Commit 0d6ecb2e authored by Eric Biggers's avatar Eric Biggers Committed by Herbert Xu
Browse files

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: default avatarEric Biggers <ebiggers@google.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 52828263

arch/powerpc/crypto/aes-spe-glue.c

+0 −7
Original line number Diff line number Diff line
@@ -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;

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