[PATCH] bus: sunxi-rsb: Fix error handling in sunxi_rsb_init()

[Yuan Can]

The sunxi_rsb_init() returns the platform_driver_register() directly
without checking its return value, if platform_driver_register() failed,
the sunxi_rsb_bus is not unregistered.
Fix by unregister sunxi_rsb_bus when platform_driver_register() failed.

Fixes: d787dcdb9c8f ("bus: sunxi-rsb: Add driver for Allwinner Reduced Serial Bus")
Signed-off-by: Yuan Can <yuancan at huawei.com>
---
 drivers/bus/sunxi-rsb.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/bus/sunxi-rsb.c b/drivers/bus/sunxi-rsb.c
index 4cd2e127946e..87b10011667c 100644
--- a/drivers/bus/sunxi-rsb.c
+++ b/drivers/bus/sunxi-rsb.c
@@ -853,7 +853,13 @@ static int __init sunxi_rsb_init(void)
 		return ret;
 	}
 
-	return platform_driver_register(&sunxi_rsb_driver);
+	ret = platform_driver_register(&sunxi_rsb_driver);
+	if (ret) {
+		bus_unregister(&sunxi_rsb_bus);
+		return ret;
+	}
+
+	return 0;
 }
 module_init(sunxi_rsb_init);
 
-- 
2.17.1