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regulator: Avoid potential NULL dereference in reg_fixed_voltage_probe()

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of_get_fixed_voltage_config() may return NULL, return -ENOMEM in this case
so we don't dereference NULL pointer.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Axel Lin 2011-11-27 20:07:57 +08:00 committed by Mark Brown
parent bc91396b0b
commit 22d881c068
1 changed files with 6 additions and 1 deletions
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7
drivers/regulator/fixed.c
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@ -160,12 +160,17 @@ static struct regulator_ops fixed_voltage_ops = {
static int __devinit reg_fixed_voltage_probe(struct platform_device *pdev)
{
struct fixed_voltage_config *config = pdev->dev.platform_data;
struct fixed_voltage_config *config;
struct fixed_voltage_data *drvdata;
int ret;
if (pdev->dev.of_node)
config = of_get_fixed_voltage_config(&pdev->dev);
else
config = pdev->dev.platform_data;
if (!config)
return -ENOMEM;
drvdata = kzalloc(sizeof(struct fixed_voltage_data), GFP_KERNEL);
if (drvdata == NULL) {