If CONFIG_HWCONFIG is disabled, hwconfig_subarg_f() will return the
empty string, ie. not NULL. Therefore, we have to check the returned
argument length as well as the return value.
Signed-off-by: Michael Walle <mich...@walle.cc>
---
arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index a5d0b5370f..4bb73b524c 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -1073,7 +1073,7 @@ static void config_core_prefetch(void)
prefetch_arg = hwconfig_subarg_f("core_prefetch", "disable",
&arglen, buf);
- if (prefetch_arg) {
+ if (arglen && prefetch_arg) {
mask = simple_strtoul(prefetch_arg, NULL, 0) & 0xff;
if (mask & 0x1) {
printf("Core0 prefetch can't be disabled\n");
--
2.20.1
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