From: Yong Wu Date: Mon, 4 Nov 2019 07:01:08 +0000 (+0800) Subject: iommu/mediatek: Reduce the tlb flush timeout value X-Git-Tag: v5.5-rc1~77^2^5 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=c90ae4a63541e05f77815762ddb0f7aee917b083;p=thirdparty%2Fkernel%2Flinux.git iommu/mediatek: Reduce the tlb flush timeout value Reduce the tlb timeout value from 100000us to 1000us. The original value would make the kernel stuck for 100 ms with interrupts disabled, which could have other side effects. The flush is expected to always take much less than 1 ms, so use that instead. Signed-off-by: Yong Wu Signed-off-by: Joerg Roedel --- diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index c2b7ed5d0f7ca..8ca2e99964fe7 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");