[PATCH 3/11] crypto: aead - Preserve in-place processing in old_crypt
From: Herbert Xu <herbert@gondor.apana.org.au>
Date: 2015-05-27 06:37:32
Subsystem:
crypto api, the rest · Maintainers:
Herbert Xu, "David S. Miller", Linus Torvalds
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 <herbert@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),