diff mbox series

[4.14,15/77] gpio: tegra: mask GPIO IRQs during IRQ shutdown

Message ID 20200601174019.217567368@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH June 1, 2020, 5:53 p.m. UTC 
From: Stephen Warren <swarren@nvidia.com>

[ Upstream commit 0cf253eed5d2bdf7bb3152457b38f39b012955f7 ]

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>
---
 drivers/gpio/gpio-tegra.c | 1 +
 1 file changed, 1 insertion(+)
diff mbox series

Patch

diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c
index 1eb857e2f62f..dd801f5d5253 100644
--- a/drivers/gpio/gpio-tegra.c
+++ b/drivers/gpio/gpio-tegra.c
@@ -356,6 +356,7 @@  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);
 }