On Fri, 18 Oct 2019 10:30:11 +0200,
Kai-Heng Feng wrote:
>
>
>
> > On Oct 18, 2019, at 16:18, Takashi Iwai <tiwai@xxxxxxx> wrote:
> >
> > On Fri, 18 Oct 2019 09:38:47 +0200,
> > Kai-Heng Feng wrote:
> >>
> >> A driver may want to know the existence of _PR3, to choose different
> >> runtime suspend behavior. A user will be add in next patch.
> >>
> >> This is mostly the same as nouveau_pr3_present().
> >>
> >> Reported-by: kbuild test robot <lkp@xxxxxxxxx>
> >
> > It's confusing -- this particular change isn't reported by the test
> > bot, but only about the lack of the CONFIG_ACPI ifdef.
>
> Hmm, because the test bot asked to add the tag.
Yes, but it's only if you add a new fix patch on top of it.
You can write some their credit, too, but basically it'd be enough to
point to the Link tag to the thread.
> If it's not appropriate will you drop it? I can also send a v7.
I can modify in my side.
thanks,
Takashi
>
> Kai-Heng
>
> >
> >
> > thanks,
> >
> > Takashi
> >
> >> Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
> >> ---
> >> v6:
> >> - Only define the function when CONFIG_ACPI is set.
> >> v5:
> >> - Add wording suggestion from Bjorn.
> >> v4:
> >> - Let caller to find its upstream port device.
> >>
> >> drivers/pci/pci.c | 18 ++++++++++++++++++
> >> include/linux/pci.h | 2 ++
> >> 2 files changed, 20 insertions(+)
> >>
> >> diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
> >> index e7982af9a5d8..1df99d9e350e 100644
> >> --- a/drivers/pci/pci.c
> >> +++ b/drivers/pci/pci.c
> >> @@ -5856,6 +5856,24 @@ int pci_set_vga_state(struct pci_dev *dev, bool decode,
> >> return 0;
> >> }
> >>
> >> +#ifdef CONFIG_ACPI
> >> +bool pci_pr3_present(struct pci_dev *pdev)
> >> +{
> >> + struct acpi_device *adev;
> >> +
> >> + if (acpi_disabled)
> >> + return false;
> >> +
> >> + adev = ACPI_COMPANION(&pdev->dev);
> >> + if (!adev)
> >> + return false;
> >> +
> >> + return adev->power.flags.power_resources &&
> >> + acpi_has_method(adev->handle, "_PR3");
> >> +}
> >> +EXPORT_SYMBOL_GPL(pci_pr3_present);
> >> +#endif
> >> +
> >> /**
> >> * pci_add_dma_alias - Add a DMA devfn alias for a device
> >> * @dev: the PCI device for which alias is added
> >> diff --git a/include/linux/pci.h b/include/linux/pci.h
> >> index f9088c89a534..1d15c5d49cdd 100644
> >> --- a/include/linux/pci.h
> >> +++ b/include/linux/pci.h
> >> @@ -2310,9 +2310,11 @@ struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
> >>
> >> void
> >> pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
> >> +bool pci_pr3_present(struct pci_dev *pdev);
> >> #else
> >> static inline struct irq_domain *
> >> pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
> >> +static bool pci_pr3_present(struct pci_dev *pdev) { return false; }
> >> #endif
> >>
> >> #ifdef CONFIG_EEH
> >> --
> >> 2.17.1
> >>
>
