From b6d3fe22042b31a35d6830eeebaf5ca9ff4a1da6 Mon Sep 17 00:00:00 2001 From: Mitchel Humpherys Date: Wed, 30 Sep 2015 14:22:39 -0700 Subject: [PATCH] iommu/io-pgtable: Improve documentation of .map_sg callback The return value of the .map_sg callback is currently undocumented. Document it. Change-Id: I195cbfb78eaf173d916dd03190f89b2fe04e144e Signed-off-by: Mitchel Humpherys --- drivers/iommu/io-pgtable.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/io-pgtable.h b/drivers/iommu/io-pgtable.h index f74f148ea76f..5d3848aeba07 100644 --- a/drivers/iommu/io-pgtable.h +++ b/drivers/iommu/io-pgtable.h @@ -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. -- 2.11.0