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crypto: powerpc - don't unnecessarily use atomic scatterwalk

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The PowerPC SPE implementations of AES modes only disable preemption
during the actual encryption/decryption, not during the scatterwalk
functions.  It's therefore unnecessary to request an atomic scatterwalk.
So don't do so.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Eric Biggers 2019-10-14 19:45:15 -07:00 • committed by Herbert Xu
parent 528282630c
commit 0d6ecb2e43
1 changed files with 0 additions and 7 deletions
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7
arch/powerpc/crypto/aes-spe-glue.c
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@ -186,7 +186,6 @@ static int ppc_ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
unsigned int ubytes;
int err;
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
@ -214,7 +213,6 @@ static int ppc_ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
unsigned int ubytes;
int err;
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
@ -242,7 +240,6 @@ static int ppc_cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
unsigned int ubytes;
int err;
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
@ -270,7 +267,6 @@ static int ppc_cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
unsigned int ubytes;
int err;
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
@ -298,7 +294,6 @@ static int ppc_ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst,
unsigned int pbytes, ubytes;
int err;
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt_block(desc, &walk, AES_BLOCK_SIZE);
@ -329,7 +324,6 @@ static int ppc_xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
int err;
u32 *twk;
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
twk = ctx->key_twk;
@ -360,7 +354,6 @@ static int ppc_xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst,
int err;
u32 *twk;
desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP;
blkcipher_walk_init(&walk, dst, src, nbytes);
err = blkcipher_walk_virt(desc, &walk);
twk = ctx->key_twk;