commit 3ff0b4d79009ca3b679e91e51f079e700e29d3c0
author Leonid Lobachev <leonidl@google.com> Mon Sep 23 11:53:12 2019 -0700
committer Jonas Larsson <ljonas@google.com> Thu Oct 31 16:13:49 2019 -0700
tree 1b173c426ff2cda85b3b4a4646359fb860b3b062
parent 8d48b6be65262d398558b97eb96590156b4a74f2

staging: gasket: page_table: fix dma_data_direction

Extended page tables can be mapped as DMA_TO_DEVICE.
Calls to dma_unmap_page should match corresponding dma_map_page.

Change-Id: I2d09fd5d66c364e190b073fabe089ce5eaf426f6
Signed-off-by: Nick Ewalt <nicholasewalt@google.com>
Signed-off-by: Todd Poynor <toddpoynor@google.com>

drivers/staging/gasket/gasket_page_table.c

diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c
index bc17f78..81b6b47 100644
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -320,7 +320,7 @@
 
 	if (pte->dma_addr)
 		dma_unmap_page(pg_tbl->device, pte->dma_addr, PAGE_SIZE,
-			       DMA_BIDIRECTIONAL);
+			       DMA_TO_DEVICE);
 
 	vfree(pte->sublevel);
 
@@ -612,7 +612,7 @@
 		if (ptes[i].status == PTE_INUSE) {
 			if (ptes[i].dma_addr) {
 				dma_unmap_page(pg_tbl->device, ptes[i].dma_addr,
-					       PAGE_SIZE, DMA_FROM_DEVICE);
+					       PAGE_SIZE, DMA_BIDIRECTIONAL);
 			}
 			if (gasket_release_page(ptes[i].page))
 				--pg_tbl->num_active_pages;
@@ -894,7 +894,7 @@
 
 	/* 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;