[PATCH 4.16 164/272] regulator: gpio: Fix some error handling paths in gpio_regulator_probe()

Greg Kroah-Hartman
2018-05-28T11:44:03Z

From: Christophe Jaillet <christophe.jaillet@wanadoo.fr>

[ Upstream commit ed8cffda27dea6fd3dafb3ee881c5a786edac9ca ]

Re-order error handling code and gotos to avoid leaks in error handling
paths.

Fixes: 9f946099fe19 ("regulator: gpio: fix parsing of gpio list")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/regulator/gpio-regulator.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)

--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -271,8 +271,7 @@ static int gpio_regulator_probe(struct p
drvdata->desc.name = kstrdup(config->supply_name, GFP_KERNEL);
if (drvdata->desc.name == NULL) {
dev_err(&pdev->dev, "Failed to allocate supply name\n");
- ret = -ENOMEM;
- goto err;
+ return -ENOMEM;
}

if (config->nr_gpios != 0) {
@@ -292,7 +291,7 @@ static int gpio_regulator_probe(struct p
dev_err(&pdev->dev,
"Could not obtain regulator setting GPIOs: %d\n",
ret);
- goto err_memstate;
+ goto err_memgpio;
}
}

@@ -303,7 +302,7 @@ static int gpio_regulator_probe(struct p
if (drvdata->states == NULL) {
dev_err(&pdev->dev, "Failed to allocate state data\n");
ret = -ENOMEM;
- goto err_memgpio;
+ goto err_stategpio;
}
drvdata->nr_states = config->nr_states;

@@ -324,7 +323,7 @@ static int gpio_regulator_probe(struct p
default:
dev_err(&pdev->dev, "No regulator type set\n");
ret = -EINVAL;
- goto err_memgpio;
+ goto err_memstate;
}

/* build initial state from gpio init data. */
@@ -361,22 +360,21 @@ static int gpio_regulator_probe(struct p
if (IS_ERR(drvdata->dev)) {
ret = PTR_ERR(drvdata->dev);
dev_err(&pdev->dev, "Failed to register regulator: %d\n", ret);
- goto err_stategpio;
+ goto err_memstate;
}

platform_set_drvdata(pdev, drvdata);

return 0;

-err_stategpio:
- gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
err_memstate:
kfree(drvdata->states);
+err_stategpio:
+ gpio_free_array(drvdata->gpios, drvdata->nr_gpios);
err_memgpio:
kfree(drvdata->gpios);
err_name:
kfree(drvdata->desc.name);
-err:
return ret;
}