From: Christoph Hellwig <hch@lst.de>
To: Jake Moilanen <moilanen@austin.ibm.com>
Cc: linuxppc-dev@ozlabs.org, paulus@samba.org
Subject: Re: [PATCH 2/2] Base pSeries PCIe support
Date: Wed, 12 Apr 2006 06:05:03 +0200 [thread overview]
Message-ID: <20060412040503.GA7870@lst.de> (raw)
In-Reply-To: <20060331161330.3c723103.moilanen@austin.ibm.com>
On Fri, Mar 31, 2006 at 04:13:30PM -0600, Jake Moilanen wrote:
> This patch hooks our current interrupt subsystem and sets up a single
> vector MSI as if it was a LSI. Multiple MSI vectors is coming in the
> future.
This is broken. Linux drivers expect MSI to be disabled on ->probe.
There's at least two reasons for that:
(1) Many devices that claim to implement MSI are actually broken in
more or less subtile ways. and thus must use traditition INTx pins.
(2) MSI defines relaxed semantics for dma synchronization. Silently
enabling MSI could cause subtile data corruption.
next prev parent reply other threads:[~2006-04-12 4:05 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-03-31 22:02 [PATCH 0/2] Base pSeries PCIe support Jake Moilanen
2006-03-31 22:05 ` [PATCH 1/2] " Jake Moilanen
2006-03-31 22:15 ` Dave Hansen
2006-03-31 22:18 ` Jake Moilanen
2006-04-12 4:06 ` Christoph Hellwig
2006-03-31 22:13 ` [PATCH 2/2] " Jake Moilanen
2006-03-31 22:48 ` Olof Johansson
2006-03-31 23:08 ` Olof Johansson
2006-04-01 8:36 ` Paul Mackerras
2006-04-01 22:57 ` Jake Moilanen
2006-04-10 15:39 ` Jake Moilanen
2006-04-11 21:31 ` Benjamin Herrenschmidt
2006-04-01 8:38 ` Paul Mackerras
2006-04-12 4:05 ` Christoph Hellwig [this message]
2006-03-31 22:28 ` [PATCH 0/2] " Arnd Bergmann
2006-03-31 22:35 ` Jake Moilanen
2006-03-31 22:39 ` Doug Maxey
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