From 0d6ecb2e43d6b15699cea1fbd7ce0c981694b9b4 Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Mon, 14 Oct 2019 19:45:15 -0700 Subject: 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 Signed-off-by: Herbert Xu --- arch/powerpc/crypto/aes-spe-glue.c | 7 ------- 1 file changed, 7 deletions(-) (limited to 'arch/powerpc/crypto') 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; -- cgit v1.2.3