From: Felix Radensky <felix@embedded-sol.com>
Date: Tue, 11 Oct 2011 08:24:21 +0000 (+0200)
Subject: powerpc/8xxx: Fix interrupt handling in MPC8xxx GPIO driver
X-Git-Tag: firefly_0821_release~3680^2~4178^2~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=cfadd838;p=firefly-linux-kernel-4.4.55.git
powerpc/8xxx: Fix interrupt handling in MPC8xxx GPIO driver
Interrupt handler in MPC8xxx GPIO driver is missing the call to PIC EOI
(end of interrupt) handler. As a result, at least on 85XX systems, GPIO
interrupt is delivered only once. This patch adds the missing EOI call.
Tested on custom P1022 board.
Signed-off-by: Felix Radensky <felix@embedded-sol.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
---
diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c
index d74d19bf3af5..ec3fcf0a7e12 100644
--- a/drivers/gpio/gpio-mpc8xxx.c
+++ b/drivers/gpio/gpio-mpc8xxx.c
@@ -146,6 +146,7 @@ static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
static void mpc8xxx_gpio_irq_cascade(unsigned int irq, struct irq_desc *desc)
{
struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_desc_get_handler_data(desc);
+ struct irq_chip *chip = irq_desc_get_chip(desc);
struct of_mm_gpio_chip *mm = &mpc8xxx_gc->mm_gc;
unsigned int mask;
@@ -153,6 +154,7 @@ static void mpc8xxx_gpio_irq_cascade(unsigned int irq, struct irq_desc *desc)
if (mask)
generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq,
32 - ffs(mask)));
+ chip->irq_eoi(&desc->irq_data);
}
static void mpc8xxx_irq_unmask(struct irq_data *d)