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gpio: tegra: mask GPIO IRQs during IRQ shutdown 

[ Upstream commit 0cf253eed5 ]

The driver currently leaves GPIO IRQs unmasked even when the GPIO IRQ
client has released the GPIO IRQ. This allows the HW to raise IRQs, and
SW to process them, after shutdown. Fix this by masking the IRQ when it's
shut down. This is usually taken care of by the irqchip core, but since
this driver has a custom irq_shutdown implementation, it must do this
explicitly itself.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Link: https://lore.kernel.org/r/20200427232605.11608-1-swarren@wwwdotorg.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Stephen Warren 2020-04-27 17:26:05 -06:00 committed by Greg Kroah-Hartman
parent 6ff411af06
commit 3e4e413c93
1 changed files with 1 additions and 0 deletions
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drivers/gpio/gpio-tegra.c
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@ -365,6 +365,7 @@ static void tegra_gpio_irq_shutdown(struct irq_data *d)
struct tegra_gpio_info *tgi = bank->tgi;
unsigned int gpio = d->hwirq;
tegra_gpio_irq_mask(d);
gpiochip_unlock_as_irq(&tgi->gc, gpio);
}