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    SubjectRe: do_IRQ: 0.83/0.84 No irq handler for vector
    Nikos Chantziaras wrote:
    > Nikos Chantziaras wrote:
    >> Kernel 2.6.26 (on x86-64) gives "do_IRQ: 0.83 No irq handler for
    >> vector" (and "do_IRQ: 0.83", but less often) warnings periodically.
    >
    > I changed the kernel config:
    >
    > - CONFIG_PCI_MSI=y
    > + # CONFIG_PCI_MSI is not set
    >
    > In other words I disabled Message Signaled Interrupt support. Now
    > instead of "do_IRQ: 0.83 No irq handler for vector" I get:
    >
    > +------ PCI-Express Device Error ------+
    > Error Severity : Uncorrected (Non-Fatal)
    > PCIE Bus Error type : Transaction Layer
    > Flow Control Protocol : First
    > Receiver ID : 0010
    > VendorID=1106h, DeviceID=a208h, Bus=00h, Device=02h, Function=00h
    > Broadcast error_detected message
    > Broadcast mmio_enabled message
    > Broadcast resume message
    > AER driver successfully recovered
    >
    > (Repeated as many times as the "do_IRQ" message previously.)
    >
    > In case someone needs it, this is my complete dmesg:
    >
    > http://realnc.pastebin.com/d6534029
    >
    > and this is the kernel configuration:
    > http://bugs.freedesktop.org/attachment.cgi?id=17912

    My guess is some device is that some device is generating MSI interrupts
    without any handler being registered for it, and with MSI support
    disabled it now generates a master abort instead. Most likely whatever
    device is connected to the Bus=00h, Device=02h, Function=00h bridge. Can
    you post "lspci -vv" output?


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