Currently, we use pcie_flags_reg to cache PCI-E Capabilities Register,
because PCI-E Capabilities Register bits are almost read-only. This patch
use pcie_flags_reg instead of another access PCI-E Capabilities Register.
Signed-off-by: Yijing Wang <wangyij...@huawei.com>
---
drivers/vfio/pci/vfio_pci_config.c | 6 +-----
1 files changed, 1 insertions(+), 5 deletions(-)
diff --git a/drivers/vfio/pci/vfio_pci_config.c
b/drivers/vfio/pci/vfio_pci_config.c
index aeb00fc..afc6ca4 100644
--- a/drivers/vfio/pci/vfio_pci_config.c
+++ b/drivers/vfio/pci/vfio_pci_config.c
@@ -1017,13 +1017,9 @@ static int vfio_cap_len(struct vfio_pci_device *vdev, u8
cap, u8 pos)
return byte;
case PCI_CAP_ID_EXP:
/* length based on version */
- ret = pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, &word);
- if (ret)
- return pcibios_err_to_errno(ret);
-
vdev->extended_caps = true;
- if ((word & PCI_EXP_FLAGS_VERS) == 1)
+ if ((pdev->pcie_flags_reg & PCI_EXP_FLAGS_VERS) == 1)
return PCI_CAP_EXP_ENDPOINT_SIZEOF_V1;
else
return PCI_CAP_EXP_ENDPOINT_SIZEOF_V2;
--
1.7.1
--
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