Date: Fri, 12 Jun 2009 08:50:53 -0700
From: Jesse Barnes <jesse.barnes@intel.com>
To: Roland Dreier <rdreier@cisco.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>, Matthew Wilcox <matthew@wil.cx>,
       Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@elte.hu>,
       "general@lists.openfabrics.org" <general@lists.openfabrics.org>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: mthca double free irqs
Message-ID: <20090612085053.0fbe9731@jbarnes-g45>
In-Reply-To: <adafxe51pz9.fsf@cisco.com>
References: <86802c440906111945n2a42dc94mf08bd2b1a252842f@mail.gmail.com>
	<adafxe51pz9.fsf@cisco.com>
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On Fri, 12 Jun 2009 07:33:30 -0700
Roland Dreier <rdreier@cisco.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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