X-Git-Url: http://pilppa.org/gitweb/gitweb.cgi?a=blobdiff_plain;f=drivers%2Fdma%2Fmv_xor.c;h=bcda17426411ea6f4c311aa5b077a1e91e906b63;hb=eae34c67940f2a71837ed30d571b93572186d46b;hp=0328da020a1084e6c7f0fcfd0e729a00e079702d;hpb=3cf430b0636045dc524759a0852293ba037732a7;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index 0328da020a1..bcda1742641 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -311,17 +311,26 @@ mv_xor_run_tx_complete_actions(struct mv_xor_desc_slot *desc,
 			enum dma_ctrl_flags flags = desc->async_tx.flags;
 			u32 src_cnt;
 			dma_addr_t addr;
+			dma_addr_t dest;
 
+			src_cnt = unmap->unmap_src_cnt;
+			dest = mv_desc_get_dest_addr(unmap);
 			if (!(flags & DMA_COMPL_SKIP_DEST_UNMAP)) {
-				addr = mv_desc_get_dest_addr(unmap);
-				dma_unmap_page(dev, addr, len, DMA_FROM_DEVICE);
+				enum dma_data_direction dir;
+
+				if (src_cnt > 1) /* is xor ? */
+					dir = DMA_BIDIRECTIONAL;
+				else
+					dir = DMA_FROM_DEVICE;
+				dma_unmap_page(dev, dest, len, dir);
 			}
 
 			if (!(flags & DMA_COMPL_SKIP_SRC_UNMAP)) {
-				src_cnt = unmap->unmap_src_cnt;
 				while (src_cnt--) {
 					addr = mv_desc_get_src_addr(unmap,
 								    src_cnt);
+					if (addr == dest)
+						continue;
 					dma_unmap_page(dev, addr, len,
 						       DMA_TO_DEVICE);
 				}