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From:   William Breathitt Gray <william.gray@linaro.org>
To:     linux-iio@vger.kernel.or, linux-gpio@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, linus.walleij@linaro.org,
        brgl@bgdev.pl, William Breathitt Gray <william.gray@linaro.org>
Subject: [PATCH 3/6] gpio: 104-dio-48e: Ensure number of irq matches number of base
Date:   Thu, 18 Aug 2022 12:28:12 -0400
Message-Id: <8a7db52e7ba040ad3523a15c6f9369e3d1f46a02.1660839809.git.william.gray@linaro.org>
In-Reply-To: <cover.1660839809.git.william.gray@linaro.org>
References: <cover.1660839809.git.william.gray@linaro.org>
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The 104-dio-48e 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-dio-48e.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c
index a41551870759..8b5172802188 100644
--- a/drivers/gpio/gpio-104-dio-48e.c
+++ b/drivers/gpio/gpio-104-dio-48e.c
@@ -34,7 +34,8 @@ module_param_hw_array(base, uint, ioport, &num_dio48e, 0);
 MODULE_PARM_DESC(base, "ACCES 104-DIO-48E base addresses");
 
 static unsigned int irq[MAX_NUM_DIO48E];
-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-DIO-48E interrupt line numbers");
 
 #define DIO48E_NUM_PPI 2
@@ -358,7 +359,7 @@ static struct isa_driver dio48e_driver = {
 		.name = "104-dio-48e"
 	},
 };
-module_isa_driver(dio48e_driver, num_dio48e);
+module_isa_driver_with_irq(dio48e_driver, num_dio48e, num_irq);
 
 MODULE_AUTHOR("William Breathitt Gray <vilhelm.gray@gmail.com>");
 MODULE_DESCRIPTION("ACCES 104-DIO-48E GPIO driver");
-- 
2.37.2