linux-kernel - Re: mthca double free irqs

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Message-ID: <20090612085053.0fbe9731@jbarnes-g45>
Date:	Fri, 12 Jun 2009 08:50:53 -0700
From:	Jesse Barnes <jesse.barnes@...el.com>
To:	Roland Dreier <rdreier@...co.com>
Cc:	Yinghai Lu <yhlu.kernel@...il.com>,
	Matthew Wilcox <matthew@....cx>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	"general@...ts.openfabrics.org" <general@...ts.openfabrics.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: mthca double free irqs

On Fri, 12 Jun 2009 07:33:30 -0700
Roland Dreier <rdreier@...co.com> wrote:

> By the way, can you try this with the ib_mthca module option
> "msi_x=0" -- because I see
> 
>  > [  606.538429] ib_mthca 0000:c4:00.0: NOP command failed to
>  > generate interrupt (IRQ 234).
>  > [  606.543348] ib_mthca 0000:c4:00.0: Trying again with MSI-X
>  > disabled.
> 
> But perhaps the fallback to non-MSI-X in the driver is messing things
> up.  Also you have:

My linux-next branch has a change to the return value from the MSI-X
allocation function: pci_enable_msix now returns the number of
available entries rather than -EINVAL if the allocation failed.  Would
that cause problems in the mthca driver?

-- 
Jesse Barnes, Intel Open Source Technology Center
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