dma-mapping: fix the kerneldoc for dma_map_sg_attrs

Add the missing description for the nents parameter, and fix a trivial
misalignment.

Fixes: fffe3cc8c219 ("dma-mapping: allow map_sg() ops to return negative error codes")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Christoph Hellwig <hch@lst.de>

diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 7ee5284..06fec55 100644 (file)
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -206,7 +206,8 @@ static int __dma_map_sg_attrs(struct device *dev, struct scatterlist *sg,
 /**
  * dma_map_sg_attrs - Map the given buffer for DMA
  * @dev:       The device for which to perform the DMA operation
- * @sg:        The sg_table object describing the buffer
+ * @sg:                The sg_table object describing the buffer
+ * @nents:     Number of entries to map
  * @dir:       DMA direction
  * @attrs:     Optional DMA attributes for the map operation
  *