Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Wen Yang <wen.yang99@zte.com.cn>
To:     liviu.dudau@arm.com
Cc:     sudeep.holla@arm.com, lorenzo.pieralisi@arm.com,
        linux@armlinux.org.uk, linux-arm-kernel@lists.infradead.org,
        linux-kernel@vger.kernel.org, kgene@kernel.org, krzk@kernel.org,
        linux-samsung-soc@vger.kernel.org, michal.simek@xilinx.com,
        afaerber@suse.de, manivannan.sadhasivam@linaro.org,
        dinguyen@kernel.org, heiko@sntech.de,
        linux-rockchip@lists.infradead.org, f.fainelli@gmail.com,
        rjui@broadcom.com, sbranden@broadcom.com,
        bcm-kernel-feedback-list@broadcom.com, linus.walleij@linaro.org,
        avifishman70@gmail.com, tmaimon77@gmail.com, venture@google.com,
        yuenn@google.com, brendanhiggins@google.com,
        openbmc@lists.ozlabs.org, xuwei5@hisilicon.com,
        maxime.ripard@bootlin.com, wens@csie.org, catalin.marinas@arm.com,
        will.deacon@arm.com, horms@verge.net.au, magnus.damm@gmail.com,
        linux-renesas-soc@vger.kernel.org, shawnguo@kernel.org,
        s.hauer@pengutronix.de, kernel@pengutronix.de,
        fabio.estevam@nxp.com, linux-imx@nxp.com, wang.yi59@zte.com.cn,
        Wen Yang <wen.yang99@zte.com.cn>
Subject: [PATCH 13/15] ARM: zynq: fix a leaked reference by addingmissing of_node_put
Date:   Fri, 1 Mar 2019 16:56:54 +0800
Message-Id: <1551430616-42014-13-git-send-email-wen.yang99@zte.com.cn>
In-Reply-To: <1551430616-42014-1-git-send-email-wen.yang99@zte.com.cn>
References: <1551430616-42014-1-git-send-email-wen.yang99@zte.com.cn>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

The call to of_get_next_child returns a node pointer with refcount
incremented thus it must be explicitly decremented after the last
usage.

Detected by coccinelle with the following warnings:
./arch/arm/mach-zynq/common.c:89:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 80, but without a corresponding object release within this function.
./arch/arm/mach-zynq/common.c:98:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 80, but without a corresponding object release within this function.

Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Michal Simek <michal.simek@xilinx.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
 arch/arm/mach-zynq/common.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c
index 6aba9eb..a8b1b9c 100644
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -84,6 +84,7 @@ static int __init zynq_get_revision(void)
 	}
 
 	zynq_devcfg_base = of_iomap(np, 0);
+	of_node_put(np);
 	if (!zynq_devcfg_base) {
 		pr_err("%s: Unable to map I/O memory\n", __func__);
 		return -1;
-- 
2.9.5