Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/djbw/async_tx

[safe/jmp/linux-2.6] / crypto / scatterwalk.c

diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index 12d1901..9aeeb52 100644 (file)
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -61,7 +61,7 @@ static void scatterwalk_pagedone(struct scatter_walk *walk, int out,
                walk->offset += PAGE_SIZE - 1;
                walk->offset &= PAGE_MASK;
                if (walk->offset >= walk->sg->offset + walk->sg->length)
-                       scatterwalk_start(walk, sg_next(walk->sg));
+                       scatterwalk_start(walk, scatterwalk_sg_next(walk->sg));
        }
 }
 
@@ -105,6 +105,9 @@ void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg,
        struct scatter_walk walk;
        unsigned int offset = 0;
 
+       if (!nbytes)
+               return;
+
        for (;;) {
                scatterwalk_start(&walk, sg);
 
@@ -112,7 +115,7 @@ void scatterwalk_map_and_copy(void *buf, struct scatterlist *sg,
                        break;
 
                offset += sg->length;
-               sg = sg_next(sg);
+               sg = scatterwalk_sg_next(sg);
        }
 
        scatterwalk_advance(&walk, start - offset);