On Thursday 08 of August 2013 18:37:34 Cho KyongHo wrote: > 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. > > Tested-by: Grant Grundler <grundler@xxxxxxxxxxxx> > Signed-off-by: Cho KyongHo <pullip.cho@xxxxxxxxxxx> > --- > drivers/iommu/exynos-iommu.c | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c > index 233f382..d545a25 100644 > --- a/drivers/iommu/exynos-iommu.c > +++ b/drivers/iommu/exynos-iommu.c > @@ -1002,6 +1002,7 @@ 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; > } > @@ -1010,6 +1011,7 @@ static size_t exynos_iommu_unmap(struct > iommu_domain *domain, BUG_ON(size < LPAGE_SIZE); > > 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; Looks reasonable. Reviewed-by: Tomasz Figa <t.figa@xxxxxxxxxxx> Best regards, Tomasz -- 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