[PATCH 4/6] gpio: 104-idi-48: Ensure number of irq matches number of base

William Breathitt Gray
2022-08-18T23:12:25Z

The 104-idi-48 module calls devm_request_irq() for each device. If the
number of irq passed to the module does not match the number of base, a
default value of 0 is passed to devm_request_irq(). IRQ 0 is probably
not what the user wants, so utilize the module_isa_driver_with_irq macro
to ensure the number of irq matches the number of base.

Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
drivers/gpio/gpio-104-idi-48.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c
index 40be76efeed7..2b0256eefb70 100644
--- a/drivers/gpio/gpio-104-idi-48.c
+++ b/drivers/gpio/gpio-104-idi-48.c
@@ -34,7 +34,8 @@ module_param_hw_array(base, uint, ioport, &num_idi_48, 0);
MODULE_PARM_DESC(base, "ACCES 104-IDI-48 base addresses");

static unsigned int irq[MAX_NUM_IDI_48];
-module_param_hw_array(irq, uint, irq, NULL, 0);
+static unsigned int num_irq;
+module_param_hw_array(irq, uint, irq, &num_irq, 0);
MODULE_PARM_DESC(irq, "ACCES 104-IDI-48 interrupt line numbers");

/**
@@ -300,7 +301,7 @@ static struct isa_driver idi_48_driver = {
.name = "104-idi-48"
},
};
-module_isa_driver(idi_48_driver, num_idi_48);
+module_isa_driver_with_irq(idi_48_driver, num_idi_48, num_irq);

MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>");
MODULE_DESCRIPTION("ACCES 104-IDI-48 GPIO driver");
--
2.37.2