linux-kernel - [PATCH 5.11 078/210] thunderbolt: Fix a leak in tb_retimer

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Message-Id: <20210412084018.615202728@linuxfoundation.org>
Date:   Mon, 12 Apr 2021 10:39:43 +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, Dan Carpenter <dan.carpenter@...cle.com>,
        Jason Gunthorpe <jgg@...dia.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Subject: [PATCH 5.11 078/210] thunderbolt: Fix a leak in tb_retimer_add()

From: Dan Carpenter <dan.carpenter@...cle.com>

commit bec4d7c93afc07dd0454ae41c559513f858cfb83 upstream.

After the device_register() succeeds, then the correct way to clean up
is to call device_unregister().  The unregister calls both device_del()
and device_put().  Since this code was only device_del() it results in
a memory leak.

Fixes: dacb12877d92 ("thunderbolt: Add support for on-board retimers")
Cc: stable@...r.kernel.org
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/thunderbolt/retimer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/thunderbolt/retimer.c
+++ b/drivers/thunderbolt/retimer.c
@@ -347,7 +347,7 @@ static int tb_retimer_add(struct tb_port
 	ret = tb_retimer_nvm_add(rt);
 	if (ret) {
 		dev_err(&rt->dev, "failed to add NVM devices: %d\n", ret);
-		device_del(&rt->dev);
+		device_unregister(&rt->dev);
 		return ret;
 	}