linux-kernel - [PATCH] usb: host: Fix refcount leak in ehci_hcd_ppc_of

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Message-Id: <20220602110849.58549-1-linmq006@gmail.com>
Date:   Thu,  2 Jun 2022 15:08:49 +0400
From:   Miaoqian Lin <linmq006@...il.com>
To:     Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Vitaly Bordug <vitb@...nel.crashing.org>,
        Stefan Roese <sr@...x.de>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     linmq006@...il.com
Subject: [PATCH] usb: host: Fix refcount leak in ehci_hcd_ppc_of_probe

of_find_compatible_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

Fixes: 796bcae7361c ("USB: powerpc: Workaround for the PPC440EPX USBH_23 errata [take 3]")
Signed-off-by: Miaoqian Lin <linmq006@...il.com>
---
 drivers/usb/host/ehci-ppc-of.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/usb/host/ehci-ppc-of.c b/drivers/usb/host/ehci-ppc-of.c
index 6bbaee74f7e7..28a19693c19f 100644
--- a/drivers/usb/host/ehci-ppc-of.c
+++ b/drivers/usb/host/ehci-ppc-of.c
@@ -148,6 +148,7 @@ static int ehci_hcd_ppc_of_probe(struct platform_device *op)
 		} else {
 			ehci->has_amcc_usb23 = 1;
 		}
+		of_node_put(np);
 	}
 
 	if (of_get_property(dn, "big-endian", NULL)) {
-- 
2.25.1