From: Nick Ewalt <nicholasewalt@google.com>
Date: Mon, 17 Sep 2018 12:39:00 +0000 (-0700)
Subject: staging: gasket: fix data page unmap DMA direction
X-Git-Tag: v4.20-rc1~72^2~369
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=d2118f8e93dfc41ab660fb97593dbd6ebdd11f7e;p=thirdparty%2Fkernel%2Flinux.git

staging: gasket: fix data page unmap DMA direction

The DMA direction supplied to dma_unmap_page should match the
corresponding dma_map_page call, which is mapped 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 e86bdc5fc79d2..8fe27e7d1b53c 100644
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -612,7 +612,7 @@ static void gasket_perform_unmapping(struct gasket_page_table *pg_tbl,
 		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;