Messages in this thread |  | | | Date | Thu, 6 Oct 2011 09:10:05 -0700 | | Subject | Re: [PATCH] PCI: Set device power state to PCI_D0 for device without native PM support | | From | Yinghai Lu <> |
| |
On Wed, Oct 5, 2011 at 12:41 PM, Rafael J. Wysocki <rjw@sisk.pl> wrote: > Hi, >> drivers/pci/pci.c | 3 +++ >> 1 files changed, 3 insertions(+), 0 deletions(-) >> >> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c >> index e9651f0..ca8c82d 100644 >> --- a/drivers/pci/pci.c >> +++ b/drivers/pci/pci.c >> @@ -664,6 +664,9 @@ static int pci_platform_power_transition(struct pci_dev *dev, pci_power_t state) >> error = platform_pci_set_power_state(dev, state); >> if (!error) >> pci_update_current_state(dev, state); >> + /* Fall back to PCI_D0 if native PM is not supported */ >> + else if (!dev->pm_cap) >> + dev->current_state = PCI_D0; >> } else { >> error = -ENODEV; >> /* Fall back to PCI_D0 if native PM is not supported */ >> > > I have some vague memories that we tried that and it broke something.
Do have any hint for us to dig out the configuration for failing?
> > How thoroughly has it been tested?
tested in setups with intel cpus from Nehalem.
Yinghai -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |