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Date: Fri, 03 Mar 2017 22:20:44 +0100
From: Harald Geyer <harald@...ib.org>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Heiko Stuebner <heiko@...ech.de>
Cc: <linux-kernel@...r.kernel.org>
Subject: [bug] regulator: fixed, gpio: probe fails on unset regulator-name
Hi!
Documentation/devicetree/bindings/regulator/regulator.txt says that the
regulator-name property is optional. However fixed and gpio regulators
fail in probe with the following message, if the property is not
present:
| reg-fixed-voltage regulators:sensor_supply: Failed to allocate supply
name
| reg-fixed-voltage: probe of regulators:sensor_supply failed with
error -12
This is caused by the following code in both drivers:
drvdata->desc.name = devm_kstrdup(&pdev->dev,
config->supply_name,
GFP_KERNEL);
if (drvdata->desc.name == NULL) {
dev_err(&pdev->dev, "Failed to allocate supply
name\n");
return -ENOMEM;
}
If config->supply_name == NULL, then devm_kstrdup() also returns NULL.
I don't know whether the binding document or the implementation is
wrong,
so can't propose a fix for this. Sorry.
TIA,
Harald
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