linux-kernel - [PATCH 0/9] PCI: Eliminate race conditions between hotplug and sysfs rescan/remove (Was: Re: [PATCH v2 04/10] PCI: Destroy pci dev only once)

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Message-ID: <20440867.YaQfKrcfsQ@vostro.rjw.lan>
Date:	Fri, 10 Jan 2014 15:20:44 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Bjorn Helgaas <bhelgaas@...gle.com>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Gu Zheng <guz.fnst@...fujitsu.com>,
	Guo Chao <yan@...ux.vnet.ibm.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Myron Stowe <myron.stowe@...il.com>,
	Benjamin Herrenschmidt <benh@....ibm.com>,
	linux-scsi@...r.kernel.org, Matthew Garrett <mjg59@...f.ucam.org>,
	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: [PATCH 0/9] PCI: Eliminate race conditions between hotplug and sysfs rescan/remove (Was: Re: [PATCH v2 04/10] PCI: Destroy pci dev only once)

[Cc: adding linux-scsi for the MPT changes, Ben for powerpc, Matthew for
 platform/x86 and Konrad for Xen]

On Friday, December 06, 2013 02:21:50 AM Rafael J. Wysocki wrote:

[...]

> 
> OK
> 
> To be a bit more constructive, as the next step I'd try to use
> pci_remove_rescan_mutex to serialize all PCI hotplug operations (as I said
> above) without making the other changes made by my patch.  Does that sound
> reasonable?

Well, no answer here, so as a followup, a series implementing that idea
follows.

I *hope* I found all of the places that need to be synchronized vs the bus
rescan and device removal that can be triggered via sysfs, but I might overlook
something.  Also in some cases I wasn't quite sure how much stuff to put under
the lock, because said stuff is not exactly straightforward.

Enjoy!

Rafael

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