[PATCH v2 10/13] leds: lm3697: Make error handling more robust

From: Andy Shevchenko
Date: Sat May 29 2021 - 07:20:17 EST


It's easy to miss necessary clean up, e.g. firmware node reference counting,
during error path in ->probe(). Make it more robust by moving to a single
point of return.

Signed-off-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
---
v2: don't call for fwnode put on success (Pavel)
drivers/leds/leds-lm3697.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/leds/leds-lm3697.c b/drivers/leds/leds-lm3697.c
index 292d64b2eeab..a8c9322558cc 100644
--- a/drivers/leds/leds-lm3697.c
+++ b/drivers/leds/leds-lm3697.c
@@ -226,14 +226,12 @@ static int lm3697_probe_dt(struct lm3697 *priv)
ret = fwnode_property_read_u32(child, "reg", &control_bank);
if (ret) {
dev_err(dev, "reg property missing\n");
- fwnode_handle_put(child);
goto child_out;
}

if (control_bank > LM3697_CONTROL_B) {
dev_err(dev, "reg property is invalid\n");
ret = -EINVAL;
- fwnode_handle_put(child);
goto child_out;
}

@@ -264,7 +262,6 @@ static int lm3697_probe_dt(struct lm3697 *priv)
led->num_leds);
if (ret) {
dev_err(dev, "led-sources property missing\n");
- fwnode_handle_put(child);
goto child_out;
}

@@ -289,14 +286,16 @@ static int lm3697_probe_dt(struct lm3697 *priv)
&init_data);
if (ret) {
dev_err(dev, "led register err: %d\n", ret);
- fwnode_handle_put(child);
goto child_out;
}

i++;
}

+ return ret;
+
child_out:
+ fwnode_handle_put(child);
return ret;
}

--
2.31.1