Messages in this thread Patch in this message | | | From | Joerg Roedel <> | Subject | [PATCH 1/2] iommu/amd: Check for the right TLP prefix bit | Date | Thu, 19 Apr 2012 15:39:36 +0200 |
| |
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> --- drivers/iommu/amd_iommu.c | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index a5bee8e..08f3eec 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -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; } /* -- 1.7.5.4
| |