[PATCH] crypto: sahara

* [PATCH] crypto: sahara - Fix dma unmap direction
@ 2017-08-03 13:34 Mogens Lauridsen
  2017-08-17  9:00 ` Herbert Xu
  0 siblings, 1 reply; 2+ messages in thread
From: Mogens Lauridsen @ 2017-08-03 13:34 UTC (permalink / raw)
  To: herbert; +Cc: linux-crypto, Mogens Lauridsen

The direction used in dma_unmap_sg in aes calc is wrong.
This result in the cache not being invalidated correct when aes
calculation is done and result has been dma'ed to memory.
This is seen as sporadic wrong result from aes calc.

Signed-off-by: Mogens Lauridsen <mlauridsen171@gmail.com>
---
 drivers/crypto/sahara.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/crypto/sahara.c b/drivers/crypto/sahara.c
index c2174ec88e2a..474da36bdd2c 100644
--- a/drivers/crypto/sahara.c
+++ b/drivers/crypto/sahara.c
@@ -543,10 +543,10 @@ static int sahara_hw_descriptor_create(struct sahara_dev *dev)
 
 unmap_out:
 	dma_unmap_sg(dev->device, dev->out_sg, dev->nb_out_sg,
-		DMA_TO_DEVICE);
+		DMA_FROM_DEVICE);
 unmap_in:
 	dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg,
-		DMA_FROM_DEVICE);
+		DMA_TO_DEVICE);
 
 	return -EINVAL;
 }
@@ -594,9 +594,9 @@ static int sahara_aes_process(struct ablkcipher_request *req)
 	}
 
 	dma_unmap_sg(dev->device, dev->out_sg, dev->nb_out_sg,
-		DMA_TO_DEVICE);
-	dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg,
 		DMA_FROM_DEVICE);
+	dma_unmap_sg(dev->device, dev->in_sg, dev->nb_in_sg,
+		DMA_TO_DEVICE);
 
 	return 0;
 }
-- 
2.13.4

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