netdev - Re: [net] ixgbe: DCB and SR-IOV can not co-exist and will cause hangs

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Message-Id: <20120709.001024.128106494285303449.davem@davemloft.net>
Date:	Mon, 09 Jul 2012 00:10:24 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jeffrey.t.kirsher@...el.com
Cc:	alexander.h.duyck@...el.com, netdev@...r.kernel.org,
	gospo@...hat.com, sassmann@...hat.com
Subject: Re: [net] ixgbe: DCB and SR-IOV can not co-exist and will cause
 hangs

From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Date: Wed,  4 Jul 2012 05:00:25 -0700

> From: Alexander Duyck <alexander.h.duyck@...el.com>
> 
> DCB and SR-IOV cannot currently be enabled at the same time as the queueing
> schemes are incompatible.  If they are both enabled it will result in Tx
> hangs since only the first Tx queue will be able to transmit any traffic.
> 
> This simple fix for this is to block us from enabling TCs in ixgbe_setup_tc
> if SR-IOV is enabled.  This change will be reverted once we can support
> SR-IOV and DCB coexistence.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@...el.com>
> Acked-by: John Fastabend <john.r.fastabend@...el.com>
> Tested-by: Phil Schmitt <phillip.j.schmitt@...el.com>
> Tested-by: Ross Brattain <ross.b.brattain@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>

Applied, thanks.
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