Yus. I've even gone so far as to hardcode the IRQ number so I can be sure nothing crazy is happening, to no avail.
-Al
--- On Sun, 4/19/09, Pei Lin <telent997@xxxxxxxxx> wrote:
> From: Pei Lin <telent997@xxxxxxxxx>
> Subject: Re: request_irq returns -ENOSYS
> To: asmallcheesebox@xxxxxxxxx
>
> And the issue is still there?
>
> 2009/4/20 ASmallCheeseBox
> <asmallcheesebox@xxxxxxxxx>:
> >
> >
> > Yup, I've checked dev->IRQ against that which
> lspci -vv returns, and they're the same.
> >
> > Thanks for the reply.
> >
> > - Al
> >
> > --- On Sun, 4/19/09, Pei Lin
> <telent997@xxxxxxxxx> wrote:
> >
> >> From: Pei Lin <telent997@xxxxxxxxx>
> >> Subject: Re: request_irq returns -ENOSYS
> >> Cc: kernelnewbies@xxxxxxxxxxxx
> >>
> >> you are using the "IRQF_SHARED" mode to
> >> request_irq, and so the
> >> irq_number will be the one which others'
> device use.
> >> Are u sure
> >> "dev->irq" is the right one?
> >>
> >> BRs
> >>
> >> Lin
> >>
> >> 2009/4/20 ASmallCheeseBox
> >> <asmallcheesebox@xxxxxxxxx>:
> >> >
> >> >
> >> > Hi. I posted this to the forum a couple days
> ago, to
> >> no avail - I hope no-one minds me reposting here.
> >> >
> >> > My issue:
> >> >
> >> > So, I'm merrily writing my device driver
> for some
> >> homebrew hardware using the Xilinx PCIE endpoint.
> >> >
> >> > I'm sure this has been working in the
> past, but
> >> now I get -38 (-ENOSYS) returned from my call to
> >> request_irq. I can't for the life of me figure
> out why,
> >> although I've dug a bit and found that this is
> being
> >> returned by the following lines in
> kernel/irq/manage.c:
> >> >
> >> > 404: if (desc->chip == &no_irq_chip)
> >> > 405: return -ENOSYS;
> >> >
> >> > I think this is telling me that the kernel
> doesn't
> >> know how to handle IRQs that my card signals,
> because the
> >> IRQ handling hardware isn't supported. Am I
> wrong?
> >> >
> >> > I've tried three different kernel
> versions
> >> (2.6.22, 2.6.27, and 2.6.28) and I get the same
> behaviour on
> >> each. I've tried twiddling BIOS settings (and
> even
> >> upgraded the BIOS), I've tried messing about
> with the
> >> kernel command line, and I've tried
> registering other
> >> IRQ lines instead (ie, some native IRQ). I'm
> pretty much
> >> at a loss. Trying a different motherboard is on my
> to-try
> >> list, but I'm trying to avoid that (since I
> don't
> >> have any more yet).
> >> >
> >> > The relevant call to request_irq:
> >> >
> >> > // enable IRQ for card
> >> > long s=request_irq ( dev->irq,
> handle_interrupt,
> >> IRQF_SHARED, DRIVER_NAME, dev);
> >> > if ( s )
> >> > {
> >> > printk(KERN_ALERT "Failed to request
> IRQ %d
> >> (%d)\n", dev->irq, s);
> >> >
> >> > My IRQ handler is a stub which just returns
> >> IRQ_HANDLED.
> >> >
> >> > I've dug through documentation and my
> (albeit
> >> outdated) paper books, and can't find anything
> relevant
> >> (at least not for x86). Can anyone suggest
> anything I
> >> might've overlooked, or point me in the right
> direction?
> >> >
> >> > The motherboard has a VIA chipset, and the
> PCI-e card
> >> is a 1-lane Xilinx board. I've disabled every
> spurious
> >> function I can find in the BIOS.
> >> >
> >> > Thanks for any help..
> >> >
> >> >
> >> >
> >> >
> >> > --
> >> > To unsubscribe from this list: send an email
> with
> >> > "unsubscribe kernelnewbies" to
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> >> > Please read the FAQ at
> http://kernelnewbies.org/FAQ
> >> >
> >> >
> >
> >
> >
> >
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