dpaa2-ptp: Fix refcount leak in dpaa2_ptp_probe

stable inclusion
from stable-v5.10.111
commit ebd1e3458dbf6643aa0272da398cb5b537d492b7
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5GL1Z

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=ebd1e3458dbf6643aa0272da398cb5b537d492b7

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

[ Upstream commit 2b04bd4f ]

This node pointer is returned by of_find_compatible_node() with
refcount incremented. Calling of_node_put() to aovid the refcount leak.

Fixes: d346c9e8 ("dpaa2-ptp: reuse ptp_qoriq driver")
Signed-off-by: NMiaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220404125336.13427-1-linmq006@gmail.comSigned-off-by: NPaolo Abeni <pabeni@redhat.com>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: NWei Li <liwei391@huawei.com>

drivers/net/ethernet/freescale/dpaa2/dpaa2-ptp.c

@@ -168,7 +168,7 @@ static int dpaa2_ptp_probe(struct fsl_mc_device *mc_dev)
 	base = of_iomap(node, 0);
 	if (!base) {
 		err = -ENOMEM;
-		goto err_close;
+		goto err_put;
 	}
 
 	err = fsl_mc_allocate_irqs(mc_dev);
@@ -212,6 +212,8 @@ static int dpaa2_ptp_probe(struct fsl_mc_device *mc_dev)
 	fsl_mc_free_irqs(mc_dev);
 err_unmap:
 	iounmap(base);
+err_put:
+	of_node_put(node);
 err_close:
 	dprtc_close(mc_dev->mc_io, 0, mc_dev->mc_handle);
 err_free_mcp: