linux-kernel - Re: [PATCH v3 0/3] fw

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Date:   Fri, 24 Sep 2021 08:09:05 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Saravana Kannan <saravanak@...gle.com>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>, Len Brown <lenb@...nel.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        kernel-team@...roid.com, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org, linux-acpi@...r.kernel.org
Subject: Re: [PATCH v3 0/3] fw_devlink bug fixes

On Thu, Sep 23, 2021 at 10:44:48PM +0300, Vladimir Oltean wrote:
> On Thu, Sep 23, 2021 at 07:30:04PM +0200, Greg Kroah-Hartman wrote:
> > It fixes the real problem where drivers were making the wrong assumption
> > that if they registered a device, it would be instantly bound to a
> > driver.  Drivers that did this were getting lucky, as this was never a
> > guarantee of the driver core (think about if you enabled async
> > probing, and the mess with the bus specific locks that should be
> > preventing much of this)
> 
> Since commit d173a137c5bd ("driver-core: enable drivers to opt-out of
> async probe") it is possible to opt out of async probing, and PHY
> drivers do opt out of it, at the time of writing.

That's good, but we are talking about system-wide enabling of async
probing in the future, which might cause problems here :)

Anyway, let's go with this option for now and Saravana has assured me
that he will work on fixing up these drivers/bus to work properly going
forward.

thanks,

greg k-h