[PATCH AUTOSEL 4.4 66/80] crypto: ux500 - Use proper enum in cryp_set_dma_transfer

[PATCH AUTOSEL 4.4 66/80] crypto: ux500 - Use proper enum in cryp_set_dma_transfer

[Sasha Levin]

From: Nathan Chancellor <natechancellor@gmail.com>

[ Upstream commit 9d880c5945c748d8edcac30965f3349a602158c4 ]

Clang warns when one enumerated type is implicitly converted to another:

drivers/crypto/ux500/cryp/cryp_core.c:559:5: warning: implicit
conversion from enumeration type 'enum dma_data_direction' to different
enumeration type 'enum dma_transfer_direction' [-Wenum-conversion]
                                direction, DMA_CTRL_ACK);
                                ^~~~~~~~~
drivers/crypto/ux500/cryp/cryp_core.c:583:5: warning: implicit
conversion from enumeration type 'enum dma_data_direction' to different
enumeration type 'enum dma_transfer_direction' [-Wenum-conversion]
                                direction,
                                ^~~~~~~~~
2 warnings generated.

dmaengine_prep_slave_sg expects an enum from dma_transfer_direction.
Because we know the value of the dma_data_direction enum from the
switch statement, we can just use the proper value from
dma_transfer_direction so there is no more conversion.

DMA_TO_DEVICE = DMA_MEM_TO_DEV = 1
DMA_FROM_DEVICE = DMA_DEV_TO_MEM = 2

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/crypto/ux500/cryp/cryp_core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/crypto/ux500/cryp/cryp_core.c b/drivers/crypto/ux500/cryp/cryp_core.c
index 790f7cadc1ed..efebc484e371 100644
--- a/drivers/crypto/ux500/cryp/cryp_core.c
+++ b/drivers/crypto/ux500/cryp/cryp_core.c
@@ -555,7 +555,7 @@ static int cryp_set_dma_transfer(struct cryp_ctx *ctx,
 		desc = dmaengine_prep_slave_sg(channel,
 				ctx->device->dma.sg_src,
 				ctx->device->dma.sg_src_len,
-				direction, DMA_CTRL_ACK);
+				DMA_MEM_TO_DEV, DMA_CTRL_ACK);
 		break;
 
 	case DMA_FROM_DEVICE:
@@ -579,7 +579,7 @@ static int cryp_set_dma_transfer(struct cryp_ctx *ctx,
 		desc = dmaengine_prep_slave_sg(channel,
 				ctx->device->dma.sg_dst,
 				ctx->device->dma.sg_dst_len,
-				direction,
+				DMA_DEV_TO_MEM,
 				DMA_CTRL_ACK |
 				DMA_PREP_INTERRUPT);
 
-- 
2.19.1

[PATCH AUTOSEL 4.4 67/80] crypto: ux500 - Use proper enum in hash_set_dma_transfer

[Sasha Levin]

From: Nathan Chancellor <natechancellor@gmail.com>

[ Upstream commit 5ac93f808338f4dd465402e91869702eb87db241 ]

Clang warns when one enumerated type is implicitly converted to another:

drivers/crypto/ux500/hash/hash_core.c:169:4: warning: implicit
conversion from enumeration type 'enum dma_data_direction' to different
enumeration type 'enum dma_transfer_direction' [-Wenum-conversion]
                        direction, DMA_CTRL_ACK | DMA_PREP_INTERRUPT);
                        ^~~~~~~~~
1 warning generated.

dmaengine_prep_slave_sg expects an enum from dma_transfer_direction.
We know that the only direction supported by this function is
DMA_TO_DEVICE because of the check at the top of this function so we can
just use the equivalent value from dma_transfer_direction.

DMA_TO_DEVICE = DMA_MEM_TO_DEV = 1

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/crypto/ux500/hash/hash_core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/ux500/hash/hash_core.c b/drivers/crypto/ux500/hash/hash_core.c
index cd4398498495..bca6b701c067 100644
--- a/drivers/crypto/ux500/hash/hash_core.c
+++ b/drivers/crypto/ux500/hash/hash_core.c
@@ -181,7 +181,7 @@ static int hash_set_dma_transfer(struct hash_ctx *ctx, struct scatterlist *sg,
 		__func__);
 	desc = dmaengine_prep_slave_sg(channel,
 			ctx->device->dma.sg, ctx->device->dma.sg_len,
-			direction, DMA_CTRL_ACK | DMA_PREP_INTERRUPT);
+			DMA_MEM_TO_DEV, DMA_CTRL_ACK | DMA_PREP_INTERRUPT);
 	if (!desc) {
 		dev_err(ctx->device->dev,
 			"%s: dmaengine_prep_slave_sg() failed!\n", __func__);
-- 
2.19.1