linux-kernel - [PATCH] hwmon: (corsair-psu) Fix failure to load when built-in to kernel

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Message-ID: <20231208130710.191420-1-savicaleksa83@gmail.com>
Date:   Fri,  8 Dec 2023 14:07:10 +0100
From:   Aleksa Savic <savicaleksa83@...il.com>
To:     linux-hwmon@...r.kernel.org
Cc:     Aleksa Savic <savicaleksa83@...il.com>,
        Wilken Gottwalt <wilken.gottwalt@...teo.net>,
        Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] hwmon: (corsair-psu) Fix failure to load when built-in to kernel

When built-in to the kernel, the corsair-psu driver fails to register with
the following message:

"Driver 'corsair-psu' was unable to register with bus_type 'hid'
because the bus was not initialized."

Fix this by initializing the driver after the HID bus using
late_initcall(), as hwmon is built before HID.

Fixes: d115b51e0e56 ("hwmon: add Corsair PSU HID controller driver")
Signed-off-by: Aleksa Savic <savicaleksa83@...il.com>
---
 drivers/hwmon/corsair-psu.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/hwmon/corsair-psu.c b/drivers/hwmon/corsair-psu.c
index 904890598c11..48831a528965 100644
--- a/drivers/hwmon/corsair-psu.c
+++ b/drivers/hwmon/corsair-psu.c
@@ -899,7 +899,20 @@ static struct hid_driver corsairpsu_driver = {
 	.reset_resume	= corsairpsu_resume,
 #endif
 };
-module_hid_driver(corsairpsu_driver);
+
+static int __init corsairpsu_hid_init(void)
+{
+	return hid_register_driver(&corsairpsu_driver);
+}
+
+static void __exit corsairpsu_hid_exit(void)
+{
+	hid_unregister_driver(&corsairpsu_driver);
+}
+
+/* When compiled into the kernel, initialize after the hid bus */
+late_initcall(corsairpsu_hid_init);
+module_exit(corsairpsu_hid_exit);
 
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Wilken Gottwalt <wilken.gottwalt@...teo.net>");
-- 
2.43.0