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-rw-r--r--arch/arm/mach-at91/gpio.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c
index f629c2b..ee4964a 100644
--- a/arch/arm/mach-at91/gpio.c
+++ b/arch/arm/mach-at91/gpio.c
@@ -490,6 +490,11 @@ postcore_initcall(at91_gpio_debugfs_init);
/*--------------------------------------------------------------------------*/
+/* This lock class tells lockdep that GPIO irqs are in a different
+ * category than their parents, so it won't report false recursion.
+ */
+static struct lock_class_key gpio_lock_class;
+
/*
* Called from the processor-specific init to enable GPIO interrupt support.
*/
@@ -510,6 +515,8 @@ void __init at91_gpio_irq_setup(void)
__raw_writel(~0, this->regbase + PIO_IDR);
for (i = 0, pin = this->chipbase; i < 32; i++, pin++) {
+ lockdep_set_class(&irq_desc[pin].lock, &gpio_lock_class);
+
/*
* Can use the "simple" and not "edge" handler since it's
* shorter, and the AIC handles interrupts sanely.