[PATCH 14/24] crypto: atmel-aes: remove useless AES_FLAGS_DMA flag

[Cyrille Pitchen]

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.pitc...@atmel.com>
---
 drivers/crypto/atmel-aes.c | 37 +++++++++++++++----------------------
 1 file 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);
                }
        }
 
-- 
1.8.2.2

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