This patch tries to preserve in-place processing in old_crypt as
various algorithms are optimised for in-place processing where
src == dst.
Signed-off-by: Herbert Xu <herb...@gondor.apana.org.au>
---
crypto/aead.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/crypto/aead.c b/crypto/aead.c
index 7c3d725..35c55e0 100644
--- a/crypto/aead.c
+++ b/crypto/aead.c
@@ -107,7 +107,8 @@ static int old_crypt(struct aead_request *req,
return crypt(req);
src = scatterwalk_ffwd(nreq->srcbuf, req->src, req->assoclen);
- dst = scatterwalk_ffwd(nreq->dstbuf, req->dst, req->assoclen);
+ dst = req->src == req->dst ?
+ src : scatterwalk_ffwd(nreq->dstbuf, req->dst, req->assoclen);
aead_request_set_tfm(&nreq->subreq, aead);
aead_request_set_callback(&nreq->subreq, aead_request_flags(req),
--
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