[PATCH 03/19] pinctrl: sunxi: Always call chained_irq_{enter, exit} in sunxi_pinctrl_irq_handler
From: Frank Lee <hidden>
Date: 2020-11-10 04:06:28
Also in:
dmaengine, linux-devicetree, linux-gpio, linux-mmc, linux-watchdog, lkml, stable
Subsystem:
arm/allwinner sunxi soc support, pin control subsystem, the rest · Maintainers:
Chen-Yu Tsai, Jernej Skrabec, Samuel Holland, Linus Walleij, Linus Torvalds
From: Yangtao Li <redacted> 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 <redacted> --- 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,
--
2.28.0
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