AuxXxilium/linux_dsm_epyc7002
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dmaengine: Couple DMA channels to their physical DMA device

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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>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Haavard Skinnemoen 2008-07-08 11:58:05 -07:00 committed by Dan Williams
parent 65bc3ffe8c
commit 1099dc7924
1 changed files with 1 additions and 1 deletions
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2
drivers/dma/dmaengine.c
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@ -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);