[PATCH 26/31] openrisc: handle page-less SG entries

Christoph Hellwig
2015-08-12T07:05:45Z

Make all cache invalidation conditional on sg_has_page() and use
sg_phys to get the physical address directly.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
arch/openrisc/kernel/dma.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/arch/openrisc/kernel/dma.c b/arch/openrisc/kernel/dma.c
index 0b77ddb..94ed052 100644
--- a/arch/openrisc/kernel/dma.c
+++ b/arch/openrisc/kernel/dma.c
@@ -184,8 +184,13 @@ or1k_map_sg(struct device *dev, struct scatterlist *sg,
int i;

for_each_sg(sg, s, nents, i) {
- s->dma_address = or1k_map_page(dev, sg_page(s), s->offset,
- s->length, dir, NULL);
+ if (sg_has_page(s)) {
+ s->dma_address = or1k_map_page(dev, sg_page(s),
+ s->offset, s->length, dir,
+ NULL);
+ } else {
+ s->dma_address = sg_phys(s);
+ }
}

return nents;
--
1.9.1