of_find_compatible_node() returns a node pointer with refcount
incremented, we should use of_node_put() on it when done.
Add missing of_node_put() to avoid refcount leak.

Fixes: 5919eec0f092 ("ARM: mstar: SMP support")
Fixes: 312b62b6610c ("ARM: mstar: Add machine for MStar/Sigmastar Armv7 SoCs")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
---
 arch/arm/mach-mstar/mstarv7.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/mach-mstar/mstarv7.c b/arch/arm/mach-mstar/mstarv7.c
index 274c4f0df270..3176998817d2 100644
--- a/arch/arm/mach-mstar/mstarv7.c
+++ b/arch/arm/mach-mstar/mstarv7.c
@@ -86,6 +86,7 @@ static int mstarv7_boot_secondary(unsigned int cpu, struct task_struct *idle)
 
 	np = of_find_compatible_node(NULL, NULL, "mstar,smpctrl");
 	smpctrl = of_iomap(np, 0);
+	of_node_put(np);
 
 	if (!smpctrl)
 		return -ENODEV;
@@ -120,6 +121,7 @@ static void __init mstarv7_init(void)
 		soc_mb = mstarv7_mb;
 	else
 		pr_warn("Failed to install memory barrier, DMA will be broken!\n");
+	of_node_put(np);
 }
 
 DT_MACHINE_START(MSTARV7_DT, "MStar/Sigmastar Armv7 (Device Tree)")
-- 
2.25.1

Hi,

Le jeu. 12 mai 2022 à 05:47, Miaoqian Lin <linmq006@gmail.com> a écrit :
>
> of_find_compatible_node() returns a node pointer with refcount
> incremented, we should use of_node_put() on it when done.
> Add missing of_node_put() to avoid refcount leak.
>
> Fixes: 5919eec0f092 ("ARM: mstar: SMP support")
> Fixes: 312b62b6610c ("ARM: mstar: Add machine for MStar/Sigmastar Armv7 SoCs")
> Signed-off-by: Miaoqian Lin <linmq006@gmail.com>

Looks good to me,

Reviewed-by: Romain Perier <romain.perier@gmail.com>