[PATCH 5.19 36/38] gpio: 104-idio-16: Make irq_chip immutable

Greg Kroah-Hartman
2022-09-16T10:27:52Z

From: William Breathitt Gray <william.gray@linaro.org>

[ Upstream commit 410a5041aa60d91ff66a861560e7c879d664270f ]

Kernel warns about mutable irq_chips:

"not an immutable chip, please consider fixing!"

Make the struct irq_chip const, flag it as IRQCHIP_IMMUTABLE, add the
new helper functions, and call the appropriate gpiolib functions.

Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpio/gpio-104-idio-16.c | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/gpio/gpio-104-idio-16.c b/drivers/gpio/gpio-104-idio-16.c
index 45f7ad8573e19..a8b7c8eafac5a 100644
--- a/drivers/gpio/gpio-104-idio-16.c
+++ b/drivers/gpio/gpio-104-idio-16.c
@@ -150,10 +150,11 @@ static void idio_16_irq_mask(struct irq_data *data)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip);
- const unsigned long mask = BIT(irqd_to_hwirq(data));
+ const unsigned long offset = irqd_to_hwirq(data);
unsigned long flags;

- idio16gpio->irq_mask &= ~mask;
+ idio16gpio->irq_mask &= ~BIT(offset);
+ gpiochip_disable_irq(chip, offset);

if (!idio16gpio->irq_mask) {
raw_spin_lock_irqsave(&idio16gpio->lock, flags);
@@ -168,11 +169,12 @@ static void idio_16_irq_unmask(struct irq_data *data)
{
struct gpio_chip *chip = irq_data_get_irq_chip_data(data);
struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip);
- const unsigned long mask = BIT(irqd_to_hwirq(data));
+ const unsigned long offset = irqd_to_hwirq(data);
const unsigned long prev_irq_mask = idio16gpio->irq_mask;
unsigned long flags;

- idio16gpio->irq_mask |= mask;
+ gpiochip_enable_irq(chip, offset);
+ idio16gpio->irq_mask |= BIT(offset);

if (!prev_irq_mask) {
raw_spin_lock_irqsave(&idio16gpio->lock, flags);
@@ -193,12 +195,14 @@ static int idio_16_irq_set_type(struct irq_data *data, unsigned int flow_type)
return 0;
}

-static struct irq_chip idio_16_irqchip = {
+static const struct irq_chip idio_16_irqchip = {
.name = "104-idio-16",
.irq_ack = idio_16_irq_ack,
.irq_mask = idio_16_irq_mask,
.irq_unmask = idio_16_irq_unmask,
- .irq_set_type = idio_16_irq_set_type
+ .irq_set_type = idio_16_irq_set_type,
+ .flags = IRQCHIP_IMMUTABLE,
+ GPIOCHIP_IRQ_RESOURCE_HELPERS,
};

static irqreturn_t idio_16_irq_handler(int irq, void *dev_id)
@@ -275,7 +279,7 @@ static int idio_16_probe(struct device *dev, unsigned int id)
idio16gpio->out_state = 0xFFFF;

girq = &idio16gpio->chip.irq;
- girq->chip = &idio_16_irqchip;
+ gpio_irq_chip_set_chip(girq, &idio_16_irqchip);
/* This will let us handle the parent IRQ in the driver */
girq->parent_handler = NULL;
girq->num_parents = 0;
--
2.35.1