diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/dmar.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index e5cdaf87822c..9f8aa07360ba 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -1204,7 +1204,7 @@ irqreturn_t dmar_fault(int irq, void *dev_id) /* TBD: ignore advanced fault log currently */ if (!(fault_status & DMA_FSTS_PPF)) - goto clear_rest; + goto unlock_exit; fault_index = dma_fsts_fault_record_index(fault_status); reg = cap_fault_reg_offset(iommu->cap); @@ -1245,11 +1245,10 @@ irqreturn_t dmar_fault(int irq, void *dev_id) fault_index = 0; raw_spin_lock_irqsave(&iommu->register_lock, flag); } -clear_rest: - /* clear all the other faults */ - fault_status = readl(iommu->reg + DMAR_FSTS_REG); - writel(fault_status, iommu->reg + DMAR_FSTS_REG); + writel(DMA_FSTS_PFO | DMA_FSTS_PPF, iommu->reg + DMAR_FSTS_REG); + +unlock_exit: raw_spin_unlock_irqrestore(&iommu->register_lock, flag); return IRQ_HANDLED; } @@ -1297,6 +1296,7 @@ int __init enable_drhd_fault_handling(void) for_each_drhd_unit(drhd) { int ret; struct intel_iommu *iommu = drhd->iommu; + u32 fault_status; ret = dmar_set_interrupt(iommu); if (ret) { @@ -1309,6 +1309,8 @@ int __init enable_drhd_fault_handling(void) * Clear any previous faults. */ dmar_fault(iommu->irq, iommu); + fault_status = readl(iommu->reg + DMAR_FSTS_REG); + writel(fault_status, iommu->reg + DMAR_FSTS_REG); } return 0; |