[PATCH 1/2] lib: scatterlist: Fix loop termination condition in sg_calculate_split()

[Alexander Egorenkov]

nb_splits was decremented one time too much becoming negative. This
leads to the failure of the loop termination conditions which checks
only for nb_splits being zero. Move the loop termination condition
a couple of lines up before nb_splits is decremented again and potentially
becomes negative.

Signed-off-by: Alexander Egorenkov <egorenar-...@posteo.net>
---
 lib/sg_split.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/lib/sg_split.c b/lib/sg_split.c
index 3d9b32084d78..0920affd12ee 100644
--- a/lib/sg_split.c
+++ b/lib/sg_split.c
@@ -60,15 +60,16 @@ static int sg_calculate_split(struct scatterlist *in, int 
nents, int nb_splits,
                        curr->length_last_sg = len;
                        size -= len;
                }
-               skip = 0;
-
-               if (!size && --nb_splits > 0) {
-                       curr++;
-                       size = *(++sizes);
-               }
 
                if (!nb_splits)
                        break;
+
+               skip = 0;
+
+               if (!size && --nb_splits > 0) {
+                       curr++;
+                       size = *(++sizes);
+               }
        }
 
        return (size || !splitters[0].in_sg0) ? -EINVAL : 0;
-- 
2.31.1