leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

crypto: ux500 - Use proper enum in cryp_set_dma_transfer

Browse Source 
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>
This commit is contained in:
Nathan Chancellor 2018-12-10 16:49:29 -07:00 committed by Herbert Xu
parent 603f8c3b0d
commit 9d880c5945
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/crypto/ux500/cryp/cryp_core.c
View File

@ -556,7 +556,7 @@ 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:
@ -580,7 +580,7 @@ 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);