]> err.no Git - linux-2.6/commit
[POWERPC] Improve robustness of the UIC cascade handler
authorDavid Gibson <david@gibson.dropbear.id.au>
Tue, 14 Aug 2007 03:52:42 +0000 (13:52 +1000)
committerPaul Mackerras <paulus@samba.org>
Fri, 17 Aug 2007 01:02:06 +0000 (11:02 +1000)
commit553fdff633b1cb8cfccf554768444c5580a8d7f7
tree6d87847e2ee77bb60ada7c3dee2158af93352a7b
parent868afce21fdadcecc7bde9263321065948508c56
[POWERPC] Improve robustness of the UIC cascade handler

At present the cascade interrupt handler for the UIC (interrupt
controller on 4xx embedded chips) will misbehave badly if it is called
spuriously - that is if the handler is invoked when no interrupts are
asserted in the child UIC.

Although spurious interrupts shouldn't happen, it's good to behave
robustly if they do.  This patch does so by checking for and ignoring
spurious interrupts.

Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
arch/powerpc/sysdev/uic.c