env: mmc/fat/ext4: make sure that the MMC sub-system is initialized before using it

When booting from a non-MMC device, the MMC sub-system may not be
initialized when the environment is first accessed.
We need to make sure that the MMC sub-system is ready in even a non-MMC
boot case.

Therefore, initialize mmc before loading environment from it.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/env/fat.c b/env/fat.c
index e6bd1f915d..19f260e881 100644
--- a/env/fat.c
+++ b/env/fat.c
@@ -89,6 +89,9 @@ static int env_fat_load(void)
 	int dev, part;
 	int err;
 
+	if (!strcmp(CONFIG_ENV_FAT_INTERFACE, "mmc"))
+		mmc_initialize(NULL);
+
 	part = blk_get_device_part_str(CONFIG_ENV_FAT_INTERFACE,
 					CONFIG_ENV_FAT_DEVICE_AND_PART,
 					&dev_desc, &info, 1);