From: Todd Poynor <toddpoy...@google.com>
coherent address mappings aren't backed by a struct page, don't need to
be released, and don't count as an active page in the page table
bookkeeping.
Signed-off-by: Simon Que <s...@chromium.org>
Signed-off-by: Todd Poynor <toddpoy...@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 d7600d8e385f..9a4a81c010f9 100644
--- a/drivers/staging/gasket/gasket_page_table.c
+++ b/drivers/staging/gasket/gasket_page_table.c
@@ -1248,7 +1248,7 @@ static void gasket_perform_unmapping(
dma_unmap_page(pg_tbl->device, ptes[i].dma_addr,
PAGE_SIZE, DMA_FROM_DEVICE);
}
- if (gasket_release_page(ptes[i].page))
+ if (ptes[i].page && gasket_release_page(ptes[i].page))
--pg_tbl->num_active_pages;
}
ptes[i].status = PTE_FREE;
--
2.18.0.203.gfac676dfb9-goog
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