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iommu/io-pgtable: Improve documentation of .map_sg callback

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The return value of the .map_sg callback is currently undocumented.
Document it.

Change-Id: I195cbfb78eaf173d916dd03190f89b2fe04e144e
Signed-off-by: Mitchel Humpherys <mitchelh@codeaurora.org>
This commit is contained in:
Mitchel Humpherys 2015-09-30 14:22:39 -07:00 • committed by David Keitel
parent 8387b734ea
commit b6d3fe2204
1 changed files with 2 additions and 1 deletions
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3
drivers/iommu/io-pgtable.h
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@ -77,7 +77,8 @@ struct io_pgtable_cfg {
* struct io_pgtable_ops - Page table manipulation API for IOMMU drivers.
*
* @map: Map a physically contiguous memory region.
* @map_sg: Map a scatterlist. The size parameter contains the size
* @map_sg: Map a scatterlist. Returns the number of bytes mapped,
* or 0 on failure. The size parameter contains the size
* of the partial mapping in case of failure.
* @unmap: Unmap a physically contiguous memory region.
* @iova_to_phys: Translate iova to physical address.