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authorAxel Lin <axel.lin@gmail.com>2011-11-27 16:07:57 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-11-27 23:46:31 +0400
commit22d881c068403c155fbe320c0a26e3b1bcdaa1b8 (patch)
tree49f543948e610cb7ad2b49dc55861868383ee4e5 /drivers/regulator/fixed.c
parentbc91396b0b0a0d1300e151264b81f010c72a8bbf (diff)
downloadlinux-22d881c068403c155fbe320c0a26e3b1bcdaa1b8.tar.xz
regulator: Avoid potential NULL dereference in reg_fixed_voltage_probe()
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>
Diffstat (limited to 'drivers/regulator/fixed.c')
-rw-r--r--drivers/regulator/fixed.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/regulator/fixed.c b/drivers/regulator/fixed.c
index 703c26b756dc..ebec5e06dfa1 100644
--- a/drivers/regulator/fixed.c
+++ b/drivers/regulator/fixed.c
@@ -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) {