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regulator: fixed: Prevent NULL pointer dereference when !CONFIG_OF 

Use of_device_get_match_data which has NULL test for match before
dereference match->data. Add NULL test for drvtype so it still works
for fixed_voltage_ops when !CONFIG_OF.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Reviewed-by: Philippe Schenker <philippe.schenker@toradex.com>
Link: https://lore.kernel.org/r/20190922022928.28355-1-axel.lin@ingics.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Axel Lin 2019-09-22 10:29:28 +08:00 committed by Mark Brown
parent f8970d341e
commit 1d6db22ff7
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GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 3 deletions
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5
drivers/regulator/fixed.c
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@ -144,8 +144,7 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct fixed_voltage_config *config;
struct fixed_voltage_data *drvdata;
const struct fixed_dev_type *drvtype =
of_match_device(dev->driver->of_match_table, dev)->data;
const struct fixed_dev_type *drvtype = of_device_get_match_data(dev);
struct regulator_config cfg = { };
enum gpiod_flags gflags;
int ret;
@ -177,7 +176,7 @@ static int reg_fixed_voltage_probe(struct platform_device *pdev)
drvdata->desc.type = REGULATOR_VOLTAGE;
drvdata->desc.owner = THIS_MODULE;
if (drvtype->has_enable_clock) {
if (drvtype && drvtype->has_enable_clock) {
drvdata->desc.ops = &fixed_voltage_clkenabled_ops;
drvdata->enable_clock = devm_clk_get(dev, NULL);