netdev - [PATCH] net: ethernet: mscc: ocelot_board: Add of_node

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Date:   Tue, 16 Jul 2019 11:22:19 +0530
From:   Nishka Dasgupta <nishkadg.linux@...il.com>
To:     alexandre.belloni@...tlin.com, unglinuxdriver@...rochip.com,
        davem@...emloft.net, netdev@...r.kernel.org
Cc:     Nishka Dasgupta <nishkadg.linux@...il.com>
Subject: [PATCH] net: ethernet: mscc: ocelot_board: Add of_node_put() before return

Each iteration of for_each_available_child_of_node puts the previous
node, but in the case of a return from the middle of the loop, there is
no put, thus causing a memory leak. Hence add an of_node_put before the
return in two places.
Issue found with Coccinelle.

Signed-off-by: Nishka Dasgupta <nishkadg.linux@...il.com>
---
 drivers/net/ethernet/mscc/ocelot_board.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/mscc/ocelot_board.c b/drivers/net/ethernet/mscc/ocelot_board.c
index 58bde1a9eacb..2451d4a96490 100644
--- a/drivers/net/ethernet/mscc/ocelot_board.c
+++ b/drivers/net/ethernet/mscc/ocelot_board.c
@@ -291,8 +291,10 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
 			continue;
 
 		err = ocelot_probe_port(ocelot, port, regs, phy);
-		if (err)
+		if (err) {
+			of_node_put(portnp);
 			return err;
+		}
 
 		phy_mode = of_get_phy_mode(portnp);
 		if (phy_mode < 0)
@@ -318,6 +320,7 @@ static int mscc_ocelot_probe(struct platform_device *pdev)
 			dev_err(ocelot->dev,
 				"invalid phy mode for port%d, (Q)SGMII only\n",
 				port);
+			of_node_put(portnp);
 			return -EINVAL;
 		}
 
-- 
2.19.1