On Fri, Apr 04, 2008 at 08:50:36AM +1100, Benjamin Herrenschmidt wrote: > > On Thu, 2008-04-03 at 23:09 +0400, Valentine Barshak wrote: > > We really need to ack interrupts at mpic_teardown, since > > not all platforms reset mpic at kernel start-up. For example, > > kexec'ed kernel hangs on P.A. Semi if mpic_eoi() isn't called. > > > > Signed-off-by: Valentine Barshak <[EMAIL PROTECTED]> > > --- > > Would be interesting to find out why it hangs tho... it shouldn't .
I haven't reproduced the problem and looked at hardware state yet, but I would expect it to be because the openpic won't send another interrupt until the previous is EOI'd, and the IPI is never EOI'd as far as I can tell. The XICS code does it explicitly already. I'm surprised it doesn't break on the 970-based platforms actually... -Olof _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
