linux-kernel - [PATCH 4.4 21/28] extcon: Fix error handling in extcon_dev

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Message-Id: <20210405085017.689281962@linuxfoundation.org>
Date:   Mon,  5 Apr 2021 10:53:55 +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, Dinghao Liu <dinghao.liu@....edu.cn>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 4.4 21/28] extcon: Fix error handling in extcon_dev_register

From: Dinghao Liu <dinghao.liu@....edu.cn>

[ Upstream commit d3bdd1c3140724967ca4136755538fa7c05c2b4e ]

When devm_kcalloc() fails, we should execute device_unregister()
to unregister edev->dev from system.

Fixes: 046050f6e623e ("extcon: Update the prototype of extcon_register_notifier() with enum extcon")
Signed-off-by: Dinghao Liu <dinghao.liu@....edu.cn>
Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/extcon/extcon.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 21a123cadf78..e7fef10bd12c 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -932,6 +932,7 @@ int extcon_dev_register(struct extcon_dev *edev)
 			sizeof(*edev->nh) * edev->max_supported, GFP_KERNEL);
 	if (!edev->nh) {
 		ret = -ENOMEM;
+		device_unregister(&edev->dev);
 		goto err_dev;
 	}
 
-- 
2.30.2