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| author | Martin Oliveira <martin.oliveira@eideticom.com> | 2021-07-29 23:15:28 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-08-09 18:13:05 +0300 |
| commit | c4e0e892ab0579d4de3ca6d260d537fc16b39790 (patch) | |
| tree | 69ef7391f43f041cdfa079e10851a43a707a02b5 /arch/powerpc/platforms/pseries/vio.c | |
| parent | af82fe85665d49bdb72dba66cd57e3bf95b71895 (diff) | |
| download | linux-c4e0e892ab0579d4de3ca6d260d537fc16b39790.tar.xz | |
powerpc/iommu: return error code from .map_sg() ops
The .map_sg() op now expects an error code instead of zero on failure.
Propagate the error up if vio_dma_iommu_map_sg() fails.
ppc_iommu_map_sg() may fail either because of iommu_range_alloc() or
because of tbl->it_ops->set(). The former only supports returning an
error with DMA_MAPPING_ERROR and an examination of the latter indicates
that it may return arch-specific errors (for example,
tce_buildmulti_pSeriesLP()). Hence, coalesce all of those errors into
-EIO, per the documentation on dma_map_sgtable().
Signed-off-by: Martin Oliveira <martin.oliveira@eideticom.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Geoff Levand <geoff@infradead.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch/powerpc/platforms/pseries/vio.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/vio.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/platforms/pseries/vio.c b/arch/powerpc/platforms/pseries/vio.c index e00f3725ec96..e31e59c54f30 100644 --- a/arch/powerpc/platforms/pseries/vio.c +++ b/arch/powerpc/platforms/pseries/vio.c @@ -560,7 +560,8 @@ static int vio_dma_iommu_map_sg(struct device *dev, struct scatterlist *sglist, for_each_sg(sglist, sgl, nelems, count) alloc_size += roundup(sgl->length, IOMMU_PAGE_SIZE(tbl)); - if (vio_cmo_alloc(viodev, alloc_size)) + ret = vio_cmo_alloc(viodev, alloc_size); + if (ret) goto out_fail; ret = ppc_iommu_map_sg(dev, tbl, sglist, nelems, dma_get_mask(dev), direction, attrs); @@ -577,7 +578,7 @@ out_deallocate: vio_cmo_dealloc(viodev, alloc_size); out_fail: atomic_inc(&viodev->cmo.allocs_failed); - return 0; + return ret; } static void vio_dma_iommu_unmap_sg(struct device *dev, |