ARM: it8152: ipipe: enable interrupt pipelining

arch/arm/common/it8152.c

@@ -26,6 +26,7 @@
 #include <linux/irq.h>
 #include <linux/io.h>
 #include <linux/export.h>
+#include <linux/ipipe.h>
 
 #include <asm/mach/pci.h>
 #include <asm/hardware/it8152.h>
@@ -75,6 +76,7 @@ static struct irq_chip it8152_irq_chip = {
 	.irq_ack	= it8152_mask_irq,
 	.irq_mask	= it8152_mask_irq,
 	.irq_unmask	= it8152_unmask_irq,
+	.flags		= IRQCHIP_PIPELINE_SAFE,
 };
 
 void it8152_init_irq(void)
@@ -124,21 +126,21 @@ void it8152_irq_demux(struct irq_desc *desc)
 	       bits_pd &= ((1 << IT8152_PD_IRQ_COUNT) - 1);
 	       while (bits_pd) {
 		       i = __ffs(bits_pd);
-		       generic_handle_irq(IT8152_PD_IRQ(i));
+		       ipipe_handle_demuxed_irq(IT8152_PD_IRQ(i));
 		       bits_pd &= ~(1 << i);
 	       }
 
 	       bits_lp &= ((1 << IT8152_LP_IRQ_COUNT) - 1);
 	       while (bits_lp) {
 		       i = __ffs(bits_lp);
-		       generic_handle_irq(IT8152_LP_IRQ(i));
+		       ipipe_handle_demuxed_irq(IT8152_LP_IRQ(i));
 		       bits_lp &= ~(1 << i);
 	       }
 
 	       bits_ld &= ((1 << IT8152_LD_IRQ_COUNT) - 1);
 	       while (bits_ld) {
 		       i = __ffs(bits_ld);
-		       generic_handle_irq(IT8152_LD_IRQ(i));
+		       ipipe_handle_demuxed_irq(IT8152_LD_IRQ(i));
 		       bits_ld &= ~(1 << i);
 	       }
        }