1 files changed, 49 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-3.13/171-2-pinctrl-sunxi-fix-hang-on-gpio-irq.patch b/target/linux/sunxi/patches-3.13/171-2-pinctrl-sunxi-fix-hang-on-gpio-irq.patch
new file mode 100644
index 0000000000..84710c6328
--- /dev/null
+++ b/target/linux/sunxi/patches-3.13/171-2-pinctrl-sunxi-fix-hang-on-gpio-irq.patch
@@ -0,0 +1,49 @@
+From 613c8489f6b576166aa31d32cbd573f6b7952e06 Mon Sep 17 00:00:00 2001
+From: Hans de Goede <hdegoede@redhat.com>
+Date: Sat, 15 Feb 2014 12:58:17 +0100
+Subject: [PATCH] pinctrl-sunxi: Fix hang on gpio irq
+
+Our irq handler was missing chained_irq_enter / exit calls, causing a
+hard hang as soon as a gpio irq happened.
+
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/pinctrl/pinctrl-sunxi.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/drivers/pinctrl/pinctrl-sunxi.c b/drivers/pinctrl/pinctrl-sunxi.c
+index 74635cc..cc9bd1b 100644
+--- a/drivers/pinctrl/pinctrl-sunxi.c
++++ b/drivers/pinctrl/pinctrl-sunxi.c
+@@ -13,6 +13,7 @@
+ #include <linux/io.h>
+ #include <linux/clk.h>
+ #include <linux/gpio.h>
++#include <linux/irqchip/chained_irq.h>
+ #include <linux/irqdomain.h>
+ #include <linux/module.h>
+ #include <linux/of.h>
+@@ -665,9 +666,12 @@ static void sunxi_pinctrl_irq_unmask(struct irq_data *d)
+ 
+ static void sunxi_pinctrl_irq_handler(unsigned irq, struct irq_desc *desc)
+ {
++	struct irq_chip *chip = irq_get_chip(irq);
+ 	struct sunxi_pinctrl *pctl = irq_get_handler_data(irq);
+ 	const unsigned long reg = readl(pctl->membase + IRQ_STATUS_REG);
+ 
++	chained_irq_enter(chip, desc);
++
+ 	/* Clear all interrupts */
+ 	writel(reg, pctl->membase + IRQ_STATUS_REG);
+ 
+@@ -679,6 +683,7 @@ static void sunxi_pinctrl_irq_handler(unsigned irq, struct irq_desc *desc)
+ 			generic_handle_irq(pin_irq);
+ 		}
+ 	}
++	chained_irq_exit(chip, desc);
+ }
+ 
+ static struct of_device_id sunxi_pinctrl_match[] = {
+-- 
+1.8.5.5
+