[PATCH v4 7/7] iommu/mediatek: Reduce the tlb flush timeout value

From: Yong Wu
Date: Tue Oct 15 2019 - 23:34:29 EST


Reduce the tlb timeout value from 100000us to 1000us. the original value
is so long that affect the multimedia performance. This is only a minor
improvement rather than fixing a issue.

Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
---
drivers/iommu/mtk_iommu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index c2b7ed5..8ca2e99 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -192,7 +192,7 @@ static void mtk_iommu_tlb_flush_range_sync(unsigned long iova, size_t size,

/* tlb sync */
ret = readl_poll_timeout_atomic(data->base + REG_MMU_CPE_DONE,
- tmp, tmp != 0, 10, 100000);
+ tmp, tmp != 0, 10, 1000);
if (ret) {
dev_warn(data->dev,
"Partial TLB flush timed out, falling back to full flush\n");
--
1.9.1