[PATCH 3/3] libfdt: fdt_get_name: Add can_assume(VALID_DTB) check

In this function from fdt_ro.c we have (reasonably) some checks of the
DTB before we begin work. However, we do this in a way that we cannot
make use of the normal FDT_RO_PROBE macro and instead have a direct call
to fdt_ro_probe_(). Add a test for !can_assume(VALID_DTB) here first so
that in cases where we are assuming a valid DTB we can omit the checks.

Signed-off-by: Tom Rini <[email protected]>
---
This is another case which we see in U-Boot SPL, and for the last 6
years now have had the equivalent check. This change ends up being a
noticeable size win for us.
---
 libfdt/fdt_ro.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c
index b78c4e48f1cb..63494fb7ad90 100644
--- a/libfdt/fdt_ro.c
+++ b/libfdt/fdt_ro.c
@@ -306,8 +306,8 @@ const char *fdt_get_name(const void *fdt, int nodeoffset, int *len)
 	const char *nameptr;
 	int err;
 
-	if (((err = fdt_ro_probe_(fdt)) < 0)
-	    || ((err = fdt_check_node_offset_(fdt, nodeoffset)) < 0))
+	if (!can_assume(VALID_DTB) && (((err = fdt_ro_probe_(fdt)) < 0)
+	    || ((err = fdt_check_node_offset_(fdt, nodeoffset)) < 0)))
 			goto fail;
 
 	nameptr = nh->name;
-- 
2.43.0