[U-Boot] [PATCH V2 1/2] lib: fdt: Allow enabling both LZO and GZIP DT compression

[Marek Vasut]

Allow enabling both LZO and GZIP DT compression in SPL and fix a
bug where if the GZIP decompression failed, the LZO decompression
would not even be attempted.

Signed-off-by: Marek Vasut <marek.vasut+renesas at gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu at nigauri.org>
Cc: Simon Glass <sjg at chromium.org>
Cc: Tom Rini <trini at konsulko.com>
---
V2: Rebase on u-boot/master
---
 lib/fdtdec.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 79915b59bd..d5e8b5a420 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1183,16 +1183,21 @@ int fdtdec_setup_memory_banksize(void)
 static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
 {
 	size_t sz_out = CONFIG_SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ;
+	bool gzip = 0, lzo = 0;
 	ulong sz_in = sz_src;
 	void *dst;
 	int rc;
 
 	if (CONFIG_IS_ENABLED(GZIP))
-		if (gzip_parse_header(src, sz_in) < 0)
-			return -1;
+		if (gzip_parse_header(src, sz_in) >= 0)
+			gzip = 1;
 	if (CONFIG_IS_ENABLED(LZO))
-		if (!lzop_is_valid_header(src))
-			return -EBADMSG;
+		if (!gzip && lzop_is_valid_header(src))
+			lzo = 1;
+
+	if (!gzip && !lzo)
+		return -EBADMSG;
+
 
 	if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) {
 		dst = malloc(sz_out);
@@ -1208,10 +1213,12 @@ static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
 #  endif
 	}
 
-	if (CONFIG_IS_ENABLED(GZIP))
+	if (CONFIG_IS_ENABLED(GZIP) && gzip)
 		rc = gunzip(dst, sz_out, (u8 *)src, &sz_in);
-	else if (CONFIG_IS_ENABLED(LZO))
+	else if (CONFIG_IS_ENABLED(LZO) && lzo)
 		rc = lzop_decompress(src, sz_in, dst, &sz_out);
+	else
+		hang();
 
 	if (rc < 0) {
 		/* not a valid compressed blob */
-- 
2.20.1