linux-kernel - [PATCH] MFD: dln2: fix memory leak in dln2

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Message-Id: <20230330024353.4503-1-qning0106@126.com>
Date:   Thu, 30 Mar 2023 10:43:53 +0800
From:   Qiang Ning <qning0106@....com>
To:     lee@...nel.org, qning0106@....com
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH] MFD: dln2: fix memory leak in dln2_probe

When dln2_setup_rx_urbs() in dln2_probe() fails, error out_free
forgets to call  usb_put_dev to decrease the refcount of
dln2->usb_dev.

Fix this by adding usb_put_dev() in the error handling code
of dln2_probe().

Signed-off-by: Qiang Ning <qning0106@....com>
---
 drivers/mfd/dln2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/mfd/dln2.c b/drivers/mfd/dln2.c
index 6cd0b0c752d6..c3149729cec2 100644
--- a/drivers/mfd/dln2.c
+++ b/drivers/mfd/dln2.c
@@ -827,6 +827,7 @@ static int dln2_probe(struct usb_interface *interface,
 	dln2_stop_rx_urbs(dln2);
 
 out_free:
+	usb_put_dev(dln2->usb_dev);
 	dln2_free(dln2);
 
 	return ret;
-- 
2.25.1