cardbus interrupt latency

From: Ralf Render (ralf.render_at_de.bosch.com)
Date: 08/13/04

  • Next message: Jonathan Neve: "A universal device driver library?" 
    Date: Fri, 13 Aug 2004 10:23:52 +0200

    Hi,

    i wrote a driver for a cardbus frame grabber card. Everything works fine
    except interrupt handling.
    If the card generates an interrupt it sometimes takes a long time before the
    drivers interrupt handler is executed.
    On the logic analyzer I can see that the interrupt on the PCI bus is
    asserted just before my interrupt handler.
    That means that something blocks interrupt assertion on the cardbus
    interface card.
    Does anybody have an idea who blocks the interrupts?

    I am running Suse 9.1 (kernel 2.6.4, yenta_socket).
    The cardbus interface card has got an original TI PCI1410 silicon.

    Thanks,

    Ralf

  • Next message: Jonathan Neve: "A universal device driver library?"

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