[BUG] silent hangup when debugging lib/fdtdec.c

[Alexander Feilke]

From: Alexander Feilke <alexander.feilke at ew.tq-group.com>

Description: U-Boot hangs silently during boot when enabling DEBUG in
lib/fdtdec.c

Not sure if its really a bug or rather a configuration issue on my side.

Minimal steps to reproduce: <see patch>

The hang is caused by `panic("FDT overlap");` later inside the if block.
(see `lib/fdtdec.c:1279` in `fdt_find_separate(void)`)

Additionally, no boot log can be seen because serial is initialized after
loading the devicetree in this boot stage (see `common/board_r.c:665` in
`initcall_run_r(void)`)

Tested on i.MX6 with configs for tqma6d_mba6 and other tq boards that aren't,
mainlined yet (tqma6ulx_mba6ul and tqma7d_mba7).

Any idea what to look for to fix this on our side?

Thanks in advance,
Alexander
---
 lib/fdtdec.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index c38738b48c7..0f2f7c948cd 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1257,7 +1257,7 @@ static void *fdt_find_separate(void)
 	/* FDT is at end of image */
 	fdt_blob = (ulong *)_end;
 
-	if (_DEBUG && !fdtdec_prepare_fdt(fdt_blob)) {
+	if (1 && !fdtdec_prepare_fdt(fdt_blob)) {
 		int stack_ptr;
 		const void *top = fdt_blob + fdt_totalsize(fdt_blob);
 
-- 
2.34.1