linux-kernel - Re: [Xen-devel] [PATCH] Xen PCIbackend support for slot and bus reset (v3).

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Message-ID: <819511949.20140708211540@eikelenboom.it>
Date:	Tue, 8 Jul 2014 21:15:40 +0200
From:	Sander Eikelenboom <linux@...elenboom.it>
To:	konrad@...nel.org
CC:	xen-devel@...ts.xenproject.org, david.vrabel@...rix.com,
	<boris.ostrovsky@...cle.com>, <linux-kernel@...r.kernel.org>
Subject: Re: [Xen-devel] [PATCH] Xen PCIbackend support for slot and bus reset (v3).


Tuesday, July 8, 2014, 8:58:22 PM, you wrote:

> These patches had been posted in the past and had been reworked
> to address reviews. The original concerns with the patches was
> the complex logic of doing an workqueue (or thread) that would
> do the FLR/bus/slot reset outside the PCI lock. That idea proved
> buggy. The other idea of usurping the 'reset' SysFS didn't work
> either - as the the generic code will complain loudly about this.

> The best so far mechanism is to use the 'xl' toolstack usage
> of 'do_flr' and make that work in Xen pciback.

>  Documentation/ABI/testing/sysfs-driver-pciback |   95 ++++++++++++++
>  drivers/xen/xen-pciback/pci_stub.c             |  163 +++++++++++++++++++-----
>  drivers/xen/xen-pciback/xenbus.c               |    2 +-
>  3 files changed, 224 insertions(+), 36 deletions(-)

> Konrad Rzeszutek Wilk (7):
>       xen-pciback: Document the various parameters and attributes in SysFS
>       xen/pciback: Don't deadlock when unbinding.
>       xen/pciback: Move the FLR code to a function.
>       xen/pciback: Implement PCI reset slot or bus with 'do_flr' SysFS attribute
>       xen/pciback: Include the domain id if removing the device whilst still in use
>       xen/pciback: Print out the domain owning the device.
>       xen/pciback: Remove tons of dereferences

Could you push these to your kernel.org git tree ?

--
Sander



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