[patch 4/4] 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: linux-2.6.git/drivers/pci/dmar.c
===================================================================
--- linux-2.6.git.orig/drivers/pci/dmar.c	2008-10-16 15:53:31.000000000 -0700
+++ linux-2.6.git/drivers/pci/dmar.c	2008-10-16 15:55:44.000000000 -0700
@@ -455,8 +455,8 @@
 
 	ret = early_dmar_detect();
 
-#ifdef CONFIG_DMAR
 	{
+#ifdef CONFIG_INTR_REMAP
 		struct acpi_table_dmar *dmar;
 		/*
 		 * for now we will disable dma-remapping when interrupt
@@ -465,28 +465,18 @@
 		 * 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;
-			return;
-		}
+#endif
 
+#ifdef CONFIG_DMAR
 		if (ret && !no_iommu && !iommu_detected && !swiotlb &&
 		    !dmar_disabled)
 			iommu_detected = 1;
-	}
 #endif
+	}
 }
 
 

-- 

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