diff options
| author |   Yangtao Li <frank@allwinnertech.com> | 2020-11-10 14:24:40 +0800 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2020-11-24 09:41:29 +0100 |
| commit | a1158e36f876f6269978a4176e3a1d48d27fe7a1 (patch) | |
| tree | 97957c654059e6fabccec49c38ceb211be2b1d38 /drivers/pinctrl | |
| parent | pinctrl: sunxi: Mark the irq bank not found in sunxi_pinctrl_irq_handler() with WARN_ON (diff) | |
| download | linux-dev-a1158e36f876f6269978a4176e3a1d48d27fe7a1.tar.xz linux-dev-a1158e36f876f6269978a4176e3a1d48d27fe7a1.zip | |
pinctrl: sunxi: Always call chained_irq_{enter, exit} in sunxi_pinctrl_irq_handler
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().
Signed-off-by: Yangtao Li <frank@allwinnertech.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/85263ce8b058e80cea25c6ad6383eb256ce96cc8.1604988979.git.frank@allwinnertech.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/pinctrl')
| -rw-r--r-- | drivers/pinctrl/sunxi/pinctrl-sunxi.c | 6 |
1 files 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, |