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Commit 380544d0 authored by qctecmdr's avatar qctecmdr Committed by Gerrit - the friendly Code Review server
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Merge "iommu/io-pgtable-arm: sync map update before page table walk"

parents 72c580e8 8e63fdbe

drivers/iommu/io-pgtable-arm.c

+6 −0
Original line number Diff line number Diff line
@@ -694,6 +694,12 @@ static int arm_lpae_map_sg(struct io_pgtable_ops *ops, unsigned long iova, 
			ms.num_pte * sizeof(*ms.pte_start),

			DMA_TO_DEVICE);



	/*

	 * Synchronise all PTE updates for the new mapping before there's

	 * a chance for anything to kick off a table walk for the new iova.

	 */

	wmb();



	return mapped;



out_err: