linux-kernel - Re: [PATCH v5 2/5] driver core: Functional dependencies tracking support

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Message-ID: <20161027152551.GA15718@kroah.com>
Date:   Thu, 27 Oct 2016 17:25:51 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Lukas Wunner <lukas@...ner.de>
Cc:     "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Linux PM list <linux-pm@...r.kernel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        Mark Brown <broonie@...nel.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Kevin Hilman <khilman@...nel.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        "Luis R. Rodriguez" <mcgrof@...e.com>
Subject: Re: [PATCH v5 2/5] driver core: Functional dependencies tracking
 support

On Wed, Oct 26, 2016 at 01:19:02PM +0200, Lukas Wunner wrote:
> Hi Rafael,
> 
> sorry for not responding to v5 of your series earlier, just sending
> this out now in the hope that it reaches you before your travels.
> 
> On Mon, Oct 10, 2016 at 02:51:04PM +0200, Rafael J. Wysocki wrote:
> > - Modify device_links_check_suppliers(), device_links_driver_bound(),
> >   device_links_no_driver(), device_links_driver_cleanup(), device_links_busy(),
> >   and device_links_unbind_consumers() to walk link lists under device_links_lock
> >   (to make the new "driver presence tracking" mechanism work reliably).
> 
> This change might increase boot time if drivers return -EPROBE_DEFER.

"might"?  Please verify this before guessing....

And don't make this more complex than needed before actually determining
a real issue.

thanks,

greg k-h