diff mbox

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

Message ID 1439363150-8661-27-git-send-email-hch@lst.de (mailing list archive)
State Not Applicable
Headers show

Commit Message

Christoph Hellwig Aug. 12, 2015, 7:05 a.m. UTC 
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 mbox

Patch

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;