[+to Rafael, author of commits mentioned below]
On Wed, Jul 24, 2019 at 05:38:38PM -0600, Kelsey Skunberg wrote:
> The #define PCI_PM_* lines are only used within drivers/pci/ and they do
> not need to be seen by the rest of the kernel. Move #define PCI_* to
> drivers/pci/pci.h
>
> Signed-off-by: Kelsey Skunberg <skunberg.kelsey@xxxxxxxxx>
> ---
> drivers/pci/pci.h | 5 +++++
> include/linux/pci.h | 5 -----
> 2 files changed, 5 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
> index 1be03a97cb92..708413632429 100644
> --- a/drivers/pci/pci.h
> +++ b/drivers/pci/pci.h
> @@ -39,6 +39,11 @@ int pci_probe_reset_function(struct pci_dev *dev);
> int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
> int pci_bus_error_reset(struct pci_dev *dev);
>
> +#define PCI_PM_D2_DELAY 200
> +#define PCI_PM_D3_WAIT 10
> +#define PCI_PM_D3COLD_WAIT 100
> +#define PCI_PM_BUS_WAIT 50
Unrelated to *this* patch, but while reviewing, I noticed this a few
lines below:
static inline void pci_wakeup_event(struct pci_dev *dev)
{
/* Wait 100 ms before the system can be put into a sleep state. */
pm_wakeup_event(&dev->dev, 100);
}
I'm curious about what this 100ms is and whether it's related to
something in the PCIe spec. E.g., is this another way of writing
PCI_PM_D3COLD_WAIT?
This constant was added to drivers/pci/pci.c as PCI_WAKEUP_COOLDOWN by
c125e96f0444 ("PM: Make it possible to avoid races between wakeup and
system sleep") and then moved to drivers/pci/pci.h and the name
removed by b6e335aeeb11 ("PCI/PM: Use pm_wakeup_event() directly for
reporting wakeup events").
> /**
> * struct pci_platform_pm_ops - Firmware PM callbacks
> *
> diff --git a/include/linux/pci.h b/include/linux/pci.h
> index 9e700d9f9f28..238449460210 100644
> --- a/include/linux/pci.h
> +++ b/include/linux/pci.h
> @@ -145,11 +145,6 @@ static inline const char *pci_power_name(pci_power_t state)
> return pci_power_names[1 + (__force int) state];
> }
>
> -#define PCI_PM_D2_DELAY 200
> -#define PCI_PM_D3_WAIT 10
> -#define PCI_PM_D3COLD_WAIT 100
> -#define PCI_PM_BUS_WAIT 50
> -
> /**
> * typedef pci_channel_state_t
> *
> --
> 2.20.1
>
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