diff options
| author | Logan Gunthorpe <logang@deltatee.com> | 2022-07-08 10:50:55 -0600 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2022-07-26 07:27:47 -0400 |
| commit | 7c2645a2a30a45d3dc4c98b315a51be44ec69a67 (patch) | |
| tree | 118abe33b35e1492043c111a0605be050bb6acee /kernel/dma | |
| parent | 5e180ff326b43bd3fb72892e1083b2707159aa6e (diff) | |
| download | linux-7c2645a2a30a45d3dc4c98b315a51be44ec69a67.tar.bz2 | |
dma-mapping: allow EREMOTEIO return code for P2PDMA transfers
Add EREMOTEIO error return to dma_map_sgtable() which will be used
by .map_sg() implementations that detect P2PDMA pages that the
underlying DMA device cannot access.
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/mapping.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 1bfe11b1edb6..746d46825d08 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -197,7 +197,7 @@ static int __dma_map_sg_attrs(struct device *dev, struct scatterlist *sg, if (ents > 0) debug_dma_map_sg(dev, sg, nents, ents, dir, attrs); else if (WARN_ON_ONCE(ents != -EINVAL && ents != -ENOMEM && - ents != -EIO)) + ents != -EIO && ents != -EREMOTEIO)) return -EIO; return ents; @@ -255,6 +255,9 @@ EXPORT_SYMBOL(dma_map_sg_attrs); * complete the mapping. Should succeed if retried later. * -EIO Legacy error code with an unknown meaning. eg. this is * returned if a lower level call returned DMA_MAPPING_ERROR. + * -EREMOTEIO The DMA device cannot access P2PDMA memory specified in + * the sg_table. This will not succeed if retried. + * */ int dma_map_sgtable(struct device *dev, struct sg_table *sgt, enum dma_data_direction dir, unsigned long attrs) |