[POWERPC] Use the genirq framework

This adapts the generic powerpc interrupt handling code, and all of
the platforms except for the embedded 6xx machines, to use the new
genirq framework.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 16 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/chrp/setup.c b/arch/powerpc/platforms/chrp/setup.c
index 1f1771b212b4..a5dffc8d93a9 100644
--- a/arch/powerpc/platforms/chrp/setup.c
+++ b/arch/powerpc/platforms/chrp/setup.c
@@ -315,6 +315,21 @@ chrp_event_scan(unsigned long unused)
                   jiffies + event_scan_interval);
 }
 
+void chrp_8259_cascade(unsigned int irq, struct irq_desc *desc,
+                        struct pt_regs *regs)
+{
+        unsigned int max = 100;
+
+        while(max--) {
+                int irq = i8259_irq(regs);
+                if (max == 99)
+                        desc->chip->eoi(irq);
+                if (irq < 0)
+                        break;
+                generic_handle_irq(irq, regs);
+        };
+}
+
 /*
  * Finds the open-pic node and sets up the mpic driver.
  */
@@ -402,7 +417,7 @@ static void __init chrp_find_openpic(void)
         }
 
         mpic_init(chrp_mpic);
-        mpic_setup_cascade(NUM_ISA_INTERRUPTS, i8259_irq_cascade, NULL);
+        set_irq_chained_handler(NUM_ISA_INTERRUPTS, chrp_8259_cascade);
 }
 
 #if defined(CONFIG_VT) && defined(CONFIG_INPUT_ADBHID) && defined(XMON)