diff options
| author | Nick Ewalt <nicholasewalt@google.com> | 2018-09-17 05:39:01 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-18 13:22:01 +0200 |
| commit | f8b6a076610f4eb44b0b02c110b7e6f981d7cdc2 (patch) | |
| tree | 0607d9cb701e968efe9c50b141414d96ef79796a /drivers/staging/gasket | |
| parent | d2118f8e93dfc41ab660fb97593dbd6ebdd11f7e (diff) | |
staging: gasket: page_table: don't unmap coherent pages
Only call dma_unmap_page if there was an associated dma_map_page call.
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>
Diffstat (limited to 'drivers/staging/gasket')
| -rw-r--r-- | drivers/staging/gasket/gasket_page_table.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c index 8fe27e7d1b53..33d98043953a 100644 --- a/drivers/staging/gasket/gasket_page_table.c +++ b/drivers/staging/gasket/gasket_page_table.c @@ -610,7 +610,7 @@ static void gasket_perform_unmapping(struct gasket_page_table *pg_tbl, /* release the address from the driver, */ if (ptes[i].status == PTE_INUSE) { - if (ptes[i].dma_addr) { + if (ptes[i].page && ptes[i].dma_addr) { dma_unmap_page(pg_tbl->device, ptes[i].dma_addr, PAGE_SIZE, DMA_BIDIRECTIONAL); } |