[Intel-gfx] i915_driver_irq_handler: irq 42: nobody cared

Daniel Vetter daniel at ffwll.ch
Tue Mar 27 10:57:49 CEST 2012

On Tue, Mar 27, 2012 at 10:40:03AM +0200, Jiri Slaby wrote:
> Hi,
> I'm getting spurious interrupts leading to disabling the interrupt:
>  42:    1916853    2471662   PCI-MSI-edge      i915 at 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.

Yeah, dumping some interrupt regs if the isr returns IRQ_NONE sounds good.
For a start just dump everything that the isr itself reads out or writes
back - I think we can ignore subordinate interrupt sources in i915 for now.

And please mind the guy with bad memory and tell us which chip you have

Yours, Daniel
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48

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