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Subject[30/80] agp/intel: fix dma mask bits on sandybridge
2.6.35-stable review patch.  If anyone has any objections, please let us know.

------------------

From: Zhenyu Wang <zhenyuw@linux.intel.com>

[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>

---
drivers/char/agp/intel-agp.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)

--- a/drivers/char/agp/intel-agp.c
+++ b/drivers/char/agp/intel-agp.c
@@ -835,7 +835,7 @@ static const struct intel_driver_descrip
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(st

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;
}



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