[PATCH] libfdt: fdt_check_full: Add can_assume(PERFECT) check

In this function from fdt_check.c we have (reasonably and as the name
implies) a number of checks on the DTB. However, there are cases where
we may wish to assume that we have been given a perfect DTB already and
do nothing here. Add a test for can_assume(PERFECT) as the first check
in this function and if true, perform no checks.

Signed-off-by: Tom Rini <[email protected]>
---
Along the lines of the patches I posted back in December, in U-Boot SPL
we just don't have the space for this check much of the time and so have
always omitted it (going back to at least when Simon posted the initial
patch to make libfdt/fdt_check.c here). This is another case where it's
a noticeable size win for us. I had missed this change in particular
because we had in turn missed catching up on fdt_check_full being moved
out of fdt_ro.c and in to fdt_check.c.
---
 libfdt/fdt_check.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libfdt/fdt_check.c b/libfdt/fdt_check.c
index cca052353213..2fd5b61d016a 100644
--- a/libfdt/fdt_check.c
+++ b/libfdt/fdt_check.c
@@ -21,6 +21,8 @@ int fdt_check_full(const void *fdt, size_t bufsize)
 	const char *propname;
 	bool expect_end = false;
 
+	if (can_assume(PERFECT))
+		return 0;
 	if (bufsize < FDT_V1_SIZE)
 		return -FDT_ERR_TRUNCATED;
 	if (bufsize < fdt_header_size(fdt))
-- 
2.43.0