2008-06-25 12:09:00

by Haavard Skinnemoen

Subject: [PATCH] dmaengine: Couple DMA channels to their physical DMA device

From: Haavard Skinnemoen <[email protected]>

Set the 'parent' field of channel class devices to point to the
physical DMA device initialized by the DMA engine driver.

This allows drivers to use chan->dev.parent for syncing DMA buffers
and adds a 'device' symlink to the real device in
/sys/class/dma/dmaXchanY.

Signed-off-by: Haavard Skinnemoen <[email protected]>
---
drivers/dma/dmaengine.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/dma/dmaengine.c b/drivers/dma/dmaengine.c
index 97b329e..99c22b4 100644
--- a/drivers/dma/dmaengine.c
+++ b/drivers/dma/dmaengine.c
@@ -378,7 +378,7 @@ int dma_async_device_register(struct dma_device *device)

chan->chan_id = chancnt++;
chan->dev.class = &dma_devclass;
- chan->dev.parent = NULL;
+ chan->dev.parent = device->dev;
snprintf(chan->dev.bus_id, BUS_ID_SIZE, "dma%dchan%d",
device->dev_id, chan->chan_id);

--
1.5.5.4

2008-06-25 18:11:57

by Dan Williams

Subject: Re: [PATCH] dmaengine: Couple DMA channels to their physical DMA device

On Wed, Jun 25, 2008 at 5:08 AM, Haavard Skinnemoen
<[email protected]> wrote:
> From: Haavard Skinnemoen <[email protected]>
>
> Set the 'parent' field of channel class devices to point to the
> physical DMA device initialized by the DMA engine driver.
>
> This allows drivers to use chan->dev.parent for syncing DMA buffers
> and adds a 'device' symlink to the real device in
> /sys/class/dma/dmaXchanY.
>
> Signed-off-by: Haavard Skinnemoen <[email protected]>
> ---

Thanks, applied to async_tx/next

--
Dan