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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2016-07-12 13:17:55 +0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-07-18 17:35:48 +0800 |
| commit | 85eccddee401ae81067e763516889780b5545160 (patch) | |
| tree | 2ed2c98edfbe965640dd75a73bdabce37e4479c7 | |
| parent | 5506f53c7cc17c4ad5e69e5512a35faf77182986 (diff) | |
| download | linux-85eccddee401ae81067e763516889780b5545160.tar.bz2 | |
crypto: scatterwalk - Add no-copy support to copychunks
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@gondor.apana.org.au>
| -rw-r--r-- | crypto/scatterwalk.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/crypto/scatterwalk.c b/crypto/scatterwalk.c index 03ca4aef1b9d..e124ce26feed 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); |