[PATCH v1] driver core: soc: Unregister bus on early device registration failure

[PATCH v1] driver core: soc: Unregister bus on early device registration failure

[Yuho Choi]

soc_bus_register() registers the SoC bus before registering a deferred
early SoC device. If soc_device_register() fails in that path, the
function returns the error directly and leaves the bus registered.

Store the returned SoC device pointer explicitly so the success and
error cases are handled separately. On failure, clear soc_bus_registered
and unregister the bus before returning the error.

Fixes: 6e12db376b60 ("base: soc: Allow early registration of a single SoC device")
Signed-off-by: Yuho Choi <dbgh9129@gmail.com>
---
 drivers/base/soc.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/drivers/base/soc.c b/drivers/base/soc.c
index 65ce72d49230..af7d71393774 100644
--- a/drivers/base/soc.c
+++ b/drivers/base/soc.c
@@ -191,6 +191,7 @@ EXPORT_SYMBOL_GPL(soc_device_unregister);
 
 static int __init soc_bus_register(void)
 {
+	struct soc_device *soc_dev;
 	int ret;
 
 	ret = bus_register(&soc_bus_type);
@@ -198,10 +199,20 @@ static int __init soc_bus_register(void)
 		return ret;
 	soc_bus_registered = true;
 
-	if (early_soc_dev_attr)
-		return PTR_ERR(soc_device_register(early_soc_dev_attr));
+	if (early_soc_dev_attr) {
+		soc_dev = soc_device_register(early_soc_dev_attr);
+		if (IS_ERR(soc_dev)) {
+			ret = PTR_ERR(soc_dev);
+			goto err_unregister_bus;
+		}
+	}
 
 	return 0;
+
+err_unregister_bus:
+	soc_bus_registered = false;
+	bus_unregister(&soc_bus_type);
+	return ret;
 }
 core_initcall(soc_bus_register);
 
-- 
2.43.0