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authorEric Biggers <ebiggers@google.com>2019-10-14 19:45:15 -0700
committerHerbert Xu <herbert@gondor.apana.org.au>2019-10-26 02:06:06 +1100
commit0d6ecb2e43d6b15699cea1fbd7ce0c981694b9b4 (patch)
tree76c9831d333317f84f64223a5545f0dfede3cb6e /arch/powerpc/crypto
parent528282630ca961d6284f68f5f2f0057c86873bb6 (diff)
crypto: powerpc - don't unnecessarily use atomic scatterwalk
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>
Diffstat (limited to 'arch/powerpc/crypto')
-rw-r--r--arch/powerpc/crypto/aes-spe-glue.c7
1 files changed, 0 insertions, 7 deletions
diff --git a/arch/powerpc/crypto/aes-spe-glue.c b/arch/powerpc/crypto/aes-spe-glue.c
index 3a4ca7d32477..319f1dbb3a70 100644
--- a/arch/powerpc/crypto/aes-spe-glue.c
+++ b/arch/powerpc/crypto/aes-spe-glue.c
@@ -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;