linux-kernel - [PATCH AUTOSEL 4.19 17/79] leds: lm3692x: Handle failure to probe the regulator

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20191211152643.23056-17-sashal@kernel.org>
Date:   Wed, 11 Dec 2019 10:25:41 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Guido Günther <agx@...xcpu.org>,
        Pavel Machek <pavel@....cz>, Dan Murphy <dmurphy@...com>,
        Sasha Levin <sashal@...nel.org>, linux-leds@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 17/79] leds: lm3692x: Handle failure to probe the regulator

From: Guido Günther <agx@...xcpu.org>

[ Upstream commit 396128d2ffcba6e1954cfdc9a89293ff79cbfd7c ]

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

Signed-off-by: Guido Günther <agx@...xcpu.org>
Acked-by: Pavel Machek <pavel@....cz>
Reviewed-by: Dan Murphy <dmurphy@...com>
Signed-off-by: Pavel Machek <pavel@....cz>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 4f413a7c5f056..d79a66a73169f 100644
--- a/drivers/leds/leds-lm3692x.c
+++ b/drivers/leds/leds-lm3692x.c
@@ -337,9 +337,18 @@ 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