The tlb_sync_all is called from these three functions: a) flush_iotlb_all: it will be called for each a iommu HW. b) tlb_flush_range_sync: it already has for_each_m4u. c) in irq: When IOMMU HW translation fault, Only need flush itself.
Thus, No need for_each_m4u in this tlb_sync_all. Remove it. Signed-off-by: Yong Wu <[email protected]> --- drivers/iommu/mtk_iommu.c | 18 +++++++----------- 1 file changed, 7 insertions(+), 11 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 6f4f6624e3ac..0b4c30baa864 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -206,19 +206,15 @@ static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom) static void mtk_iommu_tlb_flush_all(struct mtk_iommu_data *data) { - struct list_head *head = data->hw_list; - - for_each_m4u(data, head) { - if (pm_runtime_get_if_in_use(data->dev) <= 0) - continue; + if (pm_runtime_get_if_in_use(data->dev) <= 0) + return; - writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, - data->base + data->plat_data->inv_sel_reg); - writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE); - wmb(); /* Make sure the tlb flush all done */ + writel_relaxed(F_INVLD_EN1 | F_INVLD_EN0, + data->base + data->plat_data->inv_sel_reg); + writel_relaxed(F_ALL_INVLD, data->base + REG_MMU_INVALIDATE); + wmb(); /* Make sure the tlb flush all done */ - pm_runtime_put(data->dev); - } + pm_runtime_put(data->dev); } static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size, -- 2.18.0 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
