diff options
| author | Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> | 2009-10-05 08:46:43 (GMT) |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2009-11-04 17:02:35 (GMT) |
| commit | 8792e11f1c54bcba34412f03959e70ee217f2231 (patch) | |
| tree | aa81ae55e49567231b7899b40beb72a64e470e00 /drivers/pci | |
| parent | 65b947bc5f32d8d4fe1f925a6146a4088d5466f3 (diff) | |
| download | linux-8792e11f1c54bcba34412f03959e70ee217f2231.tar.xz | |
PCI: pciehp: prevent unnecessary power off
Prevent unnecessary power off at initialization time. If slot power
is already off, we don't need to power off the slot.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/hotplug/pciehp_core.c | 26 |
1 files changed, 10 insertions, 16 deletions
diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c index e1b29a5..5674b20 100644 --- a/drivers/pci/hotplug/pciehp_core.c +++ b/drivers/pci/hotplug/pciehp_core.c @@ -253,14 +253,13 @@ static int pciehp_probe(struct pcie_device *dev) int rc; struct controller *ctrl; struct slot *slot; - u8 value; - struct pci_dev *pdev = dev->port; + u8 occupied, poweron; if (pciehp_force) dev_info(&dev->device, "Bypassing BIOS check for pciehp use on %s\n", - pci_name(pdev)); - else if (pciehp_get_hp_hw_control_from_firmware(pdev)) + pci_name(dev->port)); + else if (pciehp_get_hp_hw_control_from_firmware(dev->port)) goto err_out_none; ctrl = pcie_init(dev); @@ -290,18 +289,13 @@ static int pciehp_probe(struct pcie_device *dev) /* Check if slot is occupied */ slot = ctrl->slot; - pciehp_get_adapter_status(slot, &value); - if (value) { - if (pciehp_force) - pciehp_enable_slot(slot); - } else { - /* Power off slot if not occupied */ - if (POWER_CTRL(ctrl)) { - rc = pciehp_power_off_slot(slot); - if (rc) - goto err_out_free_ctrl_slot; - } - } + pciehp_get_adapter_status(slot, &occupied); + pciehp_get_power_status(slot, &poweron); + if (occupied && pciehp_force) + pciehp_enable_slot(slot); + /* If empty slot's power status is on, turn power off */ + if (!occupied && poweron && POWER_CTRL(ctrl)) + pciehp_power_off_slot(slot); return 0; |