pinctrl: sirf: add lost chained_irq_enter and exit in sirfsoc_gpio_handle_irq
This patch fixes the chained irq hang issue, tested by DM9000 driver using GPIO0-3(irqnr=131) as the external IRQ on SiRFmarco: $ cat /proc/interrupts CPU0 CPU1 32: 1608 0 GIC sirfsoc_timer0 33: 0 3197 GIC sirfsoc_timer1 50: 10207 0 GIC sirfsoc-uart 56: 2 0 GIC cc0e0000.i2c 70: 44 0 GIC mmc0 131: 333 0 sirf-gpio-irq eth0 ... Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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@ -24,6 +24,7 @@
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#include <linux/bitops.h>
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#include <linux/gpio.h>
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#include <linux/of_gpio.h>
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#include <asm/mach/irq.h>
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#define DRIVER_NAME "pinmux-sirf"
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@ -1427,6 +1428,9 @@ static void sirfsoc_gpio_handle_irq(unsigned int irq, struct irq_desc *desc)
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u32 status, ctrl;
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int idx = 0;
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unsigned int first_irq;
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struct irq_chip *chip = irq_get_chip(irq);
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chained_irq_enter(chip, desc);
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status = readl(bank->chip.regs + SIRFSOC_GPIO_INT_STATUS(bank->id));
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if (!status) {
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@ -1455,6 +1459,8 @@ static void sirfsoc_gpio_handle_irq(unsigned int irq, struct irq_desc *desc)
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idx++;
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status = status >> 1;
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}
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chained_irq_exit(chip, desc);
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}
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static inline void sirfsoc_gpio_set_input(struct sirfsoc_gpio_bank *bank, unsigned ctrl_offset)
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