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From:   Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To:     kishon@ti.com
Cc:     linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Subject: [PATCH v2] phy: renesas: rcar-gen2: Fix memory leak at error paths
Date:   Tue, 28 May 2019 14:04:02 +0900
Message-Id: <1559019842-8874-1-git-send-email-yoshihiro.shimoda.uh@renesas.com>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

This patch fixes memory leak at error paths of the probe function.
In for_each_child_of_node, if the loop returns, the driver should
call of_put_node() before returns.

Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Fixes: 1233f59f745 ("phy: Renesas R-Car Gen2 PHY driver")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
 Changes from v1 (https://patchwork.kernel.org/patch/10831295/):
 - Rebase on renesas-drivers.git / renesas-drivers-2019-05-21-v5.2-rc1 tag.
 - Add Geert-san's Reviewed-by tag.

 drivers/phy/renesas/phy-rcar-gen2.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/phy/renesas/phy-rcar-gen2.c b/drivers/phy/renesas/phy-rcar-gen2.c
index 8dc5710..2926e49 100644
--- a/drivers/phy/renesas/phy-rcar-gen2.c
+++ b/drivers/phy/renesas/phy-rcar-gen2.c
@@ -391,6 +391,7 @@ static int rcar_gen2_phy_probe(struct platform_device *pdev)
 		error = of_property_read_u32(np, "reg", &channel_num);
 		if (error || channel_num > 2) {
 			dev_err(dev, "Invalid \"reg\" property\n");
+			of_node_put(np);
 			return error;
 		}
 		channel->select_mask = select_mask[channel_num];
@@ -406,6 +407,7 @@ static int rcar_gen2_phy_probe(struct platform_device *pdev)
 						   data->gen2_phy_ops);
 			if (IS_ERR(phy->phy)) {
 				dev_err(dev, "Failed to create PHY\n");
+				of_node_put(np);
 				return PTR_ERR(phy->phy);
 			}
 			phy_set_drvdata(phy->phy, phy);
-- 
2.7.4