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| author | Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> | 2009-11-05 12:05:11 +0900 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-11-06 13:59:02 -0800 |
| commit | 0efea0006335a2425b1a12a2ad35efad626fe353 (patch) | |
| tree | d139b06a32665ec1227c06f1c0a14b21e3c0d654 /drivers/pci/probe.c | |
| parent | 1e5ad9679016275d422e36b12a98b0927d76f556 (diff) | |
| download | lwn-0efea0006335a2425b1a12a2ad35efad626fe353.tar.gz lwn-0efea0006335a2425b1a12a2ad35efad626fe353.zip | |
PCI: cache PCIe capability offset
There are a lot of codes that searches PCI express capability offset
in the PCI configuration space using pci_find_capability(). Caching it
in the struct pci_dev will reduce unncecessary search. This patch adds
an additional 'pcie_cap' fields into struct pci_dev, which is
initialized at pci device scan time (in set_pcie_port_type()).
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci/probe.c')
| -rw-r--r-- | drivers/pci/probe.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index 623086f9ba84..54b9f1501487 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -692,6 +692,7 @@ static void set_pcie_port_type(struct pci_dev *pdev) if (!pos) return; 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; } |