commit 7418cefef1ba7442a6bafd5fb9ae518e1993855a Author: Alex Chiang Date: Thu Apr 22 14:45:09 2010 -0600 pci: Ensure we re-enable devices on resume OriginalAuthor: Matthew Garrett BugLink: http://bugs.launchpad.net/bugs/566149 If the firmware puts a device back into D0 state at resume time, we'll update its state in resume_noirq and thus skip the platform resume code. Calling that code twice should be safe and we ought to avoid getting to that point anyway, so remove the check and also allow the platform pci code to be called for D0. Fixes USB not being powered after resume on recent Lenovo machines. Signed-off-by: Matthew Garrett Signed-off-by: Alex Chiang diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 4493060..b8d7b32 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -601,7 +601,7 @@ static void __pci_start_power_transition(struct pci_dev *dev, pci_power_t state) */ int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state) { - return state > PCI_D0 ? + return state >= PCI_D0 ? pci_platform_power_transition(dev, state) : -EINVAL; } EXPORT_SYMBOL_GPL(__pci_complete_power_transition); @@ -638,10 +638,6 @@ int pci_set_power_state(struct pci_dev *dev, pci_power_t state) */ return 0; - /* Check if we're already there */ - if (dev->current_state == state) - return 0; - __pci_start_power_transition(dev, state); /* This device is quirked not to be put into D3, so