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dmaengine: Add a warning for drivers not using the generic slave caps retrieval

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For the slave caps retrieval to be really useful, most drivers need to
implement it.

Hence, we need to be slightly more aggressive, and trigger a warning at
registration time for drivers that don't fill their caps infos in order to
encourage them to implement it.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Maxime Ripard 2014-11-17 14:42:53 +01:00 committed by Vinod Koul
parent 1cac81b438
commit ecc19d1786
1 changed files with 3 additions and 0 deletions
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3
drivers/dma/dmaengine.c
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@ -826,6 +826,9 @@ int dma_async_device_register(struct dma_device *device)
BUG_ON(!device->device_issue_pending);
BUG_ON(!device->dev);
WARN(dma_has_cap(DMA_SLAVE, device->cap_mask) && !device->directions,
"this driver doesn't support generic slave capabilities reporting\n");
/* note: this only matters in the
* CONFIG_ASYNC_TX_ENABLE_CHANNEL_SWITCH=n case
*/