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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2015-05-27 14:37:29 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-05-28 11:23:17 +0800 |
| commit | b455eb80f17471797ba9cb904fe86af1df35f073 (patch) | |
| tree | eb75097755e27c5b2e6c65a529eee3be0f9a7ad3 /crypto/aead.c | |
| parent | fdaef75f66bba5999a94f3cd9156bf353ba2ef98 (diff) | |
| download | lwn-b455eb80f17471797ba9cb904fe86af1df35f073.tar.gz lwn-b455eb80f17471797ba9cb904fe86af1df35f073.zip | |
crypto: aead - Preserve in-place processing in old_crypt
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>
Diffstat (limited to 'crypto/aead.c')
| -rw-r--r-- | crypto/aead.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/crypto/aead.c b/crypto/aead.c index 7c3d725bd264..35c55e04fcbc 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), |