:40 AM, Jiri Slaby wrote:
    > Hi,
    >
    > I'm getting spurious interrupts leading to disabling the interrupt:
    > 42: 1916853 2471662 PCI-MSI-edge i915@pci:0000:00:02.0
    >
    > The message:
    > irq 42: nobody cared (try booting with the "irqpoll" option)
    > Pid: 20716, comm: virtuoso-t Not tainted 3.3.0-next-20120326_64+ #1673
    >
    > It is not new, but now I can reproduce it more-or-less reliably after an
    > hour or so. It usually happens when playing a game using wine.
    >
    > Do you want me to dump some registers when IRQ_NONE is returned from the
    > ISR? As this is MSI, nobody else can sit there.

    Also lspci:
    00:02.0 VGA compatible controller [0300]: Intel Corporation 82G33/G31
    Express Integrated Graphics Controller [8086:29c2] (rev 02) (prog-if 00
    [VGA controller])
    Subsystem: Intel Corporation 82G33/G31 Express Integrated
    Graphics Controller [8086:29c2]
    Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
    ParErr- Stepping- SERR- FastB2B- DisINTx+
    Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
    <TAbort- <MAbort- >SERR- <PERR- INTx-
    Latency: 0
    Interrupt: pin A routed to IRQ 42
    Region 0: Memory at feb80000 (32-bit, non-prefetchable) [size=512K]
    Region 1: I/O ports at ec00 [size=8]
    Region 2: Memory at d0000000 (32-bit, prefetchable) [size=256M]
    Region 3: Memory at fea00000 (32-bit, non-prefetchable) [size=1M]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Address: fee0300c Data: 4179
    Capabilities: [d0] Power Management version 2
    Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
    PME(D0-,D1-,D2-,D3hot-,D3cold-)
    Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
    Kernel driver in use: i915
    00: 86 80 c2 29 07 04 90 00 02 00 00 03 00 00 00 00
    10: 00 00 b8 fe 01 ec 00 00 08 00 00 d0 00 00 a0 fe
    20: 00 00 00 00 00 00 00 00 00 00 00 00 86 80 c2 29
    30: 00 00 00 00 90 00 00 00 00 00 00 00 05 01 00 00
    40: 09 00 0b 01 00 00 00 00 01 00 00 00 00 00 00 00
    50: 00 00 30 02 c9 03 00 00 00 00 00 00 00 00 80 af
    60: 00 00 02 02 00 00 00 00 00 00 00 00 00 00 00 00
    70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    90: 05 d0 01 00 0c 30 e0 fe 79 41 00 00 00 00 00 00
    a0: 11 11 00 00 00 00 06 03 00 00 00 00 00 00 00 00
    b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
    d0: 01 00 22 00 00 00 00 00 00 00 00 00 00 01 02 00
    e0: 00 00 00 00 00 00 00 00 00 80 00 00 00 00 00 00
    f0: 10 00 00 00 00 00 00 00 90 0f 03 00 e4 e0 5b af

    > thanks,
    -- js suse labs



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