diff options
| author | Leon Romanovsky <leonro@nvidia.com> | 2024-09-11 13:15:00 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2024-09-12 09:19:35 +0200 |
| commit | f45cfab28fcd5ac67a38750b6c68316b26d35ac8 (patch) | |
| tree | cc0ccc1423b62a758a9709ef502a3f15ad040ef5 /kernel/dma | |
| parent | 038eb433dc1474c4bc7d33188294e3d4778efdfd (diff) | |
dma-mapping: reliably inform about DMA support for IOMMU
If the DMA IOMMU path is going to be used, the appropriate check should
return that DMA is supported.
Fixes: b5c58b2fdc42 ("dma-mapping: direct calls for dma-iommu")
Closes: https://lore.kernel.org/all/181e06ff-35a3-434f-b505-672f430bd1cb@notapiano
Reported-by: Nícolas F. R. A. Prado <nfraprado@collabora.com> #KernelCI
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/mapping.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 7550b5dc5e55..022d670f8cad 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -843,6 +843,9 @@ static int dma_supported(struct device *dev, u64 mask) if (WARN_ON(ops && use_dma_iommu(dev))) return false; + + if (use_dma_iommu(dev)) + return true; /* * ->dma_supported sets the bypass flag, so we must always call * into the method here unless the device is truly direct mapped. |