diff options
| author | Cyrille Pitchen <cyrille.pitchen@atmel.com> | 2015-12-17 17:48:45 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2015-12-23 11:19:54 +0100 |
| commit | 820599a0ea5f99112322011021e637c40f0048db (patch) | |
| tree | 378fc296dd15238ff55b5d1fb779ad0529d19d54 /drivers/crypto | |
| parent | crypto: atmel-aes - reduce latency of DMA completion (diff) | |
| download | linux-820599a0ea5f99112322011021e637c40f0048db.tar.xz linux-820599a0ea5f99112322011021e637c40f0048db.zip | |
crypto: atmel-aes - remove useless AES_FLAGS_DMA flag
Since the 'done' task code was split into atmel_aes_cpu_complete() and
atmel_aes_dma_complete(), the AES_FLAGS_DMA flag has become useless.
Signed-off-by: Cyrille Pitchen <cyrille.pitchen@atmel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
| -rw-r--r-- | drivers/crypto/atmel-aes.c | 37 |
1 files changed, 15 insertions, 22 deletions
diff --git a/drivers/crypto/atmel-aes.c b/drivers/crypto/atmel-aes.c index 8a2b3e81c087..68e4177ad61b 100644 --- a/drivers/crypto/atmel-aes.c +++ b/drivers/crypto/atmel-aes.c @@ -66,7 +66,6 @@ #define AES_FLAGS_INIT BIT(2) #define AES_FLAGS_BUSY BIT(3) -#define AES_FLAGS_DMA BIT(4) #define AES_FLAGS_FAST BIT(5) #define AES_FLAGS_PERSISTENT (AES_FLAGS_INIT | AES_FLAGS_BUSY) @@ -393,8 +392,6 @@ static int atmel_aes_crypt_dma(struct atmel_aes_dev *dd, dmaengine_slave_config(dd->dma_lch_in.chan, &dd->dma_lch_in.dma_conf); dmaengine_slave_config(dd->dma_lch_out.chan, &dd->dma_lch_out.dma_conf); - dd->flags |= AES_FLAGS_DMA; - sg_init_table(&sg[0], 1); sg_dma_address(&sg[0]) = dma_addr_in; sg_dma_len(&sg[0]) = length; @@ -433,8 +430,6 @@ static int atmel_aes_crypt_cpu_start(struct atmel_aes_dev *dd) { struct ablkcipher_request *req = ablkcipher_request_cast(dd->areq); - dd->flags &= ~AES_FLAGS_DMA; - dma_sync_single_for_cpu(dd->dev, dd->dma_addr_in, dd->dma_size, DMA_TO_DEVICE); dma_sync_single_for_cpu(dd->dev, dd->dma_addr_out, @@ -642,25 +637,23 @@ static int atmel_aes_start(struct atmel_aes_dev *dd) static int atmel_aes_crypt_dma_stop(struct atmel_aes_dev *dd) { - int err = -EINVAL; + int err = 0; size_t count; - if (dd->flags & AES_FLAGS_DMA) { - err = 0; - if (dd->flags & AES_FLAGS_FAST) { - dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); - dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); - } else { - dma_sync_single_for_cpu(dd->dev, dd->dma_addr_out, - dd->dma_size, DMA_FROM_DEVICE); - - /* copy data */ - count = atmel_aes_sg_copy(&dd->out_sg, &dd->out_offset, - dd->buf_out, dd->buflen, dd->dma_size, 1); - if (count != dd->dma_size) { - err = -EINVAL; - pr_err("not all data converted: %zu\n", count); - } + if (dd->flags & AES_FLAGS_FAST) { + dma_unmap_sg(dd->dev, dd->out_sg, 1, DMA_FROM_DEVICE); + dma_unmap_sg(dd->dev, dd->in_sg, 1, DMA_TO_DEVICE); + } else { + dma_sync_single_for_cpu(dd->dev, dd->dma_addr_out, + dd->dma_size, DMA_FROM_DEVICE); + + /* copy data */ + count = atmel_aes_sg_copy(&dd->out_sg, &dd->out_offset, + dd->buf_out, dd->buflen, + dd->dma_size, 1); + if (count != dd->dma_size) { + err = -EINVAL; + pr_err("not all data converted: %zu\n", count); } } |