microblaze: Do not setup empty unmap_sg function

No reason to setup empty function. Core is checking
if this function should be called or not.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>

diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c
index 8f9b99508e797055f25edf180942dd6f55f455ea..4633c36c1b32fd09134131fabb184c0b2533aaa6 100644 (file)
--- a/arch/microblaze/kernel/dma.c
+++ b/arch/microblaze/kernel/dma.c
@@ -68,12 +68,6 @@ static int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl,
        return nents;
 }
 
-static void dma_direct_unmap_sg(struct device *dev, struct scatterlist *sg,
-                               int nents, enum dma_data_direction direction,
-                               struct dma_attrs *attrs)
-{
-}
-
 static int dma_direct_dma_supported(struct device *dev, u64 mask)
 {
        return 1;
@@ -164,7 +158,6 @@ struct dma_map_ops dma_direct_ops = {
        .alloc          = dma_direct_alloc_coherent,
        .free           = dma_direct_free_coherent,
        .map_sg         = dma_direct_map_sg,
-       .unmap_sg       = dma_direct_unmap_sg,
        .dma_supported  = dma_direct_dma_supported,
        .map_page       = dma_direct_map_page,
        .unmap_page     = dma_direct_unmap_page,