From: Matthew Wilcox <matthew@wil.cx>
To: Andrew Vasquez <andrew.vasquez@qlogic.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>,
scsi <linux-scsi@vger.kernel.org>, gregkh <greg@kroah.com>,
David Somayajulu <david.somayajulu@qlogic.com>,
linuxppc-dev@ozlabs.org, linux-driver@qlogic.com,
PCI <linux-pci@atrey.karlin.mff.cuni.cz>
Subject: Re: qla_wxyz pci_set_mwi question
Date: Thu, 12 Apr 2007 14:04:38 -0600 [thread overview]
Message-ID: <20070412200438.GM26692@parisc-linux.org> (raw)
In-Reply-To: <20070412193713.GB14510@andrew-vasquezs-computer.local>
On Thu, Apr 12, 2007 at 12:37:13PM -0700, Andrew Vasquez wrote:
> On Thu, 12 Apr 2007, Matthew Wilcox wrote:
> > Why should it fail? If there's a platform which can't support a
> > cacheline size that the qla2xyz card can handle, it should be able to
> > happily fall back to doing plain writes instead of MWIs. IMO, it should
> > just call pci_set_mwi() and ignore the result.
>
> I believe there were some erratas on some ISP2xxx chips where MWI
> needed to be set for proper operation. I'll go back, verify and
> update the patch accordingly.
Hmm. The thing is that pci_set_mwi() returns success on machines where
MWI is disabled (currently only PPC64). Perhaps it needs to fail
instead.
next parent reply other threads:[~2007-04-12 20:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20070411221507.69c97257.randy.dunlap@oracle.com>
[not found] ` <20070412172038.GG10124@andrew-vasquezs-computer.local>
[not found] ` <20070412185347.GL26692@parisc-linux.org>
[not found] ` <20070412193713.GB14510@andrew-vasquezs-computer.local>
2007-04-12 20:04 ` Matthew Wilcox [this message]
2007-04-13 2:34 ` qla_wxyz pci_set_mwi question Benjamin Herrenschmidt
2007-04-13 2:40 ` Randy Dunlap
2007-04-13 2:43 ` Benjamin Herrenschmidt
2007-05-03 17:44 ` Andrew Vasquez
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