From 973b546451fdf11e518cc96d1b137af893a38db5 Mon Sep 17 00:00:00 2001 From: Lu Baolu Date: Fri, 3 Nov 2017 10:51:33 -0600 Subject: iommu/vt-d: Clear Page Request Overflow fault bit Currently Page Request Overflow bit in IOMMU Fault Status register is not cleared. Not clearing this bit would mean that any future page-request is going to be automatically dropped by IOMMU. Suggested-by: Ashok Raj Signed-off-by: Lu Baolu Signed-off-by: Alex Williamson --- drivers/iommu/dmar.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/iommu') diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index 1ea7cd537873..9a7ffd13c7f0 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1679,7 +1679,8 @@ irqreturn_t dmar_fault(int irq, void *dev_id) raw_spin_lock_irqsave(&iommu->register_lock, flag); } - writel(DMA_FSTS_PFO | DMA_FSTS_PPF, iommu->reg + DMAR_FSTS_REG); + writel(DMA_FSTS_PFO | DMA_FSTS_PPF | DMA_FSTS_PRO, + iommu->reg + DMAR_FSTS_REG); unlock_exit: raw_spin_unlock_irqrestore(&iommu->register_lock, flag); -- cgit v1.2.1