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

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

[Haavard Skinnemoen]

From: Haavard Skinnemoen <hskinnemoen@atmel.com>

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 <hskinnemoen@atmel.com>
---
 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

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

[Dan Williams]

On Wed, Jun 25, 2008 at 5:08 AM, Haavard Skinnemoen
<haavard.skinnemoen@atmel.com> wrote:
> From: Haavard Skinnemoen <hskinnemoen@atmel.com>
>
> 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 <hskinnemoen@atmel.com>
> ---

Thanks, applied to async_tx/next

--
Dan