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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>
This commit is contained in:
Nick Ewalt 2018-09-17 05:38:59 -07:00 committed by Greg Kroah-Hartman
parent 45dd9954d9
commit 912b8a811c
1 changed files with 2 additions and 2 deletions
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4
drivers/staging/gasket/gasket_page_table.c
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@ -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;