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PCI: Use cached copy of PCI_EXP_SLTCAP_HPC bit 

We cache the PCI_EXP_SLTCAP_HPC bit in pci_dev->is_hotplug_bridge on device
probe, so there's no need to read it again on allocation of port service
devices.

No functional change intended.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Lukas Wunner 2016-05-04 16:58:11 -05:00 committed by Bjorn Helgaas
parent 4d88d5a7bf
commit f841522283
1 changed files with 8 additions and 14 deletions
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22
drivers/pci/pcie/portdrv_core.c
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@ -254,7 +254,6 @@ static void cleanup_service_irqs(struct pci_dev *dev)
static int get_port_device_capability(struct pci_dev *dev)
{
int services = 0;
u32 reg32;
int cap_mask = 0;
int err;
@ -273,19 +272,14 @@ static int get_port_device_capability(struct pci_dev *dev)
}
/* Hot-Plug Capable */
if ((cap_mask & PCIE_PORT_SERVICE_HP) &&
pcie_caps_reg(dev) & PCI_EXP_FLAGS_SLOT) {
pcie_capability_read_dword(dev, PCI_EXP_SLTCAP, &reg32);
if (reg32 & PCI_EXP_SLTCAP_HPC) {
services |= PCIE_PORT_SERVICE_HP;
/*
* Disable hot-plug interrupts in case they have been
* enabled by the BIOS and the hot-plug service driver
* is not loaded.
*/
pcie_capability_clear_word(dev, PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_CCIE | PCI_EXP_SLTCTL_HPIE);
}
if ((cap_mask & PCIE_PORT_SERVICE_HP) && dev->is_hotplug_bridge) {
services |= PCIE_PORT_SERVICE_HP;
/*
* Disable hot-plug interrupts in case they have been enabled
* by the BIOS and the hot-plug service driver is not loaded.
*/
pcie_capability_clear_word(dev, PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_CCIE | PCI_EXP_SLTCTL_HPIE);
}
/* AER capable */
if ((cap_mask & PCIE_PORT_SERVICE_AER)