sandbox: Check the filename in jump_to_image_no_args()

If the filename is NULL this function currently crashes. Update it to fail
gracefully.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/arch/sandbox/cpu/spl.c b/arch/sandbox/cpu/spl.c
index 5005ed2..2ca4cd6 100644 (file)
--- a/arch/sandbox/cpu/spl.c
+++ b/arch/sandbox/cpu/spl.c
@@ -69,7 +69,11 @@ void __noreturn jump_to_image_no_args(struct spl_image_info *spl_image)
 {
        const char *fname = spl_image->arg;
 
-       os_fd_restore();
-       os_spl_to_uboot(fname);
+       if (fname) {
+               os_fd_restore();
+               os_spl_to_uboot(fname);
+       } else {
+               printf("No filename provided for U-Boot\n");
+       }
        hang();
 }