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 michael@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");