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| author | Christoph Hellwig <[email protected]> | 2021-11-09 14:47:56 +0000 |
|---|---|---|
| committer | Christoph Hellwig <[email protected]> | 2021-12-07 11:50:06 +0000 |
| commit | 955f58f7406ad912825fc344c7825fd904b124a0 (patch) | |
| tree | a23e035d3fd7886c708f7bb0937990e0d30267bd /Documentation/filesystems/caching/netfs-api.rst | |
| parent | dma-direct: refactor the !coherent checks in dma_direct_alloc (diff) | |
| download | kernel-955f58f7406ad912825fc344c7825fd904b124a0.tar.gz kernel-955f58f7406ad912825fc344c7825fd904b124a0.zip | |
dma-direct: fail allocations that can't be made coherent
If the architecture can't remap or set an address uncached there is no way
to fullfill a request for a coherent allocation. Return NULL in that case.
Note that this case currently does not happen, so this is a theoretical
fixup and/or a preparation for eventually supporting platforms that
can't support coherent allocations with the generic code.
Signed-off-by: Christoph Hellwig <[email protected]>
Reviewed-by: Robin Murphy <[email protected]>
Diffstat (limited to 'Documentation/filesystems/caching/netfs-api.rst')
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