netdev - Re: [PATCH net] tg3: Fix single-vector MSI-X code

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Message-Id: <20120117.235640.1394063282901449922.davem@davemloft.net>
Date:	Tue, 17 Jan 2012 23:56:40 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	mcarlson@...adcom.com
Cc:	netdev@...r.kernel.org, mchan@...adcom.com
Subject: Re: [PATCH net] tg3: Fix single-vector MSI-X code

From: "Matt Carlson" <mcarlson@...adcom.com>
Date: Tue, 17 Jan 2012 17:27:23 -0800

> Kdump kernels leave MSI-X interrupts (as setup by the crashed kernel)
> enabled.  However, kdump only enables one CPU in the new environment,
> thus causing tg3 to abort MSI-X setup.  When the driver attempts to
> enable INTA or MSI interrupt modes on a kdump kernel, interrupt
> delivery fails.
> 
> This patch attempts to workaround the problem by forcing the driver
> to enable a single MSI-X interrupt.  In such a configuration, the
> device's multivector interrupt mode must be disabled.
> 
> Signed-off-by: Matt Carlson <mcarlson@...adcom.com>

Applied.
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