[dm-devel] [PATCH] libmultipath: make vector_foreach_slot_backwards work as expected

[Benjamin Marzinski]

All of the code that uses vector_foreach_slot_backwards() treats "i" as
the index of the entry "p", but the way it was coded, that wasn't the
case. "i" was the number of the entry counting from 1, not 0.

Signed-off-by: Benjamin Marzinski <bmarzins at redhat.com>
---
 libmultipath/vector.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libmultipath/vector.h b/libmultipath/vector.h
index 41d2b896..344dffd5 100644
--- a/libmultipath/vector.h
+++ b/libmultipath/vector.h
@@ -40,7 +40,7 @@ typedef struct _vector *vector;
 #define vector_foreach_slot_after(v,p,i) \
 	for (; (v) && i < VECTOR_SIZE(v) && ((p) = (v)->slot[i]); i++)
 #define vector_foreach_slot_backwards(v,p,i) \
-	for (i = VECTOR_SIZE(v); i > 0 && ((p) = (v)->slot[i-1]); i--)
+	for (i = VECTOR_SIZE(v) - 1; (int)i >= 0 && ((p) = (v)->slot[i]); i--)
 
 #define identity(x) (x)
 /*
-- 
2.17.2