From: Oliver Neukum <oliver@neukum.name>
To: Alan <alan@lxorguk.ukuu.org.uk>
Cc: Luben Tuikov <luben@splentec.com>,
Matthew Dharm <mdharm-scsi@one-eyed-alien.net>,
Mike Anderson <andmike@us.ibm.com>,
David Brownell <david-b@pacbell.net>, Greg KH <greg@kroah.com>,
linux-usb-devel@lists.sourceforge.net,
Linux SCSI list <linux-scsi@vger.kernel.org>
Subject: Re: Re: [PATCH] USB changes for 2.5.58
Date: Tue, 21 Jan 2003 08:17:12 +0100 [thread overview]
Message-ID: <200301210817.12096.oliver@neukum.name> (raw)
In-Reply-To: <1043119913.13397.14.camel@dhcp22.swansea.linux.org.uk>
Am Dienstag, 21. Januar 2003 04:31 schrieb Alan:
> On Mon, 2003-01-20 at 18:23, Oliver Neukum wrote:
> > > The transport can notify that the device is gone, but an ULP entity
> > > will call scsi_remove_device() not the other way around.
> >
> > NO!
> >
> > This is an insanely complicated scheme.
> > We have no notification beforehand. User yanks out cable.
> > That's it. No preperation at all.
> >
> > We as the writers of device drivers need a way to get rid of the device
> > as we are notified of the physical disconnect. It is not our job to
> > maintain devices in an undead state.
>
> If you think about it rationally there isnt a lot that can be done higher
> up. At the point the hardware vanishes there may be other threads of
> execution already in your driver, so undead state is a reality you have to
> live with, at least briefly.
No problem with that. I have a problem with notifying the SCSI layer
and then waiting for an unlimited time until maybe the SCSI layer decides
to inform me of a success. You see, disconnection has to work.
Having to wait for an unlimited time is a kind of failure.
I simply don't trust the SCSI layer. I've had to much trouble with it
already.
Regards
Oliver
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next prev parent reply other threads:[~2003-01-21 7:17 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <10426732153816@kroah.com>
[not found] ` <10426732212871@kroah.com>
[not found] ` <20030116093112.B29001@one-eyed-alien.net>
[not found] ` <20030116173539.GA31235@kroah.com>
2003-01-16 19:43 ` [linux-usb-devel] Re: [PATCH] USB changes for 2.5.58 Matthew Dharm
2003-01-16 19:53 ` Greg KH
[not found] ` <20030116195306.GA32697@kroah.com>
2003-01-16 20:10 ` Linus Torvalds
2003-01-16 20:43 ` greg kh
2003-01-16 21:41 ` Linus Torvalds
2003-01-16 22:51 ` Matthew Dharm
2003-01-16 20:40 ` David Brownell
2003-01-16 20:48 ` Mike Anderson
2003-01-16 23:43 ` Oliver Neukum
2003-01-17 8:50 ` Mike Anderson
2003-01-17 10:55 ` Oliver Neukum
2003-01-17 15:06 ` Alan Stern
2003-01-17 18:54 ` Matthew Dharm
2003-01-17 20:25 ` Mike Anderson
2003-01-17 22:07 ` Oliver Neukum
2003-01-17 20:26 ` [linux-usb-devel] " Oliver Neukum
2003-01-17 20:49 ` Mike Anderson
2003-01-20 17:36 ` Luben Tuikov
2003-01-20 18:23 ` Oliver Neukum
2003-01-20 18:56 ` Luben Tuikov
2003-01-20 19:10 ` [linux-usb-devel] " Oliver Neukum
2003-01-20 19:50 ` David Brownell
2003-01-21 3:31 ` Alan
2003-01-21 7:17 ` Oliver Neukum [this message]
2003-01-21 11:57 ` Douglas Gilbert
2003-01-21 13:48 ` Oliver Neukum
2003-01-21 18:22 ` Luben Tuikov
2003-01-21 13:30 ` James Bottomley
2003-01-20 20:08 ` David Brownell
2003-01-20 20:48 ` [linux-usb-devel] " Oliver Neukum
2003-01-20 21:24 ` David Brownell
2003-01-20 21:51 ` [linux-usb-devel] " Oliver Neukum
2003-01-20 22:26 ` David Brownell
2003-01-20 23:00 ` Oliver Neukum
2003-01-21 0:44 ` David Brownell
2003-01-21 0:50 ` Oliver Neukum
2003-01-21 18:16 ` Luben Tuikov
2003-01-21 19:00 ` Oliver Neukum
2003-01-21 20:02 ` [linux-usb-devel] " Luben Tuikov
2003-01-21 21:02 ` Alan Stern
2003-01-22 21:50 ` Luben Tuikov
2003-01-22 22:46 ` Oliver Neukum
2003-01-23 17:46 ` Luben Tuikov
2003-01-23 18:19 ` Oliver Neukum
2003-01-23 19:07 ` Luben Tuikov
2003-01-23 19:40 ` Oliver Neukum
2003-01-23 20:28 ` Doug Ledford
2003-01-23 20:59 ` Oliver Neukum
2003-01-23 21:34 ` Doug Ledford
2003-01-23 22:39 ` Oliver Neukum
2003-01-23 23:23 ` Doug Ledford
2003-01-23 23:25 ` Matthew Dharm
2003-01-24 15:34 ` Alan Stern
2003-01-24 16:06 ` Oliver Neukum
2003-01-24 17:58 ` [linux-usb-devel] " Doug Ledford
2003-01-24 19:00 ` Luben Tuikov
2003-01-24 22:23 ` Oliver.Neukum
2003-01-24 19:10 ` Luben Tuikov
2003-01-24 19:56 ` [linux-usb-devel] " Alan Stern
2003-01-24 20:11 ` Luben Tuikov
2003-01-24 21:09 ` Luben Tuikov
2003-01-24 21:55 ` Alan Stern
2003-01-24 22:03 ` Luben Tuikov
2003-01-24 23:21 ` Mike Anderson
2003-01-24 21:48 ` Doug Ledford
2003-01-24 22:59 ` Mike Anderson
2003-01-24 23:17 ` [linux-usb-devel] " Doug Ledford
2003-01-25 0:24 ` Luben Tuikov
2003-01-25 1:35 ` Mike Anderson
2003-01-24 23:25 ` Matthew Dharm
2003-01-25 0:05 ` Doug Ledford
2003-01-25 0:45 ` Matthew Dharm
2003-01-25 1:07 ` Doug Ledford
2003-02-02 18:13 ` Matthew Dharm
2003-02-02 20:06 ` Matthew Dharm
2003-02-03 17:17 ` Mike Anderson
2003-02-16 21:18 ` Matthew Dharm
2003-02-17 19:37 ` Mike Anderson
2003-02-17 19:51 ` Patrick Mansfield
2003-02-23 7:48 ` Matthew Dharm
2003-02-26 23:37 ` Mike Anderson
2003-02-27 1:10 ` Matthew Dharm
2003-02-27 6:37 ` Mike Anderson
2003-02-27 19:32 ` Matthew Dharm
2003-03-01 1:41 ` Matthew Dharm
2003-02-02 3:49 ` Matthew Dharm
2003-01-25 1:24 ` Luben Tuikov
2003-01-24 0:15 ` Patrick Mansfield
2003-01-24 8:33 ` David Brownell
2003-01-23 20:41 ` A different look at block device hotswap in the Linux kernel Steven Dake
2003-01-23 21:07 ` Matthew Jacob
2003-01-23 21:06 ` Steven Dake
2003-01-23 21:16 ` Matthew Jacob
2003-01-24 0:07 ` Oliver Neukum
2003-01-24 0:21 ` Matthew Jacob
2003-01-24 7:53 ` David Brownell
2003-01-24 15:26 ` Matthew Jacob
2003-01-24 0:54 ` Steven Dake
2003-01-24 2:35 ` [linux-usb-devel] " Matthew Dharm
2003-01-22 21:30 ` [linux-usb-devel] Re: [PATCH] USB changes for 2.5.58 David Brownell
2003-01-20 22:16 ` Luben Tuikov
2003-01-20 22:51 ` David Brownell
2003-01-20 23:27 ` Oliver Neukum
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