linux-kernel - [PATCH 1/2] mfd: wcd934x: Fix an error handling path in wcd934x_slim

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Message-Id: <02d8447f6d1df52cc8357aae698152e9a9be67c6.1684565021.git.christophe.jaillet@wanadoo.fr>
Date:   Sat, 20 May 2023 09:10:54 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     Lee Jones <lee@...nel.org>,
        Maíra Canal <maira.canal@....br>
Cc:     linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Lee Jones <lee.jones@...aro.org>
Subject: [PATCH 1/2] mfd: wcd934x: Fix an error handling path in wcd934x_slim_probe()

If devm_gpiod_get_optional() fails, some resources need to be released, as
already done in the .remove() function.

While at it, remove the unneeded error code from a dev_err_probe() call.
It is already added in a human readable way by dev_err_probe() itself.

Fixes: 6a0ee2a61a31 ("mfd: wcd934x: Replace legacy gpio interface for gpiod")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/mfd/wcd934x.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/wcd934x.c b/drivers/mfd/wcd934x.c
index 07e884087f2c..281470d6b0b9 100644
--- a/drivers/mfd/wcd934x.c
+++ b/drivers/mfd/wcd934x.c
@@ -258,8 +258,9 @@ static int wcd934x_slim_probe(struct slim_device *sdev)
 	usleep_range(600, 650);
 	reset_gpio = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
 	if (IS_ERR(reset_gpio)) {
-		return dev_err_probe(dev, PTR_ERR(reset_gpio),
-				"Failed to get reset gpio: err = %ld\n", PTR_ERR(reset_gpio));
+		ret = dev_err_probe(dev, PTR_ERR(reset_gpio),
+				    "Failed to get reset gpio\n");
+		goto err_disable_regulators;
 	}
 	msleep(20);
 	gpiod_set_value(reset_gpio, 1);
@@ -269,6 +270,10 @@ static int wcd934x_slim_probe(struct slim_device *sdev)
 	dev_set_drvdata(dev, ddata);
 
 	return 0;
+
+err_disable_regulators:
+	regulator_bulk_disable(WCD934X_MAX_SUPPLY, ddata->supplies);
+	return ret;
 }
 
 static void wcd934x_slim_remove(struct slim_device *sdev)
-- 
2.34.1