blackfin: Fix tty compile error in PIO mode

[safe/jmp/linux-2.6] / drivers / pci / intr_remapping.c

diff --git a/drivers/pci/intr_remapping.c b/drivers/pci/intr_remapping.c
index c26633d..f5e0ea7 100644 (file)
--- a/drivers/pci/intr_remapping.c
+++ b/drivers/pci/intr_remapping.c
@@ -9,6 +9,7 @@
 #include <asm/cpu.h>
 #include <linux/intel-iommu.h>
 #include "intr_remapping.h"
+#include <acpi/acpi.h>
 
 static struct ioapic_scope ir_ioapic[MAX_IO_APICS];
 static int ir_ioapic_num;
@@ -415,12 +416,27 @@ static void iommu_set_intr_remapping(struct intel_iommu *iommu, int mode)
 
        /* Set interrupt-remapping table pointer */
        cmd = iommu->gcmd | DMA_GCMD_SIRTP;
+       iommu->gcmd |= DMA_GCMD_SIRTP;
        writel(cmd, iommu->reg + DMAR_GCMD_REG);
 
        IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG,
                      readl, (sts & DMA_GSTS_IRTPS), sts);
        spin_unlock_irqrestore(&iommu->register_lock, flags);
 
+       if (mode == 0) {
+               spin_lock_irqsave(&iommu->register_lock, flags);
+
+               /* enable comaptiblity format interrupt pass through */
+               cmd = iommu->gcmd | DMA_GCMD_CFI;
+               iommu->gcmd |= DMA_GCMD_CFI;
+               writel(cmd, iommu->reg + DMAR_GCMD_REG);
+
+               IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG,
+                             readl, (sts & DMA_GSTS_CFIS), sts);
+
+               spin_unlock_irqrestore(&iommu->register_lock, flags);
+       }
+
        /*
         * global invalidation of interrupt entry cache before enabling
         * interrupt-remapping.
@@ -509,6 +525,13 @@ int __init enable_intr_remapping(int eim)
                struct intel_iommu *iommu = drhd->iommu;
 
                /*
+                * If the queued invalidation is already initialized,
+                * shouldn't disable it.
+                */
+               if (iommu->qi)
+                       continue;
+
+               /*
                 * Clear previous faults.
                 */
                dmar_fault(-1, iommu);