Re: [PATCH 01/03] uio: Add enable_irq() callback

From: Hans J. Koch
Date: Thu May 22 2008 - 16:19:16 EST

On Wed, May 21, 2008 at 08:58:24PM +0900, Magnus Damm wrote:
> On Tue, May 20, 2008 at 7:51 PM, Magnus Damm <magnus.damm@xxxxxxxxx> wrote:
> > Add enable_irq() callback to struct uio_info. This callback is needed by
> > the uio_platform driver so interrupts can be enabled before blocking.
> We can most likely use a single uio platform driver if this patch is
> acceptable. Any NAKs?

Yes. Your approach only allows enabling interrupts, but not disabling
them. And I don't like that it is not possible for generic userspace
tools to find out if a UIO device has this auto-irq-enabling capability
or not.

I just posted a patch that allows enabling _and_ disabling of irqs from
userspace by writing 0 or 1 to /dev/uioX. I've CCed you, could you
please test? If this doesn't do what you need, please let me know.


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