linux-kernel - [PATCH 1/2] thunderbolt: Fix a leak in tb_retimer

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Date:   Mon, 29 Mar 2021 09:07:18 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Andreas Noever <andreas.noever@...il.com>,
        Kranthi Kuntala <kranthi.kuntala@...el.com>
Cc:     Michael Jamet <michael.jamet@...el.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Yehezkel Bernat <YehezkelShB@...il.com>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org, Jason Gunthorpe <jgg@...dia.com>
Subject: [PATCH 1/2] thunderbolt: Fix a leak in tb_retimer_add()

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")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
This is from a new static checker warning.  Not tested.  With new
warnings it's also possible that I have misunderstood something
fundamental so review carefully etc.

 drivers/thunderbolt/retimer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/thunderbolt/retimer.c b/drivers/thunderbolt/retimer.c
index 620bcf586ee2..7a5d61604c8b 100644
--- a/drivers/thunderbolt/retimer.c
+++ b/drivers/thunderbolt/retimer.c
@@ -347,7 +347,7 @@ static int tb_retimer_add(struct tb_port *port, u8 index, u32 auth_status)
 	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;
 	}
 
-- 
2.30.2