linux-kernel - Re: [PATCH 02/12] PCI / PM: Use the NEVER

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Date:   Mon, 23 Oct 2017 18:40:24 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux PM <linux-pm@...r.kernel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ACPI <linux-acpi@...r.kernel.org>,
        Linux PCI <linux-pci@...r.kernel.org>,
        Linux Documentation <linux-doc@...r.kernel.org>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Kevin Hilman <khilman@...nel.org>,
        Wolfram Sang <wsa@...-dreams.de>,
        "linux-i2c@...r.kernel.org" <linux-i2c@...r.kernel.org>,
        Lee Jones <lee.jones@...aro.org>
Subject: Re: [PATCH 02/12] PCI / PM: Use the NEVER_SKIP driver flag

On 16 October 2017 at 03:29, Rafael J. Wysocki <rjw@...ysocki.net> wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
>
> Replace the PCI-specific flag PCI_DEV_FLAGS_NEEDS_RESUME with the
> PM core's DPM_FLAG_NEVER_SKIP one everywhere and drop it.
>
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Reviewed-by: Ulf Hansson <ulf.hansson@...aro.org>

> ---
>  drivers/gpu/drm/i915/i915_drv.c |    2 +-
>  drivers/misc/mei/pci-me.c       |    2 +-
>  drivers/misc/mei/pci-txe.c      |    2 +-
>  drivers/pci/pci.c               |    3 +--
>  include/linux/pci.h             |    7 +------
>  5 files changed, 5 insertions(+), 11 deletions(-)
>
> Index: linux-pm/include/linux/pci.h
> ===================================================================
> --- linux-pm.orig/include/linux/pci.h
> +++ linux-pm/include/linux/pci.h
> @@ -205,13 +205,8 @@ enum pci_dev_flags {
>         PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
>         /* Do not use FLR even if device advertises PCI_AF_CAP */
>         PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
> -       /*
> -        * Resume before calling the driver's system suspend hooks, disabling
> -        * the direct_complete optimization.
> -        */
> -       PCI_DEV_FLAGS_NEEDS_RESUME = (__force pci_dev_flags_t) (1 << 11),
>         /* Don't use Relaxed Ordering for TLPs directed at this device */
> -       PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 12),
> +       PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
>  };
>
>  enum pci_irq_reroute_variant {
> Index: linux-pm/drivers/pci/pci.c
> ===================================================================
> --- linux-pm.orig/drivers/pci/pci.c
> +++ linux-pm/drivers/pci/pci.c
> @@ -2166,8 +2166,7 @@ bool pci_dev_keep_suspended(struct pci_d
>
>         if (!pm_runtime_suspended(dev)
>             || pci_target_state(pci_dev, wakeup) != pci_dev->current_state
> -           || platform_pci_need_resume(pci_dev)
> -           || (pci_dev->dev_flags & PCI_DEV_FLAGS_NEEDS_RESUME))
> +           || platform_pci_need_resume(pci_dev))
>                 return false;
>
>         /*
> Index: linux-pm/drivers/gpu/drm/i915/i915_drv.c
> ===================================================================
> --- linux-pm.orig/drivers/gpu/drm/i915/i915_drv.c
> +++ linux-pm/drivers/gpu/drm/i915/i915_drv.c
> @@ -1304,7 +1304,7 @@ int i915_driver_load(struct pci_dev *pde
>          * becaue the HDA driver may require us to enable the audio power
>          * domain during system suspend.
>          */
> -       pdev->dev_flags |= PCI_DEV_FLAGS_NEEDS_RESUME;
> +       dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
>
>         ret = i915_driver_init_early(dev_priv, ent);
>         if (ret < 0)
> Index: linux-pm/drivers/misc/mei/pci-txe.c
> ===================================================================
> --- linux-pm.orig/drivers/misc/mei/pci-txe.c
> +++ linux-pm/drivers/misc/mei/pci-txe.c
> @@ -141,7 +141,7 @@ static int mei_txe_probe(struct pci_dev
>          * MEI requires to resume from runtime suspend mode
>          * in order to perform link reset flow upon system suspend.
>          */
> -       pdev->dev_flags |= PCI_DEV_FLAGS_NEEDS_RESUME;
> +       dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
>
>         /*
>         * For not wake-able HW runtime pm framework
> Index: linux-pm/drivers/misc/mei/pci-me.c
> ===================================================================
> --- linux-pm.orig/drivers/misc/mei/pci-me.c
> +++ linux-pm/drivers/misc/mei/pci-me.c
> @@ -223,7 +223,7 @@ static int mei_me_probe(struct pci_dev *
>          * MEI requires to resume from runtime suspend mode
>          * in order to perform link reset flow upon system suspend.
>          */
> -       pdev->dev_flags |= PCI_DEV_FLAGS_NEEDS_RESUME;
> +       dev_pm_set_driver_flags(&pdev->dev, DPM_FLAG_NEVER_SKIP);
>
>         /*
>         * For not wake-able HW runtime pm framework
>