Re: [PATCH 07/10] PCI: pciehp: Implement runtime PM callbacks

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On Thursday, September 6, 2018 5:50:17 PM CEST Mika Westerberg wrote:
> Basically we need to do the same thing when runtime suspending than with
> system sleep so re-use those operations here. This makes sure hotplug
> interrupt does not trigger immediately when the link goes down.
> 
> Signed-off-by: Mika Westerberg <mika.westerberg@xxxxxxxxxxxxxxx>
> ---
>  drivers/pci/hotplug/pciehp_core.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/drivers/pci/hotplug/pciehp_core.c b/drivers/pci/hotplug/pciehp_core.c
> index c9cf9c3b5f7f..25b2ea9f9242 100644
> --- a/drivers/pci/hotplug/pciehp_core.c
> +++ b/drivers/pci/hotplug/pciehp_core.c
> @@ -349,6 +349,23 @@ static int pciehp_resume(struct pcie_device *dev)
>  
>  	return 0;
>  }
> +
> +static int pciehp_runtime_resume(struct pcie_device *dev)
> +{
> +	struct controller *ctrl = get_service_data(dev);
> +	struct slot *slot = ctrl->slot;
> +
> +	/* pci_restore_state() just wrote to the Slot Control register */
> +	ctrl->cmd_started = jiffies;
> +	ctrl->cmd_busy = true;
> +
> +	/* clear spurious events from rediscovery of inserted card */
> +	if ((slot->state == ON_STATE || slot->state == BLINKINGOFF_STATE) &&
> +	     pme_is_native(dev))
> +		pcie_clear_hotplug_events(ctrl);
> +
> +	return pciehp_resume(dev);
> +}
>  #endif /* PM */
>  
>  static struct pcie_port_service_driver hpdriver_portdrv = {
> @@ -363,6 +380,8 @@ static struct pcie_port_service_driver hpdriver_portdrv = {
>  	.suspend	= pciehp_suspend,
>  	.resume_noirq	= pciehp_resume_noirq,
>  	.resume		= pciehp_resume,
> +	.runtime_suspend = pciehp_suspend,
> +	.runtime_resume	= pciehp_runtime_resume,
>  #endif	/* PM */
>  };
>  
> 

Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>





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