Messages in this thread Patch in this message | | | From | Todd Poynor <> | Subject | [PATCH 06/10] staging: gasket: page_table: don't unmap coherent pages | Date | Mon, 17 Sep 2018 05:39:01 -0700 |
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From: Nick Ewalt <nicholasewalt@google.com>
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> --- drivers/staging/gasket/gasket_page_table.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/staging/gasket/gasket_page_table.c b/drivers/staging/gasket/gasket_page_table.c index 8fe27e7d1b53c..33d98043953a5 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); } -- 2.19.0.397.gdd90340f6a-goog
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