From: Greg KH <greg@kroah.com>
To: Arjan van de Ven <arjan@infradead.org>
Cc: Matthew Wilcox <matthew@wil.cx>,
James Bottomley <James.Bottomley@SteelEye.com>,
linux-hotplug-devel@lists.sourceforge.net,
linux-scsi@vger.kernel.org,
Patrick Mansfield <patmans@us.ibm.com>,
Stefan Richter <stefanr@s5r6.in-berlin.de>,
"Alexander E. Patrakov" <patrakov@ums.usu.ru>
Subject: Re: Asynchronous scsi scanning, version 9
Date: Mon, 26 Jun 2006 16:03:53 +0000 [thread overview]
Message-ID: <20060626160353.GB3456@kroah.com> (raw)
In-Reply-To: <1151326751.3185.37.camel@laptopd505.fenrus.org>
On Mon, Jun 26, 2006 at 02:59:11PM +0200, Arjan van de Ven wrote:
>
> > Fortunately, USB is SCSI, so we can actually use this code to solve that
> > problem too. I wasn't thinking of USB when I wrote the code (because I
> > didn't know there was a problem). But really, it's very generic stuff;
> > there's a list_head, a pointer to a Scsi_Host and a completion.
> >
> > I'm not 100% sure what the problem is with USB.
>
> I seem to remember that the problem with USB was that you can't even
> know how many things are still outstanding; devices are free to appear
> on the bus at any time after bus power on, without specified timeout...
> If the kernel can't know what's out there, it can't wait until it has a
> complete picture either, just by virtue of not being able to know when
> that is achieved ;-)
This is true.
thanks,
greg k-h
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next prev parent reply other threads:[~2006-06-26 16:03 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20060511143352.GI12272@parisc-linux.org>
[not found] ` <20060518172258.GL1604@parisc-linux.org>
[not found] ` <20060529031915.GB23405@parisc-linux.org>
[not found] ` <447AB2F5.2000700@s5r6.in-berlin.de>
[not found] ` <20060529130515.GE23405@parisc-linux.org>
2006-05-31 23:21 ` Asynchronous scsi scanning, version 9 Patrick Mansfield
2006-06-01 12:22 ` Kay Sievers
2006-10-26 19:53 ` maximilian attems
2006-06-01 13:14 ` Alexander E. Patrakov
2006-06-01 13:21 ` maximilian attems
2006-06-01 13:23 ` Matthew Wilcox
2006-06-01 13:26 ` Alexander E. Patrakov
2006-06-01 14:00 ` Arjan van de Ven
2006-06-25 21:15 ` James Bottomley
2006-06-25 22:46 ` Matthew Wilcox
2006-06-26 8:24 ` Arjan van de Ven
2006-06-26 12:40 ` Matthew Wilcox
2006-06-26 12:59 ` Arjan van de Ven
2006-06-26 16:03 ` Greg KH [this message]
2006-06-26 14:44 ` Matthew Dharm
2006-06-26 15:18 ` Matthew Wilcox
2006-06-26 15:44 ` James Bottomley
2006-06-26 16:02 ` Greg KH
2006-06-26 21:08 ` Matthew Dharm
2006-06-26 22:15 ` Matthew Wilcox
2006-06-26 18:55 ` [SPAM] " Doug Ledford
2006-06-26 21:04 ` Matthew Dharm
2006-06-26 21:20 ` Doug Ledford
2006-06-26 20:58 ` Linas Vepstas
2006-06-26 21:14 ` James Bottomley
2006-06-26 21:21 ` Linas Vepstas
2006-06-26 21:41 ` James Bottomley
2006-06-28 7:52 ` Hannes Reinecke
2006-06-28 16:03 ` James Bottomley
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