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Merge branch 'linux-2.6' into for-2.6.24
[safe/jmp/linux-2.6]
/
arch
/
powerpc
/
sysdev
/
uic.c
diff --git
a/arch/powerpc/sysdev/uic.c
b/arch/powerpc/sysdev/uic.c
index
22c219e
..
47180b3
100644
(file)
--- a/
arch/powerpc/sysdev/uic.c
+++ b/
arch/powerpc/sysdev/uic.c
@@
-266,6
+266,9
@@
irqreturn_t uic_cascade(int virq, void *data)
int subvirq;
msr = mfdcr(uic->dcrbase + UIC_MSR);
+ if (!msr) /* spurious interrupt */
+ return IRQ_HANDLED;
+
src = 32 - ffs(msr);
subvirq = irq_linear_revmap(uic->irqhost, src);