linux-kernel - [PATCH] clk: imx: imx6q: Fix device node reference leak in pll6

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Message-Id: <20260130-clk-imx6q-v1-1-2fa4da5dab85@gmail.com>
Date: Fri, 30 Jan 2026 23:56:28 +0800
From: Felix Gu <ustc.gu@...il.com>
To: Abel Vesa <abelvesa@...nel.org>, Peng Fan <peng.fan@....com>, 
 Michael Turquette <mturquette@...libre.com>, 
 Stephen Boyd <sboyd@...nel.org>, Frank Li <Frank.Li@....com>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Lucas Stach <l.stach@...gutronix.de>
Cc: linux-clk@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Felix Gu <ustc.gu@...il.com>
Subject: [PATCH] clk: imx: imx6q: Fix device node reference leak in
 pll6_bypassed()

The function pll6_bypassed() calls of_parse_phandle_with_args()
but never calls of_node_put() to release the reference, causing
a memory leak.

Fix this by adding proper cleanup calls on all exit paths.

Fixes: 3cc48976e9763 ("clk: imx6q: handle ENET PLL bypass")
Signed-off-by: Felix Gu <ustc.gu@...il.com>
---
 drivers/clk/imx/clk-imx6q.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/imx/clk-imx6q.c b/drivers/clk/imx/clk-imx6q.c
index bf4c1d9c9928..1d8e8f0891a3 100644
--- a/drivers/clk/imx/clk-imx6q.c
+++ b/drivers/clk/imx/clk-imx6q.c
@@ -238,8 +238,11 @@ static bool pll6_bypassed(struct device_node *node)
 			return false;
 
 		if (clkspec.np == node &&
-		    clkspec.args[0] == IMX6QDL_PLL6_BYPASS)
+		    clkspec.args[0] == IMX6QDL_PLL6_BYPASS) {
+			of_node_put(clkspec.np);
 			break;
+		}
+		of_node_put(clkspec.np);
 	}
 
 	/* PLL6 bypass is not part of the assigned clock list */
@@ -249,6 +252,7 @@ static bool pll6_bypassed(struct device_node *node)
 	ret = of_parse_phandle_with_args(node, "assigned-clock-parents",
 					 "#clock-cells", index, &clkspec);
 
+	of_node_put(clkspec.np);
 	if (clkspec.args[0] != IMX6QDL_CLK_PLL6)
 		return true;
 

---
base-commit: 33a647c659ffa5bdb94abc345c8c86768ff96215
change-id: 20260130-clk-imx6q-9c4b8835fc26

Best regards,
-- 
Felix Gu <ustc.gu@...il.com>