linux-kernel - Re: [PATCH v3 4/7] xen/pciback: Implement PCI reset slot or bus with 'do

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Message-ID: <53BC324B.5090600@citrix.com>
Date:	Tue, 8 Jul 2014 19:02:51 +0100
From:	David Vrabel <david.vrabel@...rix.com>
To:	<konrad@...nel.org>, <xen-devel@...ts.xenproject.org>,
	<boris.ostrovsky@...cle.com>, <linux-kernel@...r.kernel.org>
CC:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
Subject: Re: [PATCH v3 4/7] xen/pciback: Implement PCI reset slot or bus with
 'do_flr' SysFS attribute

On 08/07/14 19:58, konrad@...nel.org wrote:
> --- a/Documentation/ABI/testing/sysfs-driver-pciback
> +++ b/Documentation/ABI/testing/sysfs-driver-pciback
> @@ -82,3 +82,14 @@ Description:
>                  device is shared, enabled, or on a level interrupt line.
>                  Writing a string of DDDD:BB:DD.F will toggle the state.
>                  This is Domain:Bus:Device.Function where domain is optional.
> +
> +What:           /sys/bus/pci/drivers/pciback/do_flr
> +Date:           July 2014
> +KernelVersion:  3.16
> +Contact:        xen-devel@...ts.xenproject.org
> +Description:
> +                An option to slot or bus reset an PCI device owned by
> +                Xen PCI backend. Writing a string of DDDD:BB:DD.F will cause
> +                the driver to perform an slot or bus reset if the device
> +                supports. It also checks to make sure that all of the devices
> +                under the bridge are owned by Xen PCI backend.

Not sure I like this new interface.  I solved this by adding a new reset
file that looked like the regular one the pci would have if it supported
FLR.  I'm fairly sure I posted a series for this.  Was there a reason
you didn't do this?

David
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