usbd: check mmc is supported

Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/common/cmd_usbd.c b/common/cmd_usbd.c
index cc4a2ef..8099722 100644 (file)
--- a/common/cmd_usbd.c
+++ b/common/cmd_usbd.c
@@ -347,6 +347,11 @@ static int write_file_mmc(struct usbd_ops *usbd, char *ramaddr, u32 len,
        int i;
        int ret;
 
+       if (!usbd->mmc_total) {
+               printf("MMC is not supported!\n");
+               return 0;
+       }
+
        ram_addr = (u32)down_ram_addr;
 
        if (cur_blk_offset == 0) {