powerpc/psurge: Create a irq_host for secondary cpus

Create a dummy irq_host using the generic dummy irq chip for the secondary
cpus to use.  Create a direct irq mapping for the ipi and register the
ipi action handler against it.  If for some unlikely reason part of this
fails then don't detect the secondary cpus.

This removes another instance of NO_IRQ_IGNORE, records the ipi stats
for the secondary cpus, and runs the ipi on the interrupt stack.

Signed-off-by: Milton Miller <miltonm@bga.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 3 insertions, 6 deletions

diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index b706cb3ad99c..360260d1352d 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -240,12 +240,9 @@ static unsigned int pmac_pic_get_irq(void)
         unsigned long flags;
 
 #ifdef CONFIG_PPC_PMAC32_PSURGE
-        void psurge_smp_message_recv(void);
-
-        /* IPI's are a hack on the powersurge -- Cort */
-        if ( smp_processor_id() != 0 ) {
-                psurge_smp_message_recv();
-                return NO_IRQ_IGNORE;   /* ignore, already handled */
+        /* IPI's are a hack on the powersurge -- Cort */
+        if (smp_processor_id() != 0) {
+                return  psurge_secondary_virq;
         }
 #endif /* CONFIG_PPC_PMAC32_PSURGE */
         raw_spin_lock_irqsave(&pmac_pic_lock, flags);