On Sun, Jul 10, 2022 at 09:37:10AM +0800, Liang He wrote:

At 2022-07-09 12:49:23, "Dmitry Torokhov" [off-list ref] wrote:

quoted

Hi Liang,

On Sun, Jun 19, 2022 at 03:30:36PM +0800, Liang He wrote:

quoted

In i8042_platform_init() and i8042_platform_exit(), we need call
of_node_put() to keep refcount balance.

Signed-off-by: Liang He <redacted>
---
 drivers/input/serio/i8042-sparcio.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/input/serio/i8042-sparcio.h b/drivers/input/serio/i8042-sparcio.h
index fce76812843b..a2a9db9220d7 100644
--- a/drivers/input/serio/i8042-sparcio.h
+++ b/drivers/input/serio/i8042-sparcio.h

@@ -108,6 +108,8 @@ static int __init i8042_platform_init(void)
 	struct device_node *root = of_find_node_by_path("/");
 	const char *name = of_get_property(root, "name", NULL);
 
+	of_node_put(root);
+
 	if (name && !strcmp(name, "SUNW,JavaStation-1")) {
 		/* Hardcoded values for MrCoffee.  */
 		i8042_kbd_irq = i8042_aux_irq = 13 | 0x20;

@@ -139,6 +141,8 @@ static inline void i8042_platform_exit(void)
 	struct device_node *root = of_find_node_by_path("/");
 	const char *name = of_get_property(root, "name", NULL);
 
+	of_node_put(root);
+
 	if (!name || strcmp(name, "SUNW,JavaStation-1"))
 		platform_driver_unregister(&sparc_i8042_driver);
 }

There already was an attempt to fix this issue in a slightly better way,
unfortunately the original author did not finish the work:

https://lore.kernel.org/all/20181212163548.23723-1-tiny.windzz@gmail.com/ (local)

Thanks.

-- 
Dmitry

Hi, Dmirtry,

Thanks for reviewing my patch code.

The Li's patch adds a helper and is better than mine.

Right, however there is a compile error in Li's version. It would be
great if someone could finish their work.

Thanks.

-- 
Dmitry