[U-Boot] [PATCH 1/4] lib: lmb: reserving overlapping regions should fail

[Simon Goldschmidt]

lmb_add_region handles overlapping regions wrong: instead of merging
or rejecting to add a new reserved region that overlaps an existing
one, it just adds the new region.

Since internally the same function is used for lmb_alloc, change
lmb_add_region to reject overlapping regions.

Signed-off-by: Simon Goldschmidt <simon.k.r.goldschmidt at gmail.com>
---

 lib/lmb.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/lmb.c b/lib/lmb.c
index 1705417348..8dc703d996 100644
--- a/lib/lmb.c
+++ b/lib/lmb.c
@@ -136,6 +136,9 @@ static long lmb_add_region(struct lmb_region *rgn, phys_addr_t base, phys_size_t
 			rgn->region[i].size += size;
 			coalesced++;
 			break;
+		} else if (lmb_addrs_overlap(base, size, rgnbase, rgnsize)) {
+			/* regions overlap */
+			return -1;
 		}
 	}
 
-- 
2.17.1