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From: David Laight <David.Laight@ACULAB.COM>
To: "'Rafael J. Wysocki'" <rafael@kernel.org>,
	Oliver Neukum <oneukum@suse.com>
Cc: Rajat Jain <rajatja@google.com>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Alan Stern <stern@rowland.harvard.edu>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linux PCI <linux-pci@vger.kernel.org>,
	"open list:ULTRA-WIDEBAND (UWB) SUBSYSTEM:" 
	<linux-usb@vger.kernel.org>, "Bjorn Helgaas" <helgaas@kernel.org>,
	Rajat Jain <rajatxjain@gmail.com>,
	Jesse Barnes <jsbarnes@google.com>,
	Dmitry Torokhov <dtor@google.com>
Subject: RE: [PATCH v2 2/2] pci: Support "removable" attribute for PCI devices
Date: Mon, 26 Apr 2021 13:01:10 +0000	[thread overview]
Message-ID: <79b994f2476249498797e1784f735fd7@AcuMS.aculab.com> (raw)
In-Reply-To: <CAJZ5v0iNrSFjhmTE8K-JrO07kJon3ikhatbg0Jg2hs+x-frDJg@mail.gmail.com>

From: Rafael J. Wysocki
> Sent: 26 April 2021 12:49
> 
> On Mon, Apr 26, 2021 at 11:17 AM Oliver Neukum <oneukum@suse.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.

Always been true - think of cardbus (PCI pcmcia) cards with
PCI bridges to external PCI expansion chassis containing
additional PCI slots.
The cardbus card is hot removable.

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)

  reply	other threads:[~2021-04-26 13:01 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-24  2:16 [PATCH v2 1/2] driver core: Move the "removable" attribute from USB to core Rajat Jain
2021-04-24  2:16 ` [PATCH v2 2/2] pci: Support "removable" attribute for PCI devices Rajat Jain
2021-04-26  9:17   ` Oliver Neukum
2021-04-26 11:49     ` Rafael J. Wysocki
2021-04-26 13:01       ` David Laight [this message]
2021-04-26 19:47         ` Rajat Jain
2021-04-27 11:59         ` Oliver Neukum
2021-04-27 12:59           ` David Laight
2021-04-28  6:56             ` Oliver Neukum
2021-04-28 12:21               ` Rafael J. Wysocki
2021-04-29  9:03                 ` Oliver Neukum
2021-04-29  9:57                   ` Rafael J. Wysocki
2021-04-29 16:59                     ` Rajat Jain
2021-05-11 21:30   ` Bjorn Helgaas
2021-05-11 22:15     ` Rajat Jain
2021-05-11 23:02       ` Bjorn Helgaas
2021-05-12  0:02         ` Rajat Jain
2021-05-12 22:28           ` Rajat Jain
2021-04-25 14:58 ` [PATCH v2 1/2] driver core: Move the "removable" attribute from USB to core Alan Stern
2021-05-11 19:22 ` Bjorn Helgaas
2021-05-11 21:36   ` Rajat Jain
2021-05-12  1:00 ` Krzysztof Wilczyński
2021-05-12  1:20   ` Rajat Jain
2021-05-12 22:27     ` Rajat Jain
2021-05-12 23:32       ` Krzysztof Wilczyński

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