>-----Original Message-----
>From: U-Boot <u-boot-boun...@lists.denx.de> On Behalf Of Michael Walle
>Sent: Tuesday, October 22, 2019 2:07 AM
>To: u-boot@lists.denx.de
>Cc: Tom Rini <tr...@konsulko.com>
>Subject: [U-Boot] [PATCH] armv8: fsl-layerscape: fix hwconfig and prefetching
>
>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
>
Please check similar patch at http://patchwork.ozlabs.org/patch/1187188/
Does this solve your issue?
--priyankajain
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