x86, dmar: start with sane state while enabling dma and interrupt-remapping
Impact: cleanup/sanitization
Start from a sane state while enabling dma and interrupt-remapping, by
clearing the previous recorded faults and disabling previously
enabled queued invalidation and interrupt-remapping.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 932e5e3..f180500 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -982,7 +982,7 @@
}
#define PRIMARY_FAULT_REG_LEN (16)
-static irqreturn_t dmar_fault(int irq, void *dev_id)
+irqreturn_t dmar_fault(int irq, void *dev_id)
{
struct intel_iommu *iommu = dev_id;
int reg, fault_index;
@@ -1074,9 +1074,6 @@
return 0;
}
- /* Force fault register is cleared */
- dmar_fault(irq, iommu);
-
ret = request_irq(irq, dmar_fault, 0, iommu->name, iommu);
if (ret)
printk(KERN_ERR "IOMMU: can't request irq\n");