linux-kernel - [PATCH 3/5] leds: lm3692x: Handle failure to probe the regulator

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Date:   Tue, 17 Sep 2019 19:19:56 -0700
From:   Guido Günther <agx@...xcpu.org>
To:     Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Pavel Machek <pavel@....cz>, Dan Murphy <dmurphy@...com>,
        linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 3/5] leds: lm3692x: Handle failure to probe the regulator

Instead use devm_regulator_get_optional since the regulator
is optional and check for errors.

Signed-off-by: Guido Günther <agx@...xcpu.org>
---
 drivers/leds/leds-lm3692x.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
index f394669ad8f2..9972c932d51e 100644
--- a/drivers/leds/leds-lm3692x.c
+++ b/drivers/leds/leds-lm3692x.c
@@ -333,9 +333,14 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
 		return ret;
 	}
 
-	led->regulator = devm_regulator_get(&led->client->dev, "vled");
-	if (IS_ERR(led->regulator))
-		led->regulator = NULL;
+	led->regulator = devm_regulator_get_optional(&led->client->dev, "vled");
+	if (IS_ERR(led->regulator)) {
+		ret = PTR_ERR(led->regulator);
+		if (ret != -EPROBE_DEFER)
+			dev_err(&led->client->dev,
+				"Failed to get vled regulator: %d\n", ret);
+		return ret;
+	}
 
 	child = device_get_next_child_node(&led->client->dev, child);
 	if (!child) {
-- 
2.23.0.rc1