On Friday 18 February 2011, Thomas Gleixner wrote:
> On Fri, 18 Feb 2011, Arnd Bergmann wrote:
> > On Friday 18 February 2011, Pratheesh Gangadhar wrote:
> > > Signed-off-by: Pratheesh Gangadhar <[email protected]>
> > > +static irqreturn_t pruss_handler(int irq, struct uio_info *dev_info)
> > > +{
> > > + return IRQ_HANDLED;
> > > +}
> >
> > An empty interrupt handler is rather pointless. I guess you really
> > notify user space when the interrupt handler gets called, as this
> > is the main point of a UIO driver as far as I understand it.
>
> The UIO core code does this for you when the driver handler returns
> IRQ_HANDLED
Ah, right.
> but the empty handler raises a different questions:
>
> Is the interrupt edge triggerd or how do you avoid an irq storm here?
> Usually UIO drivers are requested to mask the interrupt in the device
> itself.
If it's edge triggered, it should not advertise IRQF_SHARED, right?
Arnd
_______________________________________________
Davinci-linux-open-source mailing list
[email protected]
http://linux.davincidsp.com/mailman/listinfo/davinci-linux-open-source
