linux-kernel - [PATCH] pinctrl: st: Fix irqmux handler

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Date:	Fri, 20 Jun 2014 13:34:54 +0200
From:	Maxime COQUELIN <maxime.coquelin@...com>
To:	Linus Walleij <linus.walleij@...aro.org>,
	Srinivas Kandagatla <srinivas.kandagatla@...aro.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc:	kernel@...inux.com, patrice.chotard@...com, maxime.coquelin@...com
Subject: [PATCH] pinctrl: st: Fix irqmux handler

st_gpio_irqmux_handler() reads the status register to find out
which banks inside the controller have pending IRQs.
For each banks having pending IRQs, it calls the corresponding handler.

Problem is that current code restricts the number of possible banks inside the
controller to ST_GPIO_PINS_PER_BANK. This define represents the number of pins
inside a bank, so it shouldn't be used here.

On STiH407, PIO_FRONT0 controller has 10 banks, so IRQs pending in the two
last banks (PIO18 & PIO19) aren't handled.

This patch replace ST_GPIO_PINS_PER_BANK by the number of banks inside the
controller.

Cc: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: <stable@...r.kernel.org> #v3.15+
Signed-off-by: Maxime Coquelin <maxime.coquelin@...com>
---
 drivers/pinctrl/pinctrl-st.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c
index 1bd6363bc9..9f43916 100644
--- a/drivers/pinctrl/pinctrl-st.c
+++ b/drivers/pinctrl/pinctrl-st.c
@@ -1431,7 +1431,7 @@ static void st_gpio_irqmux_handler(unsigned irq, struct irq_desc *desc)
 
 	status = readl(info->irqmux_base);
 
-	for_each_set_bit(n, &status, ST_GPIO_PINS_PER_BANK)
+	for_each_set_bit(n, &status, info->nbanks)
 		__gpio_irq_handler(&info->banks[n]);
 
 	chained_irq_exit(chip, desc);
-- 
1.9.1

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