[3/4] ARM: rockchip: fix a leaked reference by adding missing of_node_put
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Message ID 1551785577-45896-3-git-send-email-wen.yang99@zte.com.cn
State New
Headers show
Series
  • Untitled series #87809
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Commit Message

Wen Yang March 5, 2019, 11:32 a.m. UTC
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-rockchip/platsmp.c:250:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 241, but without a corresponding object release within this function.
./arch/arm/mach-rockchip/platsmp.c:260:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 241, but without a corresponding object release within this function.
./arch/arm/mach-rockchip/platsmp.c:263:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 241, 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: Heiko Stuebner <heiko@sntech.de>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-rockchip@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
---
 arch/arm/mach-rockchip/platsmp.c | 1 +
 1 file changed, 1 insertion(+)

Comments

Heiko Stübner April 23, 2019, 5:54 p.m. UTC | #1
Am Dienstag, 5. März 2019, 12:32:56 CEST schrieb Wen Yang:
> 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-rockchip/platsmp.c:250:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 241, but without a corresponding object release within this function.
> ./arch/arm/mach-rockchip/platsmp.c:260:2-8: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 241, but without a corresponding object release within this function.
> ./arch/arm/mach-rockchip/platsmp.c:263:1-7: ERROR: missing of_node_put; acquired a node pointer with refcount incremented on line 241, 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: Heiko Stuebner <heiko@sntech.de>
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-rockchip@lists.infradead.org
> Cc: linux-kernel@vger.kernel.org

applied for 5.2 after adapting the patch subject a little bit

Thanks
Heiko

Patch
diff mbox series

diff --git a/arch/arm/mach-rockchip/platsmp.c b/arch/arm/mach-rockchip/platsmp.c
index f93d64e..6cb4b21 100644
--- a/arch/arm/mach-rockchip/platsmp.c
+++ b/arch/arm/mach-rockchip/platsmp.c
@@ -245,6 +245,7 @@  static int __init rockchip_smp_prepare_pmu(void)
 	}
 
 	pmu_base = of_iomap(node, 0);
+	of_node_put(node);
 	if (!pmu_base) {
 		pr_err("%s: could not map pmu registers\n", __func__);
 		return -ENOMEM;