[PATCH 3/3] lmb: Treat a region which is a subset as equal

[Sjoerd Simons <sjoerd@collabora.com>]

In various cases logical memory blocks are coalesced; As a result doing
a strict check whether memory blocks are the same doesn't necessarily
work as a previous addition of a given block might have been merged into
a bigger block.

Fix this by considering a block is already registered if it's a pure
subset of one of the existing blocks.

Signed-off-by: Sjoerd Simons <sjoerd@collabora.com>

---

 lib/lmb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/lmb.c b/lib/lmb.c
index f447c639a60..b09a043f4c2 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -248,7 +248,7 @@ static long lmb_add_region_flags(struct lmb_region *rgn, phys_addr_t base,
 		phys_size_t rgnsize = rgn->region[i].size;
 		phys_size_t rgnflags = rgn->region[i].flags;
 
-		if (rgnbase == base && rgnsize == size) {
+		if (rgnbase <= base && rgnbase + rgnsize >= base + size) {
 			if (flags == rgnflags)
 				/* Already have this region, so we're done */
 				return 0;
-- 
2.39.0