[U-Boot] [PATCH] armv8: fsl-layerscape: fix warning if no hwconfig is defined

[Pankaj Bansal]

if no hwconfig variable is defined for a platform and we try to get the
subarg of hwconfig, we receive a warning:
WARNING: Calling __hwconfig without a buffer and before environment is ready

Therefore, if hwconfig is not found return without further processing.

Signed-off-by: Pankaj Bansal <pankaj.bansal at nxp.com>
---
 arch/arm/cpu/armv8/fsl-layerscape/cpu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
index dee96afe2d..46e4b290ad 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/cpu.c
@@ -1065,6 +1065,8 @@ static void config_core_prefetch(void)
 
 	if (env_get_f("hwconfig", buffer, sizeof(buffer)) > 0)
 		buf = buffer;
+	else
+		return;
 
 	prefetch_arg = hwconfig_subarg_f("core_prefetch", "disable",
 					 &arglen, buf);
-- 
2.17.1