net: davinci_emac:Fix translation logic for buffer descriptor

With recent changes to the driver(switch to new cpdma layer),
the support for buffer descriptor address translation logic
is broken. This affects platforms where the physical address of
the descriptors as seen by the DMA engine is different from the
physical address.

Original Patch adding translation logic support:
Commit: ad021ae8862209864dc8ebd3b7d3a55ce84b9ea2

Signed-off-by: Sriramakrishnan A G <srk@ti.com>
Tested-By: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 4 insertions, 1 deletions

diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c
index 082d6ea69920..baca6bfcb089 100644
--- a/drivers/net/davinci_emac.c
+++ b/drivers/net/davinci_emac.c
@@ -1854,10 +1854,13 @@ static int __devinit davinci_emac_probe(struct platform_device *pdev)
         dma_params.rxcp                 = priv->emac_base + 0x660;
         dma_params.num_chan             = EMAC_MAX_TXRX_CHANNELS;
         dma_params.min_packet_size      = EMAC_DEF_MIN_ETHPKTSIZE;
-        dma_params.desc_mem_phys        = hw_ram_addr;
+        dma_params.desc_hw_addr         = hw_ram_addr;
         dma_params.desc_mem_size        = pdata->ctrl_ram_size;
         dma_params.desc_align           = 16;
 
+        dma_params.desc_mem_phys = pdata->no_bd_ram ? 0 :
+                        (u32 __force)res->start + pdata->ctrl_ram_offset;
+
         priv->dma = cpdma_ctlr_create(&dma_params);
         if (!priv->dma) {
                 dev_err(emac_dev, "DaVinci EMAC: Error initializing DMA\n");