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crypto: chelsio - Remove dst sg size zero check

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sg_nents_xlen will take care of zero length sg list.
Remove Destination sg list size zero check.

Signed-off-by: Harsh Jain <harsh@chelsio.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Harsh Jain 2018-01-11 16:45:52 +05:30 committed by Herbert Xu
parent 3d64bd6702
commit e1a018e607
1 changed files with 13 additions and 30 deletions
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43
drivers/crypto/chelsio/chcr_algo.c
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@ -2109,20 +2109,14 @@ static struct sk_buff *create_authenc_wr(struct aead_request *req,
null = 1;
assoclen = 0;
}
dst_size = assoclen + req->cryptlen + (op_type ? -authsize :
authsize);
error = chcr_aead_common_init(req, op_type);
if (error)
return ERR_PTR(error);
if (dst_size) {
dnents = sg_nents_xlen(req->dst, assoclen, CHCR_DST_SG_SIZE, 0);
dnents += sg_nents_xlen(req->dst, req->cryptlen +
(op_type ? -authsize : authsize), CHCR_DST_SG_SIZE,
req->assoclen);
dnents += MIN_AUTH_SG; // For IV
} else {
dnents = 0;
}
dst_size = get_space_for_phys_dsgl(dnents);
kctx_len = (ntohl(KEY_CONTEXT_CTX_LEN_V(aeadctx->key_ctx_hdr)) << 4)
@ -2687,8 +2681,6 @@ static struct sk_buff *create_aead_ccm_wr(struct aead_request *req,
sub_type = get_aead_subtype(tfm);
if (sub_type == CRYPTO_ALG_SUB_TYPE_AEAD_RFC4309)
assoclen -= 8;
dst_size = assoclen + req->cryptlen + (op_type ? -authsize :
authsize);
error = chcr_aead_common_init(req, op_type);
if (error)
return ERR_PTR(error);
@ -2698,15 +2690,11 @@ static struct sk_buff *create_aead_ccm_wr(struct aead_request *req,
error = aead_ccm_validate_input(op_type, req, aeadctx, sub_type);
if (error)
goto err;
if (dst_size) {
dnents = sg_nents_xlen(req->dst, assoclen, CHCR_DST_SG_SIZE, 0);
dnents += sg_nents_xlen(req->dst, req->cryptlen
+ (op_type ? -authsize : authsize),
CHCR_DST_SG_SIZE, req->assoclen);
dnents += MIN_CCM_SG; // For IV and B0
} else {
dnents = 0;
}
dnents = sg_nents_xlen(req->dst, assoclen, CHCR_DST_SG_SIZE, 0);
dnents += sg_nents_xlen(req->dst, req->cryptlen
+ (op_type ? -authsize : authsize),
CHCR_DST_SG_SIZE, req->assoclen);
dnents += MIN_CCM_SG; // For IV and B0
dst_size = get_space_for_phys_dsgl(dnents);
kctx_len = ((DIV_ROUND_UP(aeadctx->enckey_len, 16)) << 4) * 2;
transhdr_len = CIPHER_TRANSHDR_SIZE(kctx_len, dst_size);
@ -2801,19 +2789,14 @@ static struct sk_buff *create_gcm_wr(struct aead_request *req,
assoclen = req->assoclen - 8;
reqctx->b0_dma = 0;
dst_size = assoclen + req->cryptlen + (op_type ? -authsize : authsize);
error = chcr_aead_common_init(req, op_type);
if (error)
return ERR_PTR(error);
if (dst_size) {
dnents = sg_nents_xlen(req->dst, assoclen, CHCR_DST_SG_SIZE, 0);
dnents += sg_nents_xlen(req->dst,
req->cryptlen + (op_type ? -authsize : authsize),
if (error)
return ERR_PTR(error);
dnents = sg_nents_xlen(req->dst, assoclen, CHCR_DST_SG_SIZE, 0);
dnents += sg_nents_xlen(req->dst, req->cryptlen +
(op_type ? -authsize : authsize),
CHCR_DST_SG_SIZE, req->assoclen);
dnents += MIN_GCM_SG; // For IV
} else {
dnents = 0;
}
dnents += MIN_GCM_SG; // For IV
dst_size = get_space_for_phys_dsgl(dnents);
kctx_len = ((DIV_ROUND_UP(aeadctx->enckey_len, 16)) << 4) +
AEAD_H_SIZE;
@ -2850,10 +2833,10 @@ static struct sk_buff *create_gcm_wr(struct aead_request *req,
chcr_req->sec_cpl.aadstart_cipherstop_hi = FILL_SEC_CPL_CIPHERSTOP_HI(
assoclen ? 1 : 0, assoclen,
assoclen + IV + 1, 0);
chcr_req->sec_cpl.cipherstop_lo_authinsert =
chcr_req->sec_cpl.cipherstop_lo_authinsert =
FILL_SEC_CPL_AUTHINSERT(0, assoclen + IV + 1,
temp, temp);
chcr_req->sec_cpl.seqno_numivs =
chcr_req->sec_cpl.seqno_numivs =
FILL_SEC_CPL_SCMD0_SEQNO(op_type, (op_type ==
CHCR_ENCRYPT_OP) ? 1 : 0,
CHCR_SCMD_CIPHER_MODE_AES_GCM,