Commit f8b6a076 authored Sep 17, 2018 by Nick Ewalt Committed by Greg Kroah-Hartman Sep 18, 2018

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>

parent d2118f8e

drivers/staging/gasket/gasket_page_table.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);
		}

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