linux-kernel - fsi: use put_device to release resource on error path

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Message-Id: <1555514831-124442-1-git-send-email-bianpan2016@163.com>
Date:   Wed, 17 Apr 2019 23:27:11 +0800
From:   Pan Bian <bianpan2016@....com>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Joel Stanley <joel@....id.au>
Cc:     linux-kernel@...r.kernel.org, Pan Bian <bianpan2016@....com>
Subject: fsi: use put_device to release resource on error path

In the function fsi_slave_init, kfree is used to release slave if error
occurs during set smode. Some fields of slave will not be released.
Resulting in memory leak. Instread, put_device should be used to
correctly release resources.

Fixes: d1dcd6782576("fsi: Add cfam char devices")
Signed-off-by: Pan Bian <bianpan2016@....com>
---
 drivers/fsi/fsi-core.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 2c31563..2bb6625 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -1056,8 +1056,7 @@ static int fsi_slave_init(struct fsi_master *master, int link, uint8_t id)
 		dev_warn(&master->dev,
 				"can't set smode on slave:%02x:%02x %d\n",
 				link, id, rc);
-		kfree(slave);
-		return -ENODEV;
+		goto err_free;
 	}
 	if (master->link_config)
 		master->link_config(master, link,
-- 
2.7.4