lmb: Treat a region which is a subset as equal
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>
diff --git a/lib/lmb.c b/lib/lmb.c
index f447c63..2444b2a 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -247,8 +247,10 @@
phys_addr_t rgnbase = rgn->region[i].base;
phys_size_t rgnsize = rgn->region[i].size;
phys_size_t rgnflags = rgn->region[i].flags;
+ phys_addr_t end = base + size - 1;
+ phys_addr_t rgnend = rgnbase + rgnsize - 1;
- if (rgnbase == base && rgnsize == size) {
+ if (rgnbase <= base && end <= rgnend) {
if (flags == rgnflags)
/* Already have this region, so we're done */
return 0;