Commit 42c38d4a authored by Pavel Machek's avatar Pavel Machek Committed by Ulf Hansson
Browse files

mmc: core: Fix warning and undefined behavior in mmc voltage handling 



!voltage_ranges is tested for too late, allowing warning and undefined
behavior. Fix that.

Signed-off-by: default avatarPavel Machek <pavel@ucw.cz>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 4c94cb65

drivers/mmc/core/host.c

+1 −1
Original line number Diff line number Diff line
@@ -363,11 +363,11 @@ int mmc_of_parse_voltage(struct device_node *np, u32 *mask) 
	int num_ranges, i;



	voltage_ranges = of_get_property(np, "voltage-ranges", &num_ranges);

	num_ranges = num_ranges / sizeof(*voltage_ranges) / 2;

	if (!voltage_ranges) {

		pr_debug("%pOF: voltage-ranges unspecified\n", np);

		return 0;

	}

	num_ranges = num_ranges / sizeof(*voltage_ranges) / 2;

	if (!num_ranges) {

		pr_err("%pOF: voltage-ranges empty\n", np);

		return -EINVAL;