gpio: pxa: add chain_eneter and chain_exit for irq handler

Signed-off-by: Chao Xie <xiechao.mail@gmail.com>
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpio/gpio-pxa.c b/drivers/gpio/gpio-pxa.c
index 6d0cb9dff27d..db5c2958f973 100644
--- a/drivers/gpio/gpio-pxa.c
+++ b/drivers/gpio/gpio-pxa.c
@@ -26,6 +26,8 @@
 #include <linux/syscore_ops.h>
 #include <linux/slab.h>
 
+#include <asm/mach/irq.h>
+
 #include <mach/irqs.h>
 
 /*
@@ -331,6 +333,9 @@ static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
         struct pxa_gpio_chip *c;
         int loop, gpio, gpio_base, n;
         unsigned long gedr;
+        struct irq_chip *chip = irq_desc_get_chip(desc);
+
+        chained_irq_enter(chip, desc);
 
         do {
                 loop = 0;
@@ -350,6 +355,8 @@ static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
                         }
                 }
         } while (loop);
+
+        chained_irq_exit(chip, desc);
 }
 
 static void pxa_ack_muxed_gpio(struct irq_data *d)