backlight: lm3630a_bl: Put fwnode in error case during ->probe()

device_for_each_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.

Fixes: 8fbce8efe15cd ("backlight: lm3630a: Add firmware node support")
Cc: Brian Masney <redacted>
Cc: Dan Murphy <redacted>
Signed-off-by: Andy Shevchenko <redacted>
---
 drivers/video/backlight/lm3630a_bl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/video/backlight/lm3630a_bl.c b/drivers/video/backlight/lm3630a_bl.c
index e88a2b0e5904..662029d6a3dc 100644
--- a/drivers/video/backlight/lm3630a_bl.c
+++ b/drivers/video/backlight/lm3630a_bl.c

@@ -482,8 +482,10 @@ static int lm3630a_parse_node(struct lm3630a_chip *pchip,
 
 	device_for_each_child_node(pchip->dev, node) {
 		ret = lm3630a_parse_bank(pdata, node, &seen_led_sources);
-		if (ret)
+		if (ret) {
+			fwnode_handle_put(node);
 			return ret;
+		}
 	}
 
 	return ret;

-- 
2.31.1

On Mon, May 10, 2021 at 12:57:16PM +0300, Andy Shevchenko wrote:

device_for_each_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.

Fixes: 8fbce8efe15cd ("backlight: lm3630a: Add firmware node support")
Cc: Brian Masney <redacted>
Cc: Dan Murphy <redacted>
Signed-off-by: Andy Shevchenko <redacted>

Reviewed-by: Brian Masney <redacted>

On Mon, May 10, 2021 at 12:57:16PM +0300, Andy Shevchenko wrote:

device_for_each_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.

Fixes: 8fbce8efe15cd ("backlight: lm3630a: Add firmware node support")
Cc: Brian Masney <redacted>
Cc: Dan Murphy <redacted>
Signed-off-by: Andy Shevchenko <redacted>

Reviewed-by: Daniel Thompson <redacted>

On Mon, 10 May 2021, Andy Shevchenko wrote:

device_for_each_child_node() bumps a reference counting of a returned variable.
We have to balance it whenever we return to the caller.

Fixes: 8fbce8efe15cd ("backlight: lm3630a: Add firmware node support")
Cc: Brian Masney <redacted>
Cc: Dan Murphy <redacted>
Signed-off-by: Andy Shevchenko <redacted>
---
 drivers/video/backlight/lm3630a_bl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]
Senior Technical Lead - Developer Services
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