netdev - Re: [questions] why doesn't BCM5788 driver use MSI? What should I do to enable it?

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Message-ID: <C27F8246C663564A84BB7AB343977242163420403C@IRVEXCHCCR01.corp.ad.broadcom.com>
Date:	Wed, 21 Jan 2009 08:59:31 -0800
From:	"Michael Chan" <mchan@...adcom.com>
To:	"'Jike Song'" <albcamus@...il.com>
cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [questions] why doesn't BCM5788 driver use MSI? What should
 I do to enable it?

Jike Song wrote:

> Is there any method to get BCM5788 (tg3 driver) work with MSI enabled?
> lspci tells me MSI is supported by BCM5788 card:
>

The capability is there, but the hardware implementation is buggy.
The interrupt cannot be properly disabled, among other issues.  MSI
was fixed in later versions of the PCIE chips.

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