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dma-mapping: return error code from dma_dummy_map_sg()

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The .map_sg() op now expects an error code instead of zero on failure.

The only errno to return is -EINVAL in the case when DMA is not
supported.

Signed-off-by: Martin Oliveira <martin.oliveira@eideticom.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Martin Oliveira 2021-07-29 14:15:38 -06:00 committed by Christoph Hellwig
parent 183dc86335
commit 66ab63104f
1 changed files with 1 additions and 1 deletions
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2
kernel/dma/dummy.c
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@ -22,7 +22,7 @@ static int dma_dummy_map_sg(struct device *dev, struct scatterlist *sgl,
int nelems, enum dma_data_direction dir,
unsigned long attrs)
{
return 0;
return -EINVAL;
}
static int dma_dummy_supported(struct device *hwdev, u64 mask)