staging: fieldbus: make controller_class constant

Now that the driver core allows for struct class to be in read-only
memory, making all 'class' structures to be declared at build time
placing them into read-only memory, instead of having to be dynamically
allocated at load time.

Cc: Sven Van Asbroeck <TheSven73@gmail.com>
Link: https://lore.kernel.org/r/2023100552-entrench-dingbat-093a@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/fieldbus/anybuss/arcx-anybus.c b/drivers/staging/fieldbus/anybuss/arcx-anybus.c
index 6f69758a8b271357f8260694d5225588156905be..34d18b09beddcb951bf86047b6e6d9a2e9238f90 100644 (file)
--- a/drivers/staging/fieldbus/anybuss/arcx-anybus.c
+++ b/drivers/staging/fieldbus/anybuss/arcx-anybus.c
@@ -218,7 +218,10 @@ static const struct regulator_desc can_power_desc = {
        .ops = &can_power_ops,
 };
 
-static struct class *controller_class;
+static const struct class controller_class = {
+       .name = "arcx_anybus_controller",
+};
+
 static DEFINE_IDA(controller_index_ida);
 
 static int controller_probe(struct platform_device *pdev)
@@ -301,7 +304,7 @@ static int controller_probe(struct platform_device *pdev)
                err = -ENOMEM;
                goto out_ida;
        }
-       cd->class_dev->class = controller_class;
+       cd->class_dev->class = &controller_class;
        cd->class_dev->groups = controller_attribute_groups;
        cd->class_dev->parent = dev;
        cd->class_dev->id = id;
@@ -351,12 +354,12 @@ static int __init controller_init(void)
 {
        int err;
 
-       controller_class = class_create("arcx_anybus_controller");
-       if (IS_ERR(controller_class))
-               return PTR_ERR(controller_class);
+       err = class_register(&controller_class);
+       if (err)
+               return err;
        err = platform_driver_register(&controller_driver);
        if (err)
-               class_destroy(controller_class);
+               class_unregister(&controller_class);
 
        return err;
 }
@@ -364,7 +367,7 @@ static int __init controller_init(void)
 static void __exit controller_exit(void)
 {
        platform_driver_unregister(&controller_driver);
-       class_destroy(controller_class);
+       class_unregister(&controller_class);
        ida_destroy(&controller_index_ida);
 }