From: Yong Wu <yong.wu@xxxxxxxxxxxx>
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 <yong.wu@xxxxxxxxxxxx>
Reviewed-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
---
drivers/iommu/mtk_iommu.c | 16 +++++++---------
1 file changed, 7 insertions(+), 9 deletions(-)
diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 507123ae7485..342aa562ab6a 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -210,17 +210,15 @@ static struct mtk_iommu_domain *to_mtk_domain(struct iommu_domain *dom)
static void mtk_iommu_tlb_flush_all(struct mtk_iommu_data *data)
{
- for_each_m4u(data) {
- 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,
--
2.17.1
