From: Lee Revell <rlrevell@joe-job.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: Grant Grundler <grundler@parisc-linux.org>,
"Richard B. Johnson" <linux-os@analogic.com>,
Alexander Nyberg <alexn@dsv.su.se>, Greg KH <greg@kroah.com>,
Amit Gud <gud@eth.net>,
linux-kernel@vger.kernel.org, linux-pci@atrey.karlin.mff.cuni.cz,
akpm@osdl.org, jgarzik@pobox.com, cramerj@intel.com,
USB development list <linux-usb-devel@lists.sourceforge.net>
Subject: Re: [PATCH] PCI: Add pci shutdown ability
Date: Tue, 26 Apr 2005 13:19:48 -0400 [thread overview]
Message-ID: <1114535988.5410.4.camel@mindpipe> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0504261311290.12725-100000@iolanthe.rowland.org>
On Tue, 2005-04-26 at 13:12 -0400, Alan Stern wrote:
> On Tue, 26 Apr 2005, Grant Grundler wrote:
>
> > On Tue, Apr 26, 2005 at 12:07:41PM -0400, Richard B. Johnson wrote:
> > > DMAs don't go on "forever"
> >
> > They don't. But we also don't know when they will stop.
> > E.g. NICs will stop DMA when the RX descriptor ring is full.
> > I don't know when USB stop on it's own.
>
> USB doesn't stop DMA on its own. It goes on forever until it's told to
> stop or it encounters an error.
Ditto sound cards. Once you start capture or playback the device will
DMA to/from the assigned area forever.
Lee
next prev parent reply other threads:[~2005-04-26 17:24 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <Pine.LNX.4.44L0.0504251128070.5751-100000@iolanthe.rowland.org>
[not found] ` <SVLXCHCON1syWVLEFN00000099e@SVLXCHCON1.enterprise.veritas.com>
[not found] ` <20050425182951.GA23209@kroah.com>
[not found] ` <20050425185113.GC23209@kroah.com>
2005-04-25 19:06 ` [PATCH] PCI: Add pci shutdown ability Greg KH
2005-04-25 19:23 ` Jeff Garzik
2005-04-25 20:07 ` Greg KH
2005-04-25 20:11 ` Adam Belay
2005-04-25 19:45 ` Alexander Nyberg
2005-04-25 20:12 ` Greg KH
2005-04-26 3:59 ` Benjamin Herrenschmidt
2005-04-25 20:14 ` Alan Stern
2005-04-25 20:52 ` Alexander Nyberg
2005-04-25 21:12 ` Alan Stern
2005-04-26 15:49 ` Grant Grundler
2005-04-26 16:04 ` Alan Stern
2005-04-26 16:37 ` Grant Grundler
2005-04-26 17:14 ` Alan Stern
2005-04-26 17:41 ` Grant Grundler
2005-05-11 5:33 ` Vivek Goyal
2005-05-11 14:38 ` Alan Stern
2005-04-25 21:58 ` Andrew Morton
2005-04-25 22:13 ` Dave Jones
2005-04-25 23:23 ` Adam Belay
2005-04-26 4:32 ` Benjamin Herrenschmidt
2005-04-26 6:23 ` Adam Belay
2005-04-26 7:14 ` [linux-pm] " Nigel Cunningham
2005-04-26 9:16 ` Pavel Machek
2005-04-26 9:41 ` Pavel Machek
2005-04-26 3:52 ` Benjamin Herrenschmidt
2005-04-26 15:14 ` Alan Stern
2005-04-26 9:39 ` Pavel Machek
2005-04-26 17:50 ` Dave Jones
2005-04-26 20:23 ` Pavel Machek
2005-04-26 3:45 ` Benjamin Herrenschmidt
2005-04-26 15:11 ` Alan Stern
2005-04-26 16:01 ` Alexander Nyberg
2005-04-26 15:41 ` Grant Grundler
2005-04-26 16:07 ` Richard B. Johnson
2005-04-26 16:19 ` Grant Grundler
2005-04-26 17:12 ` Alan Stern
2005-04-26 17:19 ` Lee Revell [this message]
2005-04-25 20:08 ` Adam Belay
2005-04-25 20:19 ` Greg KH
2005-04-25 20:24 ` Adam Belay
2005-04-25 20:42 ` Pavel Machek
2005-04-25 20:55 ` Adam Belay
2005-04-25 21:06 ` Pavel Machek
2005-04-26 4:30 ` Benjamin Herrenschmidt
2005-04-26 16:12 ` Grant Grundler
2005-04-26 13:44 ` [linux-usb-devel] " David Brownell
2005-04-26 21:15 ` Pavel Machek
2005-04-25 21:00 ` Greg KH
2005-04-25 21:13 ` Pavel Machek
2005-04-26 3:41 ` Benjamin Herrenschmidt
2005-04-26 10:11 ` Pavel Machek
2005-04-25 21:13 ` [linux-usb-devel] " David Brownell
2005-04-26 3:39 ` Benjamin Herrenschmidt
2005-04-26 6:33 ` Adam Belay
2005-04-26 6:44 ` Greg KH
2005-05-04 7:02 [PATCH] PCI: fix up word-aligned 16-bit PCI config access through sysfs Greg KH
2005-05-04 7:02 ` [PATCH] PCI: Add pci shutdown ability Greg KH
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