usb: host: Fix refcount leak in ehci_hcd_ppc_of_probe

stable inclusion
from stable-v5.10.137
commit 585d22a5624ef2b540c337665c72fea8cd33db50
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I60PLB

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=585d22a5624ef2b540c337665c72fea8cd33db50

--------------------------------

[ Upstream commit b5c5b13c ]

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: 796bcae7 ("USB: powerpc: Workaround for the PPC440EPX USBH_23 errata [take 3]")
Acked-by: NAlan Stern <stern@rowland.harvard.edu>
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220602110849.58549-1-linmq006@gmail.comSigned-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>

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)) {