[PATCH] maple_tree: Fix mas_empty_area() wrapping

[Liam Howlett]

Set the error code correctly when at the left most node and search has
been exhausted.  This was an overflow bug.

Reported-by: Sven Schnelle <svens at linux.ibm.com>
Signed-off-by: Liam R. Howlett <Liam.Howlett at oracle.com>
---
 lib/maple_tree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/maple_tree.c b/lib/maple_tree.c
index 1b8130f19c2e..0c0bda979693 100644
--- a/lib/maple_tree.c
+++ b/lib/maple_tree.c
@@ -4994,7 +4994,7 @@ static inline bool mas_anode_descend(struct ma_state *mas, unsigned long size)
 		}
 next_slot:
 		min = pivot + 1;
-		if (mas->last < min) {
+		if (mas->last <= pivot) {
 			mas_set_err(mas, -EBUSY);
 			return true;
 		}
-- 
2.35.1