[PATCH] txx9dmac: use dma_unmap_single if DMA_COMPL_{SRC,DEST}_UNMAP_SINGLE was set

From: Atsushi Nemoto
Date: Fri May 15 2009 - 11:23:43 EST


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@xxxxxxxxxxxxx>
---
This patch is against linux-mips.org linux-queue tree.
Please queue this or fold into "DMA: TXx9 Soc DMA Controller driver" patch.

drivers/dma/txx9dmac.c | 20 ++++++++++++--------
1 files changed, 12 insertions(+), 8 deletions(-)

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);
}
}

--
1.5.6.5

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