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PCI: designware: Make config accessor override checking symmetric

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Drivers based on the DesignWare core can override the config read accessors
by supplying rd_own_conf() and rd_other_conf() function pointers.
dw_pcie_rd_conf() calls dw_pcie_rd_own_conf() (for accesses to the root
bus) or dw_pcie_rd_other_conf():

  dw_pcie_rd_conf
    dw_pcie_rd_own_conf                # if on root bus
    dw_pcie_rd_other_conf              # if not on root bus

Previously we checked for rd_other_conf() directly in dw_pcie_rd_conf(),
but we checked for rd_own_conf() in dw_pcie_rd_own_conf().

Check for rd_other_conf() in dw_pcie_rd_other_conf() to make this symmetric
with the rd_own_conf() checking, and similarly for the write path.

No functional change intended.

Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Pratyush Anand <pratyush.anand@gmail.com>
This commit is contained in:
Bjorn Helgaas 2016-01-05 15:56:30 -06:00
parent 116a489d78
commit 67de2dc34c
1 changed files with 6 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
drivers/pci/host/pcie-designware.c
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@ -564,6 +564,9 @@ static int dw_pcie_rd_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u64 cpu_addr;
void __iomem *va_cfg_base;
if (pp->ops->rd_other_conf)
return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
@ -598,6 +601,9 @@ static int dw_pcie_wr_other_conf(struct pcie_port *pp, struct pci_bus *bus,
u64 cpu_addr;
void __iomem *va_cfg_base;
if (pp->ops->wr_other_conf)
return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
busdev = PCIE_ATU_BUS(bus->number) | PCIE_ATU_DEV(PCI_SLOT(devfn)) |
PCIE_ATU_FUNC(PCI_FUNC(devfn));
@ -660,9 +666,6 @@ static int dw_pcie_rd_conf(struct pci_bus *bus, u32 devfn, int where,
if (bus->number == pp->root_bus_nr)
return dw_pcie_rd_own_conf(pp, where, size, val);
if (pp->ops->rd_other_conf)
return pp->ops->rd_other_conf(pp, bus, devfn, where, size, val);
return dw_pcie_rd_other_conf(pp, bus, devfn, where, size, val);
}
@ -677,9 +680,6 @@ static int dw_pcie_wr_conf(struct pci_bus *bus, u32 devfn,
if (bus->number == pp->root_bus_nr)
return dw_pcie_wr_own_conf(pp, where, size, val);
if (pp->ops->wr_other_conf)
return pp->ops->wr_other_conf(pp, bus, devfn, where, size, val);
return dw_pcie_wr_other_conf(pp, bus, devfn, where, size, val);
}