staging: gasket: fix DMA direction for extended page tables

Extended page tables should be mapped as DMA_TO_DEVICE, not
bi-directional.

Signed-off-by: Nick Ewalt <nicholasewalt@google.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c
index 71b77da..e86bdc5 100644 (file)
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -320,7 +320,7 @@ static void gasket_free_extended_subtable(struct gasket_page_table *pg_tbl,
 
        if (pte->dma_addr)
                dma_unmap_page(pg_tbl->device, pte->dma_addr, PAGE_SIZE,
-                              DMA_BIDIRECTIONAL);
+                              DMA_TO_DEVICE);
 
        vfree(pte->sublevel);
 
@@ -894,7 +894,7 @@ static int gasket_alloc_extended_subtable(struct gasket_page_table *pg_tbl,
 
        /* Map the page into DMA space. */
        pte->dma_addr = dma_map_page(pg_tbl->device, pte->page, 0, PAGE_SIZE,
-                                    DMA_BIDIRECTIONAL);
+                                    DMA_TO_DEVICE);
 
        /* make the addresses available to the device */
        dma_addr = (pte->dma_addr + pte->offset) | GASKET_VALID_SLOT_FLAG;