linux-kernel - [PATCH 5.4 59/84] bus: sunxi-rsb: Fix the return value of sunxi_rsb_device

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Date:   Wed,  4 May 2022 18:44:40 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Samuel Holland <samuel@...lland.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.4 59/84] bus: sunxi-rsb: Fix the return value of sunxi_rsb_device_create()

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>

[ Upstream commit fff8c10368e64e7f8960f149375c12ca5f3b30af ]

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: d787dcdb9c8f ("bus: sunxi-rsb: Add driver for Allwinner Reduced Serial Bus")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Reviewed-by: Samuel Holland <samuel@...lland.org>
Tested-by: Samuel Holland <samuel@...lland.org>
Signed-off-by: Jernej Skrabec <jernej.skrabec@...il.com>
Link: https://lore.kernel.org/r/ef2b9576350bba4c8e05e669e9535e9e2a415763.1650551719.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/bus/sunxi-rsb.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/bus/sunxi-rsb.c b/drivers/bus/sunxi-rsb.c
index 1bb00a959c67..9b1a5e62417c 100644
--- a/drivers/bus/sunxi-rsb.c
+++ b/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);
 
-- 
2.35.1