linux-kernel - Re: [PATCH 7/7] PCI / PM: Use SMART_SUSPEND and LEAVE

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Message-ID: <20180104221448.GH189897@bhelgaas-glaptop.roam.corp.google.com>
Date:   Thu, 4 Jan 2018 16:14:48 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Kevin Hilman <khilman@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-i2c <linux-i2c@...r.kernel.org>,
        Linux PCI <linux-pci@...r.kernel.org>,
        Lee Jones <lee.jones@...aro.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Wolfram Sang <wsa@...-dreams.de>
Subject: Re: [PATCH 7/7] PCI / PM: Use SMART_SUSPEND and LEAVE_SUSPENDED
 flags for PCIe ports

On Wed, Jan 03, 2018 at 01:38:27AM +0100, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> Make the PCIe port driver set DPM_FLAG_SMART_SUSPEND and
> DPM_FLAG_LEAVE_SUSPENDED for the devices handled by it to benefit
> from the opportunistic optimizations in the PCI layer enabled by
> these flags.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Acked-by: Bjorn Helgaas <bhelgaas@...gle.com>

Please merge this along with the rest of the series.

> ---
>  drivers/pci/pcie/portdrv_pci.c |    3 +++
>  1 file changed, 3 insertions(+)
> 
> Index: linux-pm/drivers/pci/pcie/portdrv_pci.c
> ===================================================================
> --- linux-pm.orig/drivers/pci/pcie/portdrv_pci.c
> +++ linux-pm/drivers/pci/pcie/portdrv_pci.c
> @@ -150,6 +150,9 @@ static int pcie_portdrv_probe(struct pci
>  
>  	pci_save_state(dev);
>  
> +	dev_pm_set_driver_flags(&dev->dev, DPM_FLAG_SMART_SUSPEND |
> +					   DPM_FLAG_LEAVE_SUSPENDED);
> +
>  	if (pci_bridge_d3_possible(dev)) {
>  		/*
>  		 * Keep the port resumed 100ms to make sure things like
>