linux-kernel - Re: [PATCH v2 2/2] pci: Support "removable" attribute for PCI devices

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Date:   Mon, 26 Apr 2021 13:49:15 +0200
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Oliver Neukum <oneukum@...e.com>
Cc:     Rajat Jain <rajatja@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PCI <linux-pci@...r.kernel.org>,
        "open list:ULTRA-WIDEBAND (UWB) SUBSYSTEM:" 
        <linux-usb@...r.kernel.org>, Bjorn Helgaas <helgaas@...nel.org>,
        Rajat Jain <rajatxjain@...il.com>,
        Jesse Barnes <jsbarnes@...gle.com>,
        Dmitry Torokhov <dtor@...gle.com>
Subject: Re: [PATCH v2 2/2] pci: Support "removable" attribute for PCI devices

On Mon, Apr 26, 2021 at 11:17 AM Oliver Neukum <oneukum@...e.com> wrote:
>
> Am Freitag, den 23.04.2021, 19:16 -0700 schrieb Rajat Jain:
> > Export the already available info, to the userspace via the
> > device core, so that userspace can implement whatever policies it
> > wants to, for external removable devices.
>
> Hi,
>
> is there a way to tell apart whether a device can undergo regular
> surprise removal?

PCI devices located under a removable parent can undergo surprise
removal.  The ones on a Thunderbolt chain too.

> Do we want that?

Do you mean surprise removal?  Yes, we do.