redonkable/alistair23-linux
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PCIe port bus: use pci_pcie_cap()

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Use pci_pcie_cap() instead of pci_find_capability() to get PCIe capability
offset in PCI Express Port Bus driver. This avoids unnecessary serarch
in PCI configuration space.

Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Kenji Kaneshige 2009-11-11 14:32:42 +09:00 committed by Jesse Barnes
parent 39a53062cb
commit dba90dfe48
1 changed files with 7 additions and 7 deletions
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14
drivers/pci/pcie/portdrv_core.c
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@ -108,7 +108,7 @@ static int pcie_port_enable_msix(struct pci_dev *dev, int *vectors, int mask)
* the value in this field indicates which MSI-X Table entry is
* used to generate the interrupt message."
*/
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
pos = pci_pcie_cap(dev);
pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, &reg16);
entry = (reg16 >> 9) & PCIE_PORT_MSI_VECTOR_MASK;
if (entry >= nr_entries)
@ -226,7 +226,7 @@ static int get_port_device_capability(struct pci_dev *dev)
u16 reg16;
u32 reg32;
pos = pci_find_capability(dev, PCI_CAP_ID_EXP);
pos = pci_pcie_cap(dev);
pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, &reg16);
/* Hot-Plug Capable */
if (reg16 & PORT_TO_SLOT_MASK) {
@ -305,7 +305,8 @@ int pcie_port_device_probe(struct pci_dev *dev)
int pos, type;
u16 reg;
if (!(pos = pci_find_capability(dev, PCI_CAP_ID_EXP)))
pos = pci_pcie_cap(dev);
if (!pos)
return -ENODEV;
pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, &reg);
@ -327,7 +328,7 @@ int pcie_port_device_probe(struct pci_dev *dev)
int pcie_port_device_register(struct pci_dev *dev)
{
struct pcie_port_data *port_data;
int status, capabilities, irq_mode, i, nr_serv;
int status, capabilities, irq_mode, i, nr_serv, pos;
int vectors[PCIE_PORT_DEVICE_MAXSERVICES];
u16 reg16;
@ -337,9 +338,8 @@ int pcie_port_device_register(struct pci_dev *dev)
pci_set_drvdata(dev, port_data);
/* Get port type */
pci_read_config_word(dev,
pci_find_capability(dev, PCI_CAP_ID_EXP) +
PCIE_CAPABILITIES_REG, &reg16);
pos = pci_pcie_cap(dev);
pci_read_config_word(dev, pos + PCIE_CAPABILITIES_REG, &reg16);
port_data->port_type = (reg16 >> 4) & PORT_TYPE_MASK;
capabilities = get_port_device_capability(dev);