From: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Date: Wed, 17 Jun 2009 20:08:31 +0000 (-0700)
Subject: DMA: txx9dmac: use dma_unmap_single if DMA_COMPL_{SRC,DEST}_UNMAP_SINGLE set
X-Git-Tag: v2.6.31-rc1~7^2~5
X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=4ac4aa5cc3b00cc558575065ae71043e92d1a69a

DMA: txx9dmac: use dma_unmap_single if DMA_COMPL_{SRC,DEST}_UNMAP_SINGLE set

This patch does not change actual behaviour since dma_unmap_page is just
an alias of dma_unmap_single on MIPS.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Acked-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/drivers/dma/txx9dmac.c b/drivers/dma/txx9dmac.c
index 9aa9ea9..88dab52 100644
--- a/drivers/dma/txx9dmac.c
+++ b/drivers/dma/txx9dmac.c
@@ -432,23 +432,27 @@ txx9dmac_descriptor_complete(struct txx9dmac_chan *dc,
 	list_splice_init(&txd->tx_list, &dc->free_list);
 	list_move(&desc->desc_node, &dc->free_list);
 
-	/*
-	 * We use dma_unmap_page() regardless of how the buffers were
-	 * mapped before they were submitted...
-	 */
 	if (!ds) {
 		dma_addr_t dmaaddr;
 		if (!(txd->flags & DMA_COMPL_SKIP_DEST_UNMAP)) {
 			dmaaddr = is_dmac64(dc) ?
 				desc->hwdesc.DAR : desc->hwdesc32.DAR;
-			dma_unmap_page(chan2parent(&dc->chan), dmaaddr,
-				       desc->len, DMA_FROM_DEVICE);
+			if (txd->flags & DMA_COMPL_DEST_UNMAP_SINGLE)
+				dma_unmap_single(chan2parent(&dc->chan),
+					dmaaddr, desc->len, DMA_FROM_DEVICE);
+			else
+				dma_unmap_page(chan2parent(&dc->chan),
+					dmaaddr, desc->len, DMA_FROM_DEVICE);
 		}
 		if (!(txd->flags & DMA_COMPL_SKIP_SRC_UNMAP)) {
 			dmaaddr = is_dmac64(dc) ?
 				desc->hwdesc.SAR : desc->hwdesc32.SAR;
-			dma_unmap_page(chan2parent(&dc->chan), dmaaddr,
-				       desc->len, DMA_TO_DEVICE);
+			if (txd->flags & DMA_COMPL_SRC_UNMAP_SINGLE)
+				dma_unmap_single(chan2parent(&dc->chan),
+					dmaaddr, desc->len, DMA_TO_DEVICE);
+			else
+				dma_unmap_page(chan2parent(&dc->chan),
+					dmaaddr, desc->len, DMA_TO_DEVICE);
 		}
 	}