From: Andy Shevchenko andy.shevchenko@gmail.com
stable inclusion from stable-5.10.50 commit 2e1d76c3b90feb8e6decfa88daf3aba4b2dceee0 bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 6d1c32dbedd7d7e7372aa38033ec8782c39f6379 ]
device_for_each_child_node() bumps a reference counting of a returned variable. We have to balance it whenever we return to the caller.
Cc: Brian Masney masneyb@onstation.org Cc: Dan Murphy dmurphy@ti.com Fixes: 8fbce8efe15cd ("backlight: lm3630a: Add firmware node support") Signed-off-by: Andy Shevchenko andy.shevchenko@gmail.com Reviewed-by: Brian Masney masneyb@onstation.org Reviewed-by: Daniel Thompson daniel.thompson@linaro.org Signed-off-by: Lee Jones lee.jones@linaro.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- 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;