[PATCH] regulator: gpio-regulator: Don't oops on missing regulator-type property

[Laurent Pinchart]

Catch missing regulator-type property in DT and return an error
gracefully instead of deferencing a NULL pointer and crashing.

Signed-off-by: Laurent Pinchart <laurent.pinchart+rene...@ideasonboard.com>
---
 drivers/regulator/gpio-regulator.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/regulator/gpio-regulator.c 
b/drivers/regulator/gpio-regulator.c
index 98a98ff..bcd827c 100644
--- a/drivers/regulator/gpio-regulator.c
+++ b/drivers/regulator/gpio-regulator.c
@@ -139,6 +139,7 @@ of_get_gpio_regulator_config(struct device *dev, struct 
device_node *np)
        struct property *prop;
        const char *regtype;
        int proplen, gpio, i;
+       int ret;
 
        config = devm_kzalloc(dev,
                        sizeof(struct gpio_regulator_config),
@@ -202,7 +203,11 @@ of_get_gpio_regulator_config(struct device *dev, struct 
device_node *np)
        }
        config->nr_states = i;
 
-       of_property_read_string(np, "regulator-type", &regtype);
+       ret = of_property_read_string(np, "regulator-type", &regtype);
+       if (ret < 0) {
+               dev_err(dev, "Missing 'regulator-type' property\n");
+               return ERR_PTR(-EINVAL);
+       }
 
        if (!strncmp("voltage", regtype, 7))
                config->type = REGULATOR_VOLTAGE;
-- 
Regards,

Laurent Pinchart

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