From 42c38d4a1bc41e78dedbf73b0fb35e44007789bb Mon Sep 17 00:00:00 2001 From: Pavel Machek Date: Tue, 16 Apr 2019 09:58:45 +0200 Subject: [PATCH] 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: Pavel Machek Signed-off-by: Ulf Hansson --- drivers/mmc/core/host.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 3a4402a79904..b3fa9c916142 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -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; -- 2.20.1