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[intel] Quirk away MSI support on 945G/GM.

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The PCI caps register reports MSI support even though it isn't really there.
This commit is contained in:
Eric Anholt 2008-06-16 15:15:02 -07:00
parent c847271179
commit e7424e4580
1 changed files with 10 additions and 1 deletions
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11
linux-core/i915_drv.c
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@ -628,7 +628,16 @@ static int probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
int ret;
(void) pci_enable_msi(pdev);
/* On the 945G/GM, the chipset reports the MSI capability on the
* integrated graphics even though the support isn't actually there
* according to the published specs. It doesn't appear to function
* correctly in testing on 945G.
* This may be a side effect of MSI having been made available for PEG
* and the registers being closely associated.
*/
if (pdev->device != 0x2772 && pdev->device != 0x27A2)
(void )pci_enable_msi(pdev);
ret = drm_get_dev(pdev, ent, &driver);
if (ret && pdev->msi_enabled)
pci_disable_msi(pdev);