The function ablkcipher_done_slow is pretty much identical to
scatterwalk_copychunks except that it doesn't actually copy as
the processing hasn't been completed yet.
This patch allows scatterwalk_copychunks to be used in this case
by specifying out == 2.
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
---
crypto/scatterwalk.c | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c
index 03ca4ae..e124ce2 100644
--- a/crypto/scatterwalk.c
+++ b/crypto/scatterwalk.c
@@ -87,9 +87,11 @@ void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
if (len_this_page > nbytes)
len_this_page = nbytes;
- vaddr = scatterwalk_map(walk);
- memcpy_dir(buf, vaddr, len_this_page, out);
- scatterwalk_unmap(vaddr);
+ if (out != 2) {
+ vaddr = scatterwalk_map(walk);
+ memcpy_dir(buf, vaddr, len_this_page, out);
+ scatterwalk_unmap(vaddr);
+ }
scatterwalk_advance(walk, len_this_page);
@@ -99,7 +101,7 @@ void scatterwalk_copychunks(void *buf, struct scatter_walk *walk,
buf += len_this_page;
nbytes -= len_this_page;
- scatterwalk_pagedone(walk, out, 1);
+ scatterwalk_pagedone(walk, out & 1, 1);
}
}
EXPORT_SYMBOL_GPL(scatterwalk_copychunks);
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