bus: sunxi-rsb: Fix the return value of sunxi_rsb_device_create()

stable inclusion
from stable-v5.10.114
commit 8dacbef4fe5851e2f8bf342e0b95ed8b2fe6edd7
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5IY1V

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=8dacbef4fe5851e2f8bf342e0b95ed8b2fe6edd7

--------------------------------

[ Upstream commit fff8c103 ]

This code is really spurious.
It always returns an ERR_PTR, even when err is known to be 0 and calls
put_device() after a successful device_register() call.

It is likely that the return statement in the normal path is missing.
Add 'return rdev;' to fix it.

Fixes: d787dcdb ("bus: sunxi-rsb: Add driver for Allwinner Reduced Serial Bus")
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: NSamuel Holland <samuel@sholland.org>
Tested-by: NSamuel Holland <samuel@sholland.org>
Signed-off-by: NJernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/ef2b9576350bba4c8e05e669e9535e9e2a415763.1650551719.git.christophe.jaillet@wanadoo.frSigned-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/bus/sunxi-rsb.c

@@ -224,6 +224,8 @@ static struct sunxi_rsb_device *sunxi_rsb_device_create(struct sunxi_rsb *rsb,
 
 	dev_dbg(&rdev->dev, "device %s registered\n", dev_name(&rdev->dev));
 
+	return rdev;
+
 err_device_add:
 	put_device(&rdev->dev);