[PATCH 5.4 033/191] leds: lm3692x: Handle failure to probe the regulator

From: Greg Kroah-Hartman
Date: Thu Jan 02 2020 - 17:13:18 EST


From: Guido GÃnther <agx@xxxxxxxxxxx>

[ Upstream commit 396128d2ffcba6e1954cfdc9a89293ff79cbfd7c ]

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

Signed-off-by: Guido GÃnther <agx@xxxxxxxxxxx>
Acked-by: Pavel Machek <pavel@xxxxxx>
Reviewed-by: Dan Murphy <dmurphy@xxxxxx>
Signed-off-by: Pavel Machek <pavel@xxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/leds/leds-lm3692x.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/leds/leds-lm3692x.c b/drivers/leds/leds-lm3692x.c
index 3d381f2f73d0..1ac9a44570ee 100644
--- a/drivers/leds/leds-lm3692x.c
+++ b/drivers/leds/leds-lm3692x.c
@@ -334,9 +334,18 @@ 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 = devm_regulator_get_optional(&led->client->dev, "vled");
+ if (IS_ERR(led->regulator)) {
+ ret = PTR_ERR(led->regulator);
+ if (ret != -ENODEV) {
+ if (ret != -EPROBE_DEFER)
+ dev_err(&led->client->dev,
+ "Failed to get vled regulator: %d\n",
+ ret);
+ return ret;
+ }
led->regulator = NULL;
+ }

child = device_get_next_child_node(&led->client->dev, child);
if (!child) {
--
2.20.1