[PATCH] ppc64 iSeries: fix for generic irq changes

The generic irq patches broke pci irqs on ppc64 iSeries.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

arch/ppc64/kernel/iSeries_irq.c

@@ -110,6 +110,7 @@ static unsigned int iSeries_startup_IRQ(unsigned int irq)
 	/* Unmask bridge interrupts in the FISR */
 	mask = 0x01010000 << function;
 	HvCallPci_unmaskFisr(bus, subBus, deviceId, mask);
+	iSeries_enable_IRQ(irq);
 	return 0;
 }