From: "David S. Miller" <davem@redhat.com>
To: alan@lxorguk.ukuu.org.uk
Cc: weber@nyc.rr.com, tom_gall@vnet.ibm.com, linux-kernel@vger.kernel.org
Subject: Re: 2.5.4, cs46xx snd, and virt_to_bus
Date: Mon, 11 Feb 2002 18:43:16 -0800 (PST) [thread overview]
Message-ID: <20020211.184316.70218682.davem@redhat.com> (raw)
In-Reply-To: <E16aKtw-0007Q0-00@the-village.bc.nu>
In-Reply-To: <3C680184.9090208@nyc.rr.com> <E16aKtw-0007Q0-00@the-village.bc.nu>
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
Date: Mon, 11 Feb 2002 18:10:04 +0000 (GMT)
For ISA devices pass NULL.
That is the recommended method for drivers that have to deal
with ISA and PCI variants of a chipset.
However, for "purely x86 ISA" devices one may use
isa_bus_to_virt and isa_virt_to_bus.
I hesitate to even mention this because what people should _not_ do is
just put "isa_" in front of the virt_to_bus et al. calls in all the
PCI drivers that stopped to link now.
There are other tangental issues I'd like to address and clarify in
this area. This includes the "what can be invoked from interrupt"
questions. Currently I think pci_{alloc,free}_consistent() should be
valid from an interrupt.
next prev parent reply other threads:[~2002-02-12 2:45 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fa.fefkfjv.rmid9f@ifi.uio.no>
2002-02-11 17:38 ` 2.5.4, cs46xx snd, and virt_to_bus John Weber
2002-02-11 18:10 ` Alan Cox
2002-02-12 2:43 ` David S. Miller [this message]
2002-02-12 14:51 ` Alan Cox
2002-02-12 14:49 ` benh
2002-02-12 14:50 ` benh
2002-02-14 6:36 ` Paul Gortmaker
2002-02-14 13:26 ` Alan Cox
2002-02-11 18:09 Tom Gall
2002-02-11 17:53 ` Alan Cox
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