[RFT PATCH 1/3] gpio: eic-sprd: unregister from the irq notifier on remove()

Bartosz Golaszewski
2023-09-12T09:45:29Z

From: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

This is a tristate module, it can be unloaded. We need to cleanup properly
and unregister from the interrupt notifier on driver detach.

Fixes: b32415652a4d ("gpio: eic-sprd: use atomic notifiers to notify all chips about irqs")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
drivers/gpio/gpio-eic-sprd.c | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-eic-sprd.c b/drivers/gpio/gpio-eic-sprd.c
index 21a1afe358d6..9b2f9ccf8d77 100644
--- a/drivers/gpio/gpio-eic-sprd.c
+++ b/drivers/gpio/gpio-eic-sprd.c
@@ -580,6 +580,14 @@ static const struct irq_chip sprd_eic_irq = {
.flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
GPIOCHIP_IRQ_RESOURCE_HELPERS,
};
+
+static void sprd_eic_unregister_notifier(void *data)
+{
+ struct notifier_block *nb = data;
+
+ atomic_notifier_chain_unregister(&sprd_eic_irq_notifier, nb);
+}
+
static int sprd_eic_probe(struct platform_device *pdev)
{
const struct sprd_eic_variant_data *pdata;
@@ -658,8 +666,15 @@ static int sprd_eic_probe(struct platform_device *pdev)
}

sprd_eic->irq_nb.notifier_call = sprd_eic_irq_notify;
- return atomic_notifier_chain_register(&sprd_eic_irq_notifier,
- &sprd_eic->irq_nb);
+ ret = atomic_notifier_chain_register(&sprd_eic_irq_notifier,
+ &sprd_eic->irq_nb);
+ if (ret)
+ return dev_err_probe(&pdev->dev, ret,
+ "Failed to register with the interrupt notifier");
+
+ return devm_add_action_or_reset(&pdev->dev,
+ sprd_eic_unregister_notifier,
+ &sprd_eic->irq_nb);
}

static const struct of_device_id sprd_eic_of_match[] = {
--
2.39.2