linux-kernel - Re: [PATCHv3 0/4] drivers/base: bugfix for supplier<-consumer ordering in device

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Message-ID: <4685360.VNmeYLh0dQ@aspire.rjw.lan>
Date:   Tue, 03 Jul 2018 16:35:05 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     Pingfan Liu <kernelfans@...il.com>
Cc:     linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Christoph Hellwig <hch@...radead.org>,
        Bjorn Helgaas <helgaas@...nel.org>,
        Dave Young <dyoung@...hat.com>, linux-pci@...r.kernel.org,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCHv3 0/4] drivers/base: bugfix for supplier<-consumer ordering in device_kset

On Tuesday, July 3, 2018 8:50:38 AM CEST Pingfan Liu wrote:
> commit 52cdbdd49853 ("driver core: correct device's shutdown order")
> places an assumption of supplier<-consumer order on the process of probe.
> But it turns out to break down the parent <- child order in some scene.
> E.g in pci, a bridge is enabled by pci core, and behind it, the devices
> have been probed. Then comes the bridge's module, which enables extra
> feature(such as hotplug) on this bridge.

So what *exactly* does happen in that case?