From: Zhenyu Wang <zhenyuw@linux.intel.com>
Date: Sun, 19 Sep 2010 02:28:54 +0000 (+0800)
Subject: agp/intel: fix dma mask bits on sandybridge
X-Git-Tag: v2.6.35.6~50
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=96b6a8c56dbee75f61271f6484f56730beb17a20;p=thirdparty%2Fkernel%2Fstable.git

agp/intel: fix dma mask bits on sandybridge

[This is backport patch from upstream 877fdacf.]

Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/drivers/char/agp/intel-agp.c b/drivers/char/agp/intel-agp.c
index 4874b5b422240..fe9c6e0b61797 100644
--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -835,7 +835,7 @@ static const struct intel_driver_description {
 static int __devinit intel_gmch_probe(struct pci_dev *pdev,
 				      struct agp_bridge_data *bridge)
 {
-	int i;
+	int i, mask;
 	bridge->driver = NULL;
 
 	for (i = 0; intel_agp_chipsets[i].name != NULL; i++) {
@@ -855,14 +855,19 @@ static int __devinit intel_gmch_probe(struct pci_dev *pdev,
 
 	dev_info(&pdev->dev, "Intel %s Chipset\n", intel_agp_chipsets[i].name);
 
-	if (bridge->driver->mask_memory == intel_i965_mask_memory) {
-		if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(36)))
-			dev_err(&intel_private.pcidev->dev,
-				"set gfx device dma mask 36bit failed!\n");
-		else
-			pci_set_consistent_dma_mask(intel_private.pcidev,
-						    DMA_BIT_MASK(36));
-	}
+	if (bridge->driver->mask_memory == intel_gen6_mask_memory)
+		mask = 40;
+	else if (bridge->driver->mask_memory == intel_i965_mask_memory)
+		mask = 36;
+	else
+		mask = 32;
+
+	if (pci_set_dma_mask(intel_private.pcidev, DMA_BIT_MASK(mask)))
+		dev_err(&intel_private.pcidev->dev,
+			"set gfx device dma mask %d-bit failed!\n", mask);
+	else
+		pci_set_consistent_dma_mask(intel_private.pcidev,
+					    DMA_BIT_MASK(mask));
 
 	return 1;
 }