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| author | Yijing Wang <wangyijing@huawei.com> | 2012-07-24 17:20:02 +0800 |
|---|---|---|
| committer | Jiang Liu <liuj97@gmail.com> | 2012-08-20 22:32:20 +0800 |
| commit | 786e22885d9959fda0473ace5a61cb11620fba9b (patch) | |
| tree | bfd70885b7d52deaef338ee212bf66ac682f8e42 /drivers/pci/probe.c | |
| parent | 0d7614f09c1ebdbaa1599a5aba7593f147bf96ee (diff) | |
| download | lwn-786e22885d9959fda0473ace5a61cb11620fba9b.tar.gz lwn-786e22885d9959fda0473ace5a61cb11620fba9b.zip | |
PCI: Add pcie_flags_reg to cache PCIe capabilities register
Since PCI Express Capabilities Register is read only, cache its value
into struct pci_dev to avoid repeatedly calling pci_read_config_*().
Signed-off-by: Yijing Wang <wangyijing@huawei.com>
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 6c143b4497ca..ba4d8550503c 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -929,7 +929,8 @@ void set_pcie_port_type(struct pci_dev *pdev) pdev->is_pcie = 1; pdev->pcie_cap = pos; pci_read_config_word(pdev, pos + PCI_EXP_FLAGS, ®16); - pdev->pcie_type = (reg16 & PCI_EXP_FLAGS_TYPE) >> 4; + pdev->pcie_flags_reg = reg16; + pdev->pcie_type = pci_pcie_type(pdev); pci_read_config_word(pdev, pos + PCI_EXP_DEVCAP, ®16); pdev->pcie_mpss = reg16 & PCI_EXP_DEVCAP_PAYLOAD; } |