From 99399f40d896077ec175d42722d37e625056707e Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Wed, 22 Aug 2018 22:41:06 +0200 Subject: [PATCH] gpio: ep93xx: Properly call the chained IRQ handler The chained irq handler should call chained_irq_enter() and chained_irq_exit() before/after handling the chained IRQ. Acked-by: Alexander Sverdlin Signed-off-by: Linus Walleij --- drivers/gpio/gpio-ep93xx.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c index a81d1e796912..ce7e88df9cc5 100644 --- a/drivers/gpio/gpio-ep93xx.c +++ b/drivers/gpio/gpio-ep93xx.c @@ -88,9 +88,12 @@ static void ep93xx_gpio_ab_irq_handler(struct irq_desc *desc) { struct gpio_chip *gc = irq_desc_get_handler_data(desc); struct ep93xx_gpio *epg = gpiochip_get_data(gc); + struct irq_chip *irqchip = irq_desc_get_chip(desc); unsigned char status; int i; + chained_irq_enter(irqchip, desc); + status = readb(epg->base + EP93XX_GPIO_A_INT_STATUS); for (i = 0; i < 8; i++) { if (status & (1 << i)) { @@ -106,6 +109,8 @@ static void ep93xx_gpio_ab_irq_handler(struct irq_desc *desc) generic_handle_irq(gpio_irq); } } + + chained_irq_exit(irqchip, desc); } static void ep93xx_gpio_f_irq_handler(struct irq_desc *desc) @@ -115,11 +120,14 @@ static void ep93xx_gpio_f_irq_handler(struct irq_desc *desc) * * IRQ_EP93XX_GPIO{0..7}MUX -> gpio_to_irq(EP93XX_GPIO_LINE_F({0..7}) */ + struct irq_chip *irqchip = irq_desc_get_chip(desc); unsigned int irq = irq_desc_get_irq(desc); int port_f_idx = ((irq + 1) & 7) ^ 4; /* {19..22,47..50} -> {0..7} */ int gpio_irq = gpio_to_irq(16) + port_f_idx; + chained_irq_enter(irqchip, desc); generic_handle_irq(gpio_irq); + chained_irq_exit(irqchip, desc); } static void ep93xx_gpio_irq_ack(struct irq_data *d)