Pci driver doesn't check if the device supports D3hot/D3cold power states while setting these power states. The device that doesn't support these states will fail when a driver like vfio try to do D0->D3 power transition. This patch adds a check that allows to set D3 power state only for the supported devices. Signed-off-by: Geetha sowjanya <gakula@xxxxxxxxxxxxxxxxxx> --- drivers/pci/pci.c | 3 ++- 1 files changed, 2 insertions(+), 1 deletions(-) diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 563901c..cadd046 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -661,7 +661,8 @@ static int pci_raw_set_power_state(struct pci_dev *dev, pci_power_t state) /* check if this device supports the desired state */ if ((state == PCI_D1 && !dev->d1_support) - || (state == PCI_D2 && !dev->d2_support)) + || (state == PCI_D2 && !dev->d2_support) + || (state == PCI_D3hot && !pci_pme_capable(dev, state))) return -EIO; pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr); -- 1.7.1
