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

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>
hifive-unleashed-5.1
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
*/