linux-kernel - Re: [PATCH v15 0/9] PCI: Expose and manage PCI device reset

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Message-ID: <098c3305-55ee-9244-792b-4281a2ecd158@nvidia.com>
Date:   Thu, 12 Aug 2021 08:03:48 -0500
From:   Shanker R Donthineni <sdonthineni@...dia.com>
To:     Bjorn Helgaas <bhelgaas@...gle.com>
CC:     Amey Narkhede <ameynarkhede03@...il.com>,
        <alex.williamson@...hat.com>,
        Raphael Norwitz <raphael.norwitz@...anix.com>,
        <linux-pci@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kw@...ux.com>, Sinan Kaya <okaya@...nel.org>,
        Len Brown <lenb@...nel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>
Subject: Re: [PATCH v15 0/9] PCI: Expose and manage PCI device reset

Hi Bjorn,

On 8/5/21 11:29 AM, Amey Narkhede wrote:
> External email: Use caution opening links or attachments
>
>
> PCI and PCIe devices may support a number of possible reset mechanisms
> for example Function Level Reset (FLR) provided via Advanced Feature or
> PCIe capabilities, Power Management reset, bus reset, or device specific reset.
> Currently the PCI subsystem creates a policy prioritizing these reset methods
> which provides neither visibility nor control to userspace.
>
> Expose the reset methods available per device to userspace, via sysfs
> and allow an administrative user or device owner to have ability to
> manage per device reset method priorities or exclusions.
> This feature aims to allow greater control of a device for use cases
> as device assignment, where specific device or platform issues may
> interact poorly with a given reset method, and for which device specific
> quirks have not been developed.
>
> Changes in v15:
>         - Fix use of uninitialized variable in patch 3/9

We would like to include this feature in the v5.15 release. Could you please look
at the updated patches and provide review feedback?

Thanks,
Shanker Donthineni