dw_dmac: Adding support for 64 bit access width for memcpy xfers

[platform/kernel/linux-rpi.git] / drivers / dma / dw_dmac.c

diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
index 2b0d5e9..e5d97bf 100644 (file)
--- a/drivers/dma/dw_dmac.c
+++ b/drivers/dma/dw_dmac.c
@@ -583,7 +583,9 @@ dwc_prep_dma_memcpy(struct dma_chan *chan, dma_addr_t dest, dma_addr_t src,
         * We can be a lot more clever here, but this should take care
         * of the most common optimization.
         */
-       if (!((src | dest  | len) & 3))
+       if (!((src | dest  | len) & 7))
+               src_width = dst_width = 3;
+       else if (!((src | dest  | len) & 3))
                src_width = dst_width = 2;
        else if (!((src | dest | len) & 1))
                src_width = dst_width = 1;