linux-kernel - [PATCH -next v2 1/3] driver core: add error handling for devtmpfs_create

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Date:   Fri, 10 Feb 2023 09:54:42 +0000
From:   Longlong Xia <xialonglong1@...wei.com>
To:     <gregkh@...uxfoundation.org>
CC:     <chenwandun@...wei.com>, <linux-kernel@...r.kernel.org>,
        <rafael@...nel.org>, <sunnanyong@...wei.com>,
        <wangkefeng.wang@...wei.com>, <xialonglong1@...wei.com>
Subject: [PATCH -next v2 1/3] driver core: add error handling for devtmpfs_create_node()

In some cases, devtmpfs_create_node() can return error value.
So, make use of it.

Signed-off-by: Longlong Xia <xialonglong1@...wei.com>
---
 drivers/base/core.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index 7dab705f2937..aaa3088e5456 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -3405,7 +3405,9 @@ int device_add(struct device *dev)
 		if (error)
 			goto SysEntryError;
 
-		devtmpfs_create_node(dev);
+		error = devtmpfs_create_node(dev);
+		if (error)
+			goto DevtmpfsError;
 	}
 
 	/* Notify clients of device addition.  This call must come
@@ -3461,6 +3463,8 @@ int device_add(struct device *dev)
 done:
 	put_device(dev);
 	return error;
+ DevtmpfsError:
+	device_remove_sys_dev_entry(dev);
  SysEntryError:
 	if (MAJOR(dev->devt))
 		device_remove_file(dev, &dev_attr_dev);
-- 
2.25.1