image.c: Fix non-Android booting with ramdisk and/or device tree

In 1fec3c5 I added a check that if we had an Android image we default to
trying the kernel address for a ramdisk.  However when we don't have an
Android image buf is NULL and we oops here.  Ensure that we have 'buf'
to check first.

Reported-by: elipe Balbi <balbi@ti.com>
Signed-off-by: Tom Rini <trini@konsulko.com>

diff --git a/common/image.c b/common/image.c
index e607109..85c4f39 100644 (file)
--- a/common/image.c
+++ b/common/image.c
@@ -913,7 +913,7 @@ int boot_get_ramdisk(int argc, char * const argv[], bootm_headers_t *images,
         * Look for an Android boot image.
         */
        buf = map_sysmem(images->os.start, 0);
-       if (genimg_get_format(buf) == IMAGE_FORMAT_ANDROID)
+       if (buf && genimg_get_format(buf) == IMAGE_FORMAT_ANDROID)
                select = argv[0];
 #endif