Messages in this thread | | | Date | Wed, 2 Jul 2008 12:11:53 +0100 | From | Alan Cox <> | Subject | Re: [PATCH] uio: User IRQ Mode |
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On Wed, 02 Jul 2008 19:59:51 +0900 Magnus Damm <magnus.damm@gmail.com> wrote:
> From: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com> > > This patch adds a "User IRQ Mode" to UIO. In this mode the user space driver > is responsible for acknowledging and re-enabling the interrupt. > Shared interrupts are not supported by this mode.
This doesn't work even for some non shared interrupts.
If I take a level triggered interrupt then the IRQ handler code must clear the IRQ before the line can be unmasked.
It might work for edge triggered providing you don't get too many edges before you respond (in which case we will decide its a stuck IRQ and turn it off for good). -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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