Re: i915_driver_irq_handler: irq 42: nobody cared

From: Jiri Slaby <jslaby@suse.cz>
To: Keith Packard <keithp@keithp.com>
Cc: dri-devel@lists.freedesktop.org,
	Chris Wilson <chris@chris-wilson.co.uk>,
	Jiri Slaby <jirislaby@gmail.com>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: i915_driver_irq_handler: irq 42: nobody cared
Date: Tue, 27 Mar 2012 10:42:40 +0200	[thread overview]
Message-ID: <4F717D80.9040207@suse.cz> (raw)
In-Reply-To: <4F717CE3.4040206@suse.cz>

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