From: Yangtao Li frank@allwinnertech.com

It is found on many allwinner soc that there is a low probability that the interrupt status cannot be read in sunxi_pinctrl_irq_handler. This will cause the interrupt status of a gpio bank to always be active on gic, preventing gic from responding to other spi interrupts correctly.

So we should call the chained_irq_* each time enter sunxi_pinctrl_irq_handler().

Cc: stable@vger.kernel.org Signed-off-by: Yangtao Li frank@allwinnertech.com --- drivers/pinctrl/sunxi/pinctrl-sunxi.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/sunxi/pinctrl-sunxi.c b/drivers/pinctrl/sunxi/pinctrl-sunxi.c index 9d8b59dafa4b..dc8d39ae045b 100644 --- a/drivers/pinctrl/sunxi/pinctrl-sunxi.c +++ b/drivers/pinctrl/sunxi/pinctrl-sunxi.c @@ -1141,20 +1141,22 @@ static void sunxi_pinctrl_irq_handler(struct irq_desc *desc)

WARN_ON(bank == pctl->desc->irq_banks);

+ chained_irq_enter(chip, desc); + reg = sunxi_irq_status_reg_from_bank(pctl->desc, bank); val = readl(pctl->membase + reg);

if (val) { int irqoffset;

- chained_irq_enter(chip, desc); for_each_set_bit(irqoffset, &val, IRQ_PER_BANK) { int pin_irq = irq_find_mapping(pctl->domain, bank * IRQ_PER_BANK + irqoffset); generic_handle_irq(pin_irq); } - chained_irq_exit(chip, desc); } + + chained_irq_exit(chip, desc); }

static int sunxi_pinctrl_add_function(struct sunxi_pinctrl *pctl,