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From:   Dario Binacchi <dario.binacchi@amarulasolutions.com>
To:     linux-kernel@vger.kernel.org
Cc:     Amarula patchwork <linux-amarula@amarulasolutions.com>,
        Dario Binacchi <dario.binacchi@amarulasolutions.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Fabio Estevam <festevam@gmail.com>,
        Martin Kaiser <martin@kaiser.cx>,
        NXP Linux Team <linux-imx@nxp.com>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Russell King <linux@armlinux.org.uk>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Shawn Guo <shawnguo@kernel.org>,
        linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 1/1] ARM: imx: add missing of_node_put()
Date:   Thu,  8 Dec 2022 17:54:03 +0100
Message-Id: <20221208165404.1512014-2-dario.binacchi@amarulasolutions.com>
In-Reply-To: <20221208165404.1512014-1-dario.binacchi@amarulasolutions.com>
References: <20221208165404.1512014-1-dario.binacchi@amarulasolutions.com>
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Calling of_find_compatible_node() returns a node pointer with refcount
incremented. Use of_node_put() on it when done.
The patch fixes the same problem on different i.MX platforms.

Fixes: 8b88f7ef31dde ("ARM: mx25: Retrieve IIM base from dt")
Fixes: 94b2bec1b0e05 ("ARM: imx27: Retrieve the SYSCTRL base address from devicetree")
Fixes: 3172225d45bd9 ("ARM: imx31: Retrieve the IIM base address from devicetree")
Fixes: f68ea682d1da7 ("ARM: imx35: Retrieve the IIM base address from devicetree")
Fixes: ee18a7154ee08 ("ARM: imx5: retrieve iim base from device tree")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

---

Changes in v2:
- Combine the 5 patches (one for each platform) into one patch as
  suggested by Arnd Bergmann.

 arch/arm/mach-imx/cpu-imx25.c | 1 +
 arch/arm/mach-imx/cpu-imx27.c | 1 +
 arch/arm/mach-imx/cpu-imx31.c | 1 +
 arch/arm/mach-imx/cpu-imx35.c | 1 +
 arch/arm/mach-imx/cpu-imx5.c  | 1 +
 5 files changed, 5 insertions(+)

diff --git a/arch/arm/mach-imx/cpu-imx25.c b/arch/arm/mach-imx/cpu-imx25.c
index 3e63445cde06..cc86977d0a34 100644
--- a/arch/arm/mach-imx/cpu-imx25.c
+++ b/arch/arm/mach-imx/cpu-imx25.c
@@ -23,6 +23,7 @@ static int mx25_read_cpu_rev(void)
 
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx25-iim");
 	iim_base = of_iomap(np, 0);
+	of_node_put(np);
 	BUG_ON(!iim_base);
 	rev = readl(iim_base + MXC_IIMSREV);
 	iounmap(iim_base);
diff --git a/arch/arm/mach-imx/cpu-imx27.c b/arch/arm/mach-imx/cpu-imx27.c
index bf70e13bbe9e..1d2893908368 100644
--- a/arch/arm/mach-imx/cpu-imx27.c
+++ b/arch/arm/mach-imx/cpu-imx27.c
@@ -28,6 +28,7 @@ static int mx27_read_cpu_rev(void)
 
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx27-ccm");
 	ccm_base = of_iomap(np, 0);
+	of_node_put(np);
 	BUG_ON(!ccm_base);
 	/*
 	 * now we have access to the IO registers. As we need
diff --git a/arch/arm/mach-imx/cpu-imx31.c b/arch/arm/mach-imx/cpu-imx31.c
index b9c24b851d1a..35c544924e50 100644
--- a/arch/arm/mach-imx/cpu-imx31.c
+++ b/arch/arm/mach-imx/cpu-imx31.c
@@ -39,6 +39,7 @@ static int mx31_read_cpu_rev(void)
 
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx31-iim");
 	iim_base = of_iomap(np, 0);
+	of_node_put(np);
 	BUG_ON(!iim_base);
 
 	/* read SREV register from IIM module */
diff --git a/arch/arm/mach-imx/cpu-imx35.c b/arch/arm/mach-imx/cpu-imx35.c
index 80e7d8ab9f1b..1fe75b39c2d9 100644
--- a/arch/arm/mach-imx/cpu-imx35.c
+++ b/arch/arm/mach-imx/cpu-imx35.c
@@ -21,6 +21,7 @@ static int mx35_read_cpu_rev(void)
 
 	np = of_find_compatible_node(NULL, NULL, "fsl,imx35-iim");
 	iim_base = of_iomap(np, 0);
+	of_node_put(np);
 	BUG_ON(!iim_base);
 
 	rev = imx_readl(iim_base + MXC_IIMSREV);
diff --git a/arch/arm/mach-imx/cpu-imx5.c b/arch/arm/mach-imx/cpu-imx5.c
index ad56263778f9..a67c89bf155d 100644
--- a/arch/arm/mach-imx/cpu-imx5.c
+++ b/arch/arm/mach-imx/cpu-imx5.c
@@ -28,6 +28,7 @@ static u32 imx5_read_srev_reg(const char *compat)
 
 	np = of_find_compatible_node(NULL, NULL, compat);
 	iim_base = of_iomap(np, 0);
+	of_node_put(np);
 	WARN_ON(!iim_base);
 
 	srev = readl(iim_base + IIM_SREV) & 0xff;
-- 
2.32.0