From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "David S. Miller" <davem@redhat.com>
Cc: Linus Torvalds <torvalds@osdl.org>, Greg KH <greg@kroah.com>,
Andrew Morton <akpm@osdl.org>,
Linux-USB <linux-usb-devel@lists.sourceforge.net>,
Linux Kernel list <linux-kernel@vger.kernel.org>
Subject: Re: [BK PATCH] USB update for 2.6.3
Date: Fri, 20 Feb 2004 18:10:41 +1100 [thread overview]
Message-ID: <1077261041.20787.1181.camel@gaston> (raw)
In-Reply-To: <20040219230407.063ef209.davem@redhat.com>
> You miss how all of this stuff is being used :-)
>
> USB drivers do things like map DMA memory, and the generic DMA layer vectors it
> so that if the USB device is attached to a PCI host the PCI DMA mapping routines
> get used.
Hrm... so if the USB device drivers are actually doing the dma mapping
themselves, it make sense for them to pass their own struct device, no ?
Or do they have always to pass their host controller one ?
In the former case, we need that inheritance stuff. In the later case
we don't. At this point, it's pretty much a matter of policy.
Ben.
next prev parent reply other threads:[~2004-02-20 7:15 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-02-20 1:28 Greg KH
2004-02-20 5:58 ` Linus Torvalds
2004-02-20 6:03 ` Benjamin Herrenschmidt
2004-02-20 6:30 ` Linus Torvalds
2004-02-20 6:28 ` Benjamin Herrenschmidt
2004-02-20 6:47 ` Linus Torvalds
2004-02-20 6:42 ` Benjamin Herrenschmidt
2004-02-20 7:00 ` Greg KH
2004-02-20 7:06 ` Benjamin Herrenschmidt
2004-02-20 7:58 ` [linux-usb-devel] " David Brownell
2004-02-20 7:03 ` Linus Torvalds
2004-02-20 7:04 ` David S. Miller
2004-02-20 7:10 ` Benjamin Herrenschmidt [this message]
2004-02-20 7:32 ` David S. Miller
2004-02-20 15:15 ` Linus Torvalds
2004-02-20 18:15 ` Hollis Blanchard
2004-02-20 18:39 ` Linus Torvalds
2004-02-20 19:20 ` Hollis Blanchard
2004-02-20 19:32 ` Linus Torvalds
2004-02-20 22:40 ` [linux-usb-devel] " Benjamin Herrenschmidt
2004-02-20 19:30 ` Alan Stern
2004-02-20 7:08 ` Benjamin Herrenschmidt
2004-02-20 8:08 ` David Brownell
2004-02-20 9:26 ` Russell King
2004-02-20 7:40 ` Deepak Saxena
2004-02-20 7:47 ` [linux-usb-devel] " Benjamin Herrenschmidt
2004-02-20 8:08 ` Deepak Saxena
2004-02-20 8:43 ` David Brownell
2004-02-20 8:48 ` Benjamin Herrenschmidt
2004-02-20 9:27 ` Russell King
[not found] <fa.d7mjamc.1l40pri@ifi.uio.no>
2004-02-20 6:34 ` Andy Lutomirski
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