[PATCH 5.15.y 3/5] leds: lm3601x: Improve error reporting for problems during .remove()

[Sasha Levin <sashal@kernel.org>]

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

[ Upstream commit 22a23436891886a66d21af3619f4a4e8809f0e0a ]

Returning an error value in an i2c remove callback results in a generic
error message being emitted by the i2c core, but otherwise it doesn't
make a difference. The device goes away anyhow and the devm cleanups are
called.

So instead of triggering the generic i2c error message, emit a more
helpful message if a problem occurs and return 0 to suppress the generic
message.

This patch is a preparation for making i2c remove callbacks return void.

Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Stable-dep-of: 1f0bdc2884b6 ("usb: typec: ucsi: ccg: Fix use-after-free of ucsi on remove")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/leds/flash/leds-lm3601x.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/leds/flash/leds-lm3601x.c b/drivers/leds/flash/leds-lm3601x.c
index 3d127274820173..37e1d6e6868777 100644
--- a/drivers/leds/flash/leds-lm3601x.c
+++ b/drivers/leds/flash/leds-lm3601x.c
@@ -443,10 +443,15 @@ static int lm3601x_probe(struct i2c_client *client)
 static int lm3601x_remove(struct i2c_client *client)
 {
 	struct lm3601x_led *led = i2c_get_clientdata(client);
+	int ret;
 
-	return regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
-			   LM3601X_ENABLE_MASK,
-			   LM3601X_MODE_STANDBY);
+	ret = regmap_update_bits(led->regmap, LM3601X_ENABLE_REG,
+				 LM3601X_ENABLE_MASK, LM3601X_MODE_STANDBY);
+	if (ret)
+		dev_warn(&client->dev,
+			 "Failed to put into standby (%pe)\n", ERR_PTR(ret));
+
+	return 0;
 }
 
 static const struct i2c_device_id lm3601x_id[] = {
-- 
2.53.0