From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Date: Tue, 31 Oct 2017 16:21:35 +0200
Subject: i2c: Make i2c_unregister_device() NULL-aware

Git-commit: 7b43dd19c9b13a3f5478b9d88a49a5495399ad29
Patch-mainline: v4.15-rc1
References: bsc#1108193 bsc#1133311

It's a common pattern to be NULL-aware when freeing resources.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Mian Yousaf Kaukab <yousaf.kaukab@suse.com>
---
 drivers/i2c/i2c-core.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index d008847..5906c8d 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1432,6 +1432,8 @@ EXPORT_SYMBOL_GPL(i2c_new_device);
  */
 void i2c_unregister_device(struct i2c_client *client)
 {
+	if (!client)
+		return;
 	if (client->dev.of_node)
 		of_node_clear_flag(client->dev.of_node, OF_POPULATED);
 	if (ACPI_COMPANION(&client->dev))
@@ -2245,8 +2247,7 @@ static int __unregister_client(struct device *dev, void *dummy)
 static int __unregister_dummy(struct device *dev, void *dummy)
 {
 	struct i2c_client *client = i2c_verify_client(dev);
-	if (client)
-		i2c_unregister_device(client);
+	i2c_unregister_device(client);
 	return 0;
 }
 
-- 
2.16.3