From: Cho KyongHo <pullip.cho@xxxxxxxxxxx> This commit adds cache flush for removed small and large page entries in exynos_iommu_unmap(). Missing cache flush of removed page table entries can cause missing page fault interrupt when a master IP accesses an unmapped area. Reviewed-by: Tomasz Figa <t.figa@xxxxxxxxxxx> Tested-by: Grant Grundler <grundler@xxxxxxxxxxxx> Signed-off-by: Cho KyongHo <pullip.cho@xxxxxxxxxxx> Signed-off-by: Shaik Ameer Basha <shaik.ameer@xxxxxxxxxxx> --- drivers/iommu/exynos-iommu.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c index 4fc31fc..6915235 100644 --- a/drivers/iommu/exynos-iommu.c +++ b/drivers/iommu/exynos-iommu.c @@ -904,6 +904,7 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain, if (lv2ent_small(ent)) { *ent = 0; size = SPAGE_SIZE; + pgtable_flush(ent, ent + 1); priv->lv2entcnt[lv1ent_offset(iova)] += 1; goto done; } @@ -915,6 +916,7 @@ static size_t exynos_iommu_unmap(struct iommu_domain *domain, } memset(ent, 0, sizeof(*ent) * SPAGES_PER_LPAGE); + pgtable_flush(ent, ent + SPAGES_PER_LPAGE); size = LPAGE_SIZE; priv->lv2entcnt[lv1ent_offset(iova)] += SPAGES_PER_LPAGE; -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html