[PATCH] pmdomain: core: switch to dynamic root device

[Johan Hovold <johan@kernel.org>]

Driver core expects devices to be dynamically allocated and will, for
example, complain loudly if a device that lacks a release function is
ever freed.

Use root_device_register() to allocate and register the root device
instead of open coding using a static device.

Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/pmdomain/core.c | 16 ++++++----------
 1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 4d32fc676aaf..e01884f2d7b7 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -33,9 +33,7 @@ static const struct bus_type genpd_provider_bus_type = {
 };
 
 /* The parent for genpd_provider devices. */
-static struct device genpd_provider_bus = {
-	.init_name = "genpd_provider",
-};
+static struct device *genpd_provider_bus;
 
 #define GENPD_RETRY_MAX_MS	250		/* Approximate */
 
@@ -2325,7 +2323,7 @@ static int genpd_alloc_data(struct generic_pm_domain *genpd)
 	device_initialize(&genpd->dev);
 	genpd->dev.release = genpd_provider_release;
 	genpd->dev.bus = &genpd_provider_bus_type;
-	genpd->dev.parent = &genpd_provider_bus;
+	genpd->dev.parent = genpd_provider_bus;
 
 	if (!genpd_is_dev_name_fw(genpd)) {
 		dev_set_name(&genpd->dev, "%s", genpd->name);
@@ -3567,11 +3565,9 @@ static int __init genpd_bus_init(void)
 {
 	int ret;
 
-	ret = device_register(&genpd_provider_bus);
-	if (ret) {
-		put_device(&genpd_provider_bus);
-		return ret;
-	}
+	genpd_provider_bus = root_device_register("genpd_provider");
+	if (IS_ERR(genpd_provider_bus))
+		return PTR_ERR(genpd_provider_bus);
 
 	ret = bus_register(&genpd_provider_bus_type);
 	if (ret)
@@ -3593,7 +3589,7 @@ static int __init genpd_bus_init(void)
 err_prov_bus:
 	bus_unregister(&genpd_provider_bus_type);
 err_dev:
-	device_unregister(&genpd_provider_bus);
+	root_device_unregister(genpd_provider_bus);
 	return ret;
 }
 core_initcall(genpd_bus_init);
-- 
2.53.0