Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752791AbbH0Bxz (ORCPT ); Wed, 26 Aug 2015 21:53:55 -0400 Received: from mail-pa0-f45.google.com ([209.85.220.45]:33842 "EHLO mail-pa0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752159AbbH0Bxx (ORCPT ); Wed, 26 Aug 2015 21:53:53 -0400 Date: Thu, 27 Aug 2015 10:54:32 +0900 From: Sergey Senozhatsky To: Joonsoo Kim Cc: Andrew Morton , Minchan Kim , Nitin Gupta , Sergey Senozhatsky , linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, Herbert Xu , "David S. Miller" , Stephan Mueller , Joonsoo Kim Subject: Re: [PATCH v2 2/8] crypto/lzo: support decompress_noctx Message-ID: <20150827015432.GA1545@swordfish> References: <1440052504-15442-1-git-send-email-iamjoonsoo.kim@lge.com> <1440052504-15442-3-git-send-email-iamjoonsoo.kim@lge.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1440052504-15442-3-git-send-email-iamjoonsoo.kim@lge.com> User-Agent: Mutt/1.5.23+102 (2ca89bed6448) (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1784 Lines: 67 On (08/20/15 15:34), Joonsoo Kim wrote: > lzo's decompression doesn't requires any scratch buffer so > it doesn't need tfm context. Hence, it can support > crypto compression noctx API and this patch implements it. > > Signed-off-by: Joonsoo Kim > --- > crypto/lzo.c | 18 +++++++++++++++++- > 1 file changed, 17 insertions(+), 1 deletion(-) > > diff --git a/crypto/lzo.c b/crypto/lzo.c > index 9ca516b..f1844dd 100644 > --- a/crypto/lzo.c > +++ b/crypto/lzo.c > @@ -80,6 +80,22 @@ static int lzo_decompress(struct crypto_tfm *tfm, const u8 *src, > > } > > +static int lzo_decompress_noctx(const u8 *src, unsigned int slen, > + u8 *dst, unsigned int *dlen) > +{ > + int err; > + size_t tmp_len = *dlen; /* size_t(ulong) <-> uint on 64 bit */ > + > + err = lzo1x_decompress_safe(src, slen, dst, &tmp_len); > + > + if (err != LZO_E_OK) > + return -EINVAL; > + > + *dlen = tmp_len; > + return 0; > + just do static int lzo_decompress_noctx(const u8 *src, unsigned int slen, u8 *dst, unsigned int *dlen) { return lzo_decompress(NULL, src, len, dst, dlen); } ? -ss > +} > + > static struct crypto_alg alg = { > .cra_name = "lzo", > .cra_flags = CRYPTO_ALG_TYPE_COMPRESS, > @@ -91,7 +107,7 @@ static struct crypto_alg alg = { > .coa_compress = lzo_compress, > .coa_decompress = lzo_decompress, > .coa_compress_noctx = NULL, > - .coa_decompress_noctx = NULL } } > + .coa_decompress_noctx = lzo_decompress_noctx } } > }; > > static int __init lzo_mod_init(void) > -- > 1.9.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/