From 251b9c21d26ca9d210e7673f0819ee1f6c19402a Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Sat, 9 Nov 2013 13:12:28 +0100 Subject: regulator: gpio-regulator: Don't oops on missing regulator-type property 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 Signed-off-by: Mark Brown --- 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 98a98ffa7fe0..bcd827c363dc 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", ®type); + ret = of_property_read_string(np, "regulator-type", ®type); + if (ret < 0) { + dev_err(dev, "Missing 'regulator-type' property\n"); + return ERR_PTR(-EINVAL); + } if (!strncmp("voltage", regtype, 7)) config->type = REGULATOR_VOLTAGE; -- cgit v1.2.3