* [PATCH] dmaengine: ste_dma40: fix implicit conversion
@ 2015-03-21 23:51 Stefan Agner
2015-04-01 3:40 ` Vinod Koul
0 siblings, 1 reply; 2+ messages in thread
From: Stefan Agner @ 2015-03-21 23:51 UTC (permalink / raw)
To: linus.walleij, vinod.koul
Cc: dan.j.williams, dmaengine, linux-arm-kernel, linux-kernel,
llvmlinux, Stefan Agner
The function d40_prep_sg takes the type enum dma_transfer_direction
as second last parameter. However, the memcpy calls pass DMA_NONE
which is of type enum dma_data_direction. Fix this by passing the
actual transfer direction DMA_MEM_TO_MEM.
This does not change the actual code flow since only the transfer
direction DMA_MEM_TO_DEV and DMA_DEV_TO_MEM are actually used in the
function d40_prep_sg.
Signed-off-by: Stefan Agner <stefan@agner.ch>
---
This was uncovered by a LLVM/clang warnings:
drivers/dma/ste_dma40.c:2505:48: warning: implicit conversion from enumeration type 'enum dma_data_direction' to different enumeration type 'enum dma_transfer_direction'
[-Wenum-conversion]
return d40_prep_sg(chan, &src_sg, &dst_sg, 1, DMA_NONE, dma_flags);
~~~~~~~~~~~ ^~~~~~~~
drivers/dma/ste_dma40.c:2517:54: warning: implicit conversion from enumeration type 'enum dma_data_direction' to different enumeration type 'enum dma_transfer_direction'
[-Wenum-conversion]
return d40_prep_sg(chan, src_sg, dst_sg, src_nents, DMA_NONE, dma_flags);
~~~~~~~~~~~ ^~~~~~~~
drivers/dma/ste_dma40.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/dma/ste_dma40.c b/drivers/dma/ste_dma40.c
index 15d4946..ace03dc 100644
--- a/drivers/dma/ste_dma40.c
+++ b/drivers/dma/ste_dma40.c
@@ -2502,7 +2502,8 @@ static struct dma_async_tx_descriptor *d40_prep_memcpy(struct dma_chan *chan,
sg_dma_len(&dst_sg) = size;
sg_dma_len(&src_sg) = size;
- return d40_prep_sg(chan, &src_sg, &dst_sg, 1, DMA_NONE, dma_flags);
+ return d40_prep_sg(chan, &src_sg, &dst_sg, 1,
+ DMA_MEM_TO_MEM, dma_flags);
}
static struct dma_async_tx_descriptor *
@@ -2514,7 +2515,8 @@ d40_prep_memcpy_sg(struct dma_chan *chan,
if (dst_nents != src_nents)
return NULL;
- return d40_prep_sg(chan, src_sg, dst_sg, src_nents, DMA_NONE, dma_flags);
+ return d40_prep_sg(chan, src_sg, dst_sg, src_nents,
+ DMA_MEM_TO_MEM, dma_flags);
}
static struct dma_async_tx_descriptor *
--
2.3.3
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] dmaengine: ste_dma40: fix implicit conversion
2015-03-21 23:51 [PATCH] dmaengine: ste_dma40: fix implicit conversion Stefan Agner
@ 2015-04-01 3:40 ` Vinod Koul
0 siblings, 0 replies; 2+ messages in thread
From: Vinod Koul @ 2015-04-01 3:40 UTC (permalink / raw)
To: Stefan Agner
Cc: linus.walleij, dan.j.williams, dmaengine, linux-arm-kernel,
linux-kernel, llvmlinux
On Sun, Mar 22, 2015 at 12:51:08AM +0100, Stefan Agner wrote:
> The function d40_prep_sg takes the type enum dma_transfer_direction
> as second last parameter. However, the memcpy calls pass DMA_NONE
> which is of type enum dma_data_direction. Fix this by passing the
> actual transfer direction DMA_MEM_TO_MEM.
>
> This does not change the actual code flow since only the transfer
> direction DMA_MEM_TO_DEV and DMA_DEV_TO_MEM are actually used in the
> function d40_prep_sg.
Applied, now
--
~Vinod
^ permalink raw reply [flat|nested] 2+ messages in thread
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