linux-kernel - Re: [PATCH v1 2/2] PCI: PM: Resume bus after putting the bridge into D0 entirely

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Date:   Tue, 5 Apr 2022 12:54:19 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     "Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:     Linux PCI <linux-pci@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Bjorn Helgaas <helgaas@...nel.org>
Subject: Re: [PATCH v1 2/2] PCI: PM: Resume bus after putting the bridge into
 D0 entirely

On Mon, Apr 04, 2022 at 05:42:27PM +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> 
> It is rather counter-intuitive to attempt to resume devices on a bus
> segment before completing a transition of their parent bridge into
> D0, so do that when the transition is complete.
> 
> This matters especially when the transition in question is not
> successful, in which case it doesn't make sense to even try to
> resume the child devices at all.

Good point.

> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>

Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>