[patch 4/4] tip, dmar: remove the quirk which disables dma-remapping when intr-remapping enabled

[Suresh Siddha]

From: Youquan Song <youquan.song@xxxxxxxxx>
Subject: remove the quirk which disables dma-remapping when intr-remapping enabled

Now that we have DMA-remapping support for queued invalidation, we
can enable both DMA-remapping and interrupt-remapping at the same time.

Signed-off-by: Youquan Song <youquan.song@xxxxxxxxx>
Signed-off-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
---

Index: tip/drivers/pci/dmar.c
===================================================================
--- tip.orig/drivers/pci/dmar.c	2008-10-08 09:49:30.000000000 -0700
+++ tip/drivers/pci/dmar.c	2008-10-08 10:13:36.000000000 -0700
@@ -462,39 +462,22 @@
 
 	ret = dmar_table_detect();
 
-#ifdef CONFIG_DMAR
 	{
+#ifdef CONFIG_INTR_REMAP
 		struct acpi_table_dmar *dmar;
-		/*
-		 * for now we will disable dma-remapping when interrupt
-		 * remapping is enabled.
-		 * When support for queued invalidation for IOTLB invalidation
-		 * is added, we will not need this any more.
-		 */
 		dmar = (struct acpi_table_dmar *) dmar_tbl;
-		if (ret && cpu_has_x2apic && dmar->flags & 0x1) {
+		if (ret && cpu_has_x2apic && dmar->flags & 0x1)
 			printk(KERN_INFO
 			       "Queued invalidation will be enabled to support "
 			       "x2apic and Intr-remapping.\n");
-			printk(KERN_INFO
-			       "Disabling IOMMU detection, because of missing "
-			       "queued invalidation support for IOTLB "
-			       "invalidation\n");
-			printk(KERN_INFO
-			       "Use \"nox2apic\", if you want to use Intel "
-			       " IOMMU for DMA-remapping and don't care about "
-			       " x2apic support\n");
-
-			dmar_disabled = 1;
-			goto end;
-		}
+#endif
 
+#ifdef CONFIG_DMAR
 		if (ret && !no_iommu && !iommu_detected && !swiotlb &&
 		    !dmar_disabled)
 			iommu_detected = 1;
-	}
-end:
 #endif
+	}
 	if (dmar_tbl)
 		early_acpi_os_unmap_memory(dmar_tbl, dmar_tbl_size);
 

-- 

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