dmaengine: remove DMA unmap from drivers
Remove support for DMA unmapping from drivers as it is no longer
needed (DMA core code is now handling it).
Cc: Vinod Koul <vinod.koul@intel.com>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: Dave Jiang <dave.jiang@intel.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
[djbw: fix up chan2parent() unused warning in drivers/dma/dw/core.c]
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/dma/mv_xor.c b/drivers/dma/mv_xor.c
index ed1ab1d..17326e7 100644
--- a/drivers/dma/mv_xor.c
+++ b/drivers/dma/mv_xor.c
@@ -60,14 +60,6 @@
return hw_desc->phy_dest_addr;
}
-static u32 mv_desc_get_src_addr(struct mv_xor_desc_slot *desc,
- int src_idx)
-{
- struct mv_xor_desc *hw_desc = desc->hw_desc;
- return hw_desc->phy_src_addr[mv_phy_src_idx(src_idx)];
-}
-
-
static void mv_desc_set_byte_count(struct mv_xor_desc_slot *desc,
u32 byte_count)
{
@@ -279,42 +271,8 @@
desc->async_tx.callback_param);
dma_descriptor_unmap(&desc->async_tx);
- /* unmap dma addresses
- * (unmap_single vs unmap_page?)
- */
- if (desc->group_head && desc->unmap_len) {
- struct mv_xor_desc_slot *unmap = desc->group_head;
- struct device *dev = mv_chan_to_devp(mv_chan);
- u32 len = unmap->unmap_len;
- 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)) {
- 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)) {
- 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);
- }
- }
+ if (desc->group_head)
desc->group_head = NULL;
- }
}
/* run dependent operations */