Messages in this thread | | | Subject | Re: [PATCH] 2.6.18-rt7: PowerPC: fix breakage in threaded fasteoi type IRQ handlers | From | Benjamin Herrenschmidt <> | Date | Mon, 20 Nov 2006 07:04:09 +1100 |
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On Mon, 2006-11-20 at 07:00 +1100, Benjamin Herrenschmidt wrote: > On Sun, 2006-11-19 at 22:43 +0300, Sergei Shtylyov wrote: > > As fasteoi type chips never had to define their ack() method before the > > recent Ingo's change to handle_fasteoi_irq(), any attempt to execute handler > > in thread resulted in the kernel crash. So, define their ack() methods to be > > the same as their eoi() ones... > > > > Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> > > > > --- > > Since there was no feedback on three solutions I suggested, I'm going the way > > of least resistance and making the fasteoi type chips behave the way that > > handle_fasteoi_irq() is expecting from them... > > Wait wait wait .... Can somebody (Ingo ?) explain me why the fasteoi > handler is being changed and what is the rationale for adding an ack > that was not necessary before ?
To be more precise, I don't see in what circumstances a fasteoi type PIC would need an ack routine that does something different than the eoi... and if it always does the same thing, why not just call eoi ?
Ben.
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