From: Roland Dreier <rdreier@cisco.com>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Jeff Garzik <jeff@garzik.org>, David Miller <davem@davemloft.net>,
linux-kernel@vger.kernel.org, tiwai@suse.de
Subject: Re: [PATCH] ALSA: hda-intel - Disable MSI support by default
Date: Wed, 15 Nov 2006 10:45:38 -0800 [thread overview]
Message-ID: <adad57oy2el.fsf@cisco.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0611150739110.3349@woody.osdl.org> (Linus Torvalds's message of "Wed, 15 Nov 2006 07:53:27 -0800 (PST)")
> > Huh? The device can't generate any legacy interrupts once MSI is
> > enabled. As the PCI spec says:
>
> PLEASE.
>
> The spec is just so much toilet paper. The ONLY thing that matters is what
> real hardware does. So please please please PLEASE don't start quoting
> specs as a way to "prove your point". It is totally meaningless.
Sorry, I think you misunderstood. I've certainly seen my share of
crazy devices doing things like endian-reversing the MSI address and
sending interrupt messages off into random space. The only thing I
was disagreeing with was that Jeff suggested it was a driver bug not
to do pci_intx(0) when enabling MSI.
I don't doubt that there are broken devices out there that do generate
wire interrupts even when MSI is enabled. I just don't think we
should go around "fixing" working, correct drivers for devices that
_do_ follow the spec.
- R.
next prev parent reply other threads:[~2006-11-15 18:45 UTC|newest]
Thread overview: 101+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200611150059.kAF0xBTl009796@hera.kernel.org>
2006-11-15 1:34 ` [PATCH] ALSA: hda-intel - Disable MSI support by default Jeff Garzik
2006-11-15 1:55 ` Linus Torvalds
2006-11-15 2:40 ` Jeff Garzik
2006-11-15 2:49 ` Linus Torvalds
2006-11-15 3:00 ` David Miller
2006-11-15 3:10 ` Linus Torvalds
2006-11-15 3:21 ` David Miller
2006-11-15 3:54 ` Linus Torvalds
2006-11-15 4:11 ` Jeff Garzik
2006-11-15 4:15 ` David Miller
2006-11-15 4:24 ` Jeff Garzik
2006-11-15 4:28 ` David Miller
2006-11-16 2:25 ` Benjamin Herrenschmidt
2006-11-16 2:28 ` Benjamin Herrenschmidt
2006-11-16 3:25 ` Jeff Garzik
2006-11-16 4:12 ` Benjamin Herrenschmidt
2006-11-16 6:13 ` Jeff Garzik
2006-11-16 14:41 ` Krzysztof Halasa
2006-11-16 15:27 ` Jeff Garzik
2006-11-16 17:24 ` Roland Dreier
2006-11-15 19:09 ` Stephen Hemminger
2006-11-15 19:23 ` Jeff Garzik
2006-11-15 19:49 ` Stephen Hemminger
2006-11-15 22:31 ` Roland Dreier
2006-11-16 2:24 ` Benjamin Herrenschmidt
2006-11-15 4:30 ` Roland Dreier
2006-11-15 4:56 ` Jeff Garzik
2006-11-15 15:53 ` Linus Torvalds
2006-11-15 18:30 ` Jeff Garzik
2006-11-15 18:45 ` Roland Dreier [this message]
2006-11-16 2:29 ` Benjamin Herrenschmidt
2006-11-15 13:34 ` Krzysztof Halasa
2006-11-15 18:42 ` Jeff Garzik
2006-11-15 19:04 ` Linus Torvalds
2006-11-15 19:20 ` Jeff Garzik
2006-11-15 19:35 ` Linus Torvalds
2006-11-15 19:59 ` Mws
2006-11-15 20:14 ` Linus Torvalds
2006-11-15 20:53 ` Olivier Nicolas
2006-11-16 6:08 ` Yinghai Lu
2006-11-16 23:25 ` Olivier Nicolas
2006-11-15 21:10 ` Mws
2006-11-16 11:10 ` Mws
2006-11-15 4:14 ` Roland Dreier
2006-11-15 4:49 ` Andi Kleen
2006-11-15 4:57 ` Roland Dreier
2006-11-15 5:11 ` Andi Kleen
2006-11-15 22:43 ` Roland Dreier
2006-11-15 18:35 ` [PATCH] ACPI: use MSI_NOT_SUPPORTED bit Randy Dunlap
2006-11-15 18:44 ` Andi Kleen
2006-11-15 19:41 ` [PATCH v2] " Randy Dunlap
2006-11-15 19:58 ` [PATCH v3] " Randy Dunlap
2006-11-15 20:19 ` [PATCH] " Len Brown
2006-11-16 2:22 ` [PATCH] ALSA: hda-intel - Disable MSI support by default Benjamin Herrenschmidt
2006-11-15 10:31 ` Takashi Iwai
2006-11-15 16:19 ` Linus Torvalds
2006-11-15 16:24 ` Arjan van de Ven
2006-11-15 16:36 ` Linus Torvalds
2006-11-15 18:40 ` Jeff Garzik
2006-11-15 18:51 ` Linus Torvalds
2006-11-15 19:01 ` Arjan van de Ven
2006-11-15 19:34 ` Stephen Clark
2006-11-15 19:48 ` Jeff Garzik
2006-11-15 20:01 ` Stephen Clark
2006-11-15 18:32 ` Jeff Garzik
2006-11-15 18:32 ` Jeff Garzik
2006-11-15 18:58 ` Takashi Iwai
2006-11-15 19:15 ` Jeff Garzik
2006-11-16 10:44 ` Takashi Iwai
2006-11-16 23:01 ` Olivier Nicolas
2006-11-17 10:55 ` Takashi Iwai
2006-11-17 16:17 ` Yinghai Lu
2006-11-17 16:35 ` Linus Torvalds
2006-11-15 19:20 ` Stephen Hemminger
2006-11-15 22:35 ` Roland Dreier
2006-11-15 4:01 ` Benjamin Herrenschmidt
2006-11-15 4:07 ` David Miller
2006-11-15 7:23 ` Benjamin Herrenschmidt
2006-11-15 10:06 ` Segher Boessenkool
2006-11-15 4:23 ` Roland Dreier
2006-11-15 7:24 ` Benjamin Herrenschmidt
2006-11-15 4:04 ` Benjamin Herrenschmidt
2006-11-15 4:14 ` Jeff Garzik
2006-11-15 4:24 ` Roland Dreier
2006-11-15 2:58 ` Randy Dunlap
2006-11-15 3:10 ` D. Hazelton
2006-11-15 3:30 ` Jeff Garzik
2006-11-15 3:53 ` D. Hazelton
2006-11-15 11:40 ` Alan
2006-11-16 4:06 ` D. Hazelton
2006-11-16 0:17 Lu, Yinghai
-- strict thread matches above, loose matches on Subject: below --
2006-11-16 3:50 Lu, Yinghai
2006-11-16 23:36 ` Olivier Nicolas
2006-11-16 4:24 linux
2006-11-16 10:53 ` Alan
2006-11-16 16:05 ` Linus Torvalds
2006-11-16 4:25 Lu, Yinghai
2006-11-16 18:00 ` D. Hazelton
2006-11-16 23:54 Lu, Yinghai
2006-11-17 0:49 ` Olivier Nicolas
2006-11-17 17:42 Lu, Yinghai
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