[PATCH 20/31] avr32: handle page-less SG entries

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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

Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
 arch/avr32/include/asm/dma-mapping.h | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/avr32/include/asm/dma-mapping.h b/arch/avr32/include/asm/dma-mapping.h
index ae7ac92..a662ce2 100644
--- a/arch/avr32/include/asm/dma-mapping.h
+++ b/arch/avr32/include/asm/dma-mapping.h
@@ -216,11 +216,9 @@ dma_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
 	struct scatterlist *sg;
 
 	for_each_sg(sglist, sg, nents, i) {
-		char *virt;
-
-		sg->dma_address = page_to_bus(sg_page(sg)) + sg->offset;
-		virt = sg_virt(sg);
-		dma_cache_sync(dev, virt, sg->length, direction);
+		sg->dma_address = sg_phys(sg);
+		if (sg_has_page(sg))
+			dma_cache_sync(dev, sg_virt(sg), sg->length, direction);
 	}
 
 	return nents;
@@ -328,8 +326,10 @@ dma_sync_sg_for_device(struct device *dev, struct scatterlist *sglist,
 	int i;
 	struct scatterlist *sg;
 
-	for_each_sg(sglist, sg, nents, i)
-		dma_cache_sync(dev, sg_virt(sg), sg->length, direction);
+	for_each_sg(sglist, sg, nents, i) {
+		if (sg_has_page(sg))
+			dma_cache_sync(dev, sg_virt(sg), sg->length, direction);
+	}
 }
 
 /* Now for the API extensions over the pci_ one */
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Linux Input]     [Video for Linux]     [Gstreamer Embedded]     [Mplayer Users]     [Linux USB Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [Yosemite Backpacking]
  Powered by Linux