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padata: make padata_do_parallel to return zero on success 

To return -EINPROGRESS on success in padata_do_parallel was
considered to be odd. This patch changes this to return zero
on success. Also the only user of padata, pcrypt is adapted to
convert a return of zero to -EINPROGRESS within the crypto layer.
This also removes the pcrypt fallback if padata_do_parallel
was called on a not running padata instance as we can't handle it
anymore. This fallback was unused, so it's save to remove it.

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Steffen Klassert 2010-07-07 15:32:02 +02:00 committed by Herbert Xu
parent 33e5445068
commit 83f619f3c8
2 changed files with 11 additions and 18 deletions
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18
crypto/pcrypt.c
View File

@ -143,10 +143,8 @@ static int pcrypt_aead_encrypt(struct aead_request *req)
aead_request_set_assoc(creq, req->assoc, req->assoclen);
err = pcrypt_do_parallel(padata, &ctx->cb_cpu, pcrypt_enc_padata);
if (err)
return err;
else
err = crypto_aead_encrypt(creq);
if (!err)
return -EINPROGRESS;
return err;
}
@ -187,10 +185,8 @@ static int pcrypt_aead_decrypt(struct aead_request *req)
aead_request_set_assoc(creq, req->assoc, req->assoclen);
err = pcrypt_do_parallel(padata, &ctx->cb_cpu, pcrypt_dec_padata);
if (err)
return err;
else
err = crypto_aead_decrypt(creq);
if (!err)
return -EINPROGRESS;
return err;
}
@ -233,10 +229,8 @@ static int pcrypt_aead_givencrypt(struct aead_givcrypt_request *req)
aead_givcrypt_set_giv(creq, req->giv, req->seq);
err = pcrypt_do_parallel(padata, &ctx->cb_cpu, pcrypt_enc_padata);
if (err)
return err;
else
err = crypto_aead_givencrypt(creq);
if (!err)
return -EINPROGRESS;
return err;
}

11
kernel/padata.c
View File

@ -111,10 +111,13 @@ int padata_do_parallel(struct padata_instance *pinst,
pd = rcu_dereference(pinst->pd);
err = 0;
err = -EINVAL;
if (!(pinst->flags & PADATA_INIT))
goto out;
if (!cpumask_test_cpu(cb_cpu, pd->cpumask))
goto out;
err = -EBUSY;
if ((pinst->flags & PADATA_RESET))
goto out;
@ -122,11 +125,7 @@ int padata_do_parallel(struct padata_instance *pinst,
if (atomic_read(&pd->refcnt) >= MAX_OBJ_NUM)
goto out;
err = -EINVAL;
if (!cpumask_test_cpu(cb_cpu, pd->cpumask))
goto out;
err = -EINPROGRESS;
err = 0;
atomic_inc(&pd->refcnt);
padata->pd = pd;
padata->cb_cpu = cb_cpu;