linux-kernel - [PATCH 5.19 205/717] leds: lm3601x: Dont use mutex after it was destroyed

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Date:   Sat, 22 Oct 2022 09:21:24 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Pavel Machek <pavel@....cz>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Wolfram Sang <wsa@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.19 205/717] leds: lm3601x: Dont use mutex after it was destroyed

From: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>

[ Upstream commit 32f7eed0c763a9b89f6b357ec54b48398fc7b99e ]

The mutex might still be in use until the devm cleanup callback
devm_led_classdev_flash_release() is called. This only happens some time
after lm3601x_remove() completed.

Fixes: e63a744871a3 ("leds: lm3601x: Convert class registration to device managed")
Acked-by: Pavel Machek <pavel@....cz>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
Signed-off-by: Wolfram Sang <wsa@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/leds/flash/leds-lm3601x.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/leds/flash/leds-lm3601x.c b/drivers/leds/flash/leds-lm3601x.c
index d0e1d4814042..3d1272748201 100644
--- a/drivers/leds/flash/leds-lm3601x.c
+++ b/drivers/leds/flash/leds-lm3601x.c
@@ -444,8 +444,6 @@ static int lm3601x_remove(struct i2c_client *client)
 {
 	struct lm3601x_led *led = i2c_get_clientdata(client);
 
-	mutex_destroy(&led->lock);
-
 	return regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
 			   LM3601X_ENABLE_MASK,
 			   LM3601X_MODE_STANDBY);
-- 
2.35.1