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iommu/amd: Check for the right TLP prefix bit

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Unfortunatly the PRI spec changed and moved the
TLP-prefix-required bit to a different location. This patch
makes the necessary change in the AMD IOMMU driver.
Regressions are not expected because all hardware
implementing the PRI capability sets this bit to zero
anyway.

Cc: stable@vger.kernel.org # v3.3
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2012-04-12 12:49:26 +02:00
parent 0034102808
commit a3b9312143
1 changed files with 4 additions and 4 deletions
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8
drivers/iommu/amd_iommu.c
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@ -2035,20 +2035,20 @@ out_err:
}
/* FIXME: Move this to PCI code */
#define PCI_PRI_TLP_OFF (1 << 2)
#define PCI_PRI_TLP_OFF (1 << 15)
bool pci_pri_tlp_required(struct pci_dev *pdev)
{
u16 control;
u16 status;
int pos;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_PRI);
if (!pos)
return false;
pci_read_config_word(pdev, pos + PCI_PRI_CTRL, &control);
pci_read_config_word(pdev, pos + PCI_PRI_STATUS, &status);
return (control & PCI_PRI_TLP_OFF) ? true : false;
return (status & PCI_PRI_TLP_OFF) ? true : false;
}
/*