From 8792e11f1c54bcba34412f03959e70ee217f2231 Mon Sep 17 00:00:00 2001 From: Kenji Kaneshige Date: Mon, 5 Oct 2009 17:46:43 +0900 Subject: [PATCH] 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 Signed-off-by: Jesse Barnes --- drivers/pci/hotplug/pciehp_core.c | 26 ++++++++++---------------- 1 file 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; -- 1.8.2.3