diff options
| author | Rajat Jain <rajatja@google.com> | 2020-07-07 15:46:02 -0700 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2020-07-10 13:49:35 -0500 |
| commit | 52fbf5bdeeef415b28b8e6cdade1e48927927f60 (patch) | |
| tree | 006acc3c262d5b64c7bffbb790ed40805e6bc1f4 /drivers/pci/quirks.c | |
| parent | cbe420361f92a31694fb3773a6247fda9aba1db3 (diff) | |
| download | lwn-52fbf5bdeeef415b28b8e6cdade1e48927927f60.tar.gz lwn-52fbf5bdeeef415b28b8e6cdade1e48927927f60.zip | |
PCI: Cache ACS capability offset in device
Currently the ACS capability is being looked up at a number of places. Read
and store it once at enumeration so that it can be used by all later. No
functional change intended.
Link: https://lore.kernel.org/r/20200707224604.3737893-2-rajatja@google.com
Signed-off-by: Rajat Jain <rajatja@google.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/quirks.c')
| -rw-r--r-- | drivers/pci/quirks.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 812bfc32ecb8..b341628e4752 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -4653,7 +4653,7 @@ static int pci_quirk_intel_spt_pch_acs(struct pci_dev *dev, u16 acs_flags) if (!pci_quirk_intel_spt_pch_acs_match(dev)) return -ENOTTY; - pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS); + pos = dev->acs_cap; if (!pos) return -ENOTTY; @@ -4961,7 +4961,7 @@ static int pci_quirk_enable_intel_spt_pch_acs(struct pci_dev *dev) if (!pci_quirk_intel_spt_pch_acs_match(dev)) return -ENOTTY; - pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS); + pos = dev->acs_cap; if (!pos) return -ENOTTY; @@ -4988,7 +4988,7 @@ static int pci_quirk_disable_intel_spt_pch_acs_redir(struct pci_dev *dev) if (!pci_quirk_intel_spt_pch_acs_match(dev)) return -ENOTTY; - pos = pci_find_ext_capability(dev, PCI_EXT_CAP_ID_ACS); + pos = dev->acs_cap; if (!pos) return -ENOTTY; @@ -5355,7 +5355,7 @@ int pci_idt_bus_quirk(struct pci_bus *bus, int devfn, u32 *l, int timeout) bool found; struct pci_dev *bridge = bus->self; - pos = pci_find_ext_capability(bridge, PCI_EXT_CAP_ID_ACS); + pos = bridge->acs_cap; /* Disable ACS SV before initial config reads */ if (pos) { |