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Commit 53c15a34 authored by Patrick Daly's avatar Patrick Daly Committed by Liam Mark
Browse files

iommu: io-pgtable-arm: Remove duplicate tlb flush 



In a previous patch, iommu_unmap was modified to use the tlbiall
operation, but not all instances of tlbiva were removed.
Remove them now to avoid unnecessary work by the cpu.

Change-Id: Ia5a71dfeb363cdf87354c57ef32f9868c0bafa69
Signed-off-by: default avatarPatrick Daly <pdaly@codeaurora.org>
parent a60934ca

drivers/iommu/io-pgtable-arm.c

+0 −9
Original line number Diff line number Diff line
@@ -873,16 +873,7 @@ static int __arm_lpae_unmap(struct arm_lpae_io_pgtable *data, 
		if (!iopte_tblcnt(*ptep)) {

			/* no valid mappings left under this table. free it. */

			__arm_lpae_set_pte(ptep, 0, &iop->cfg);

			io_pgtable_tlb_add_flush(iop, iova,

						 entries * entry_size,

						 ARM_LPAE_GRANULE(data),

						 false);

			__arm_lpae_free_pgtable(data, lvl + 1, table_base);

		} else {

			io_pgtable_tlb_add_flush(iop, iova,

						 entries * entry_size,

						 ARM_LPAE_GRANULE(data),

						 true);

		}



		return entries * entry_size;