From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [net] i40e/i40evf: Update DESC_NEEDED value to reflect larger
 value
Date: Mon, 29 Jan 2018 14:22:28 -0500 (EST)
Message-ID: <20180129.142228.1419627183293212271.davem@davemloft.net>
References: <20180126165445.21743-1-jeffrey.t.kirsher@intel.com>
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Cc: alexander.h.duyck@intel.com, netdev@vger.kernel.org,
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To: jeffrey.t.kirsher@intel.com
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From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Fri, 26 Jan 2018 08:54:45 -0800

> From: Alexander Duyck <alexander.h.duyck@intel.com>
> 
> When compared to ixgbe and other previous Intel drivers the i40e and i40evf
> drivers actually reserve 2 additional descriptors in maybe_stop_tx for
> cache line alignment. We need to update DESC_NEEDED to reflect this as
> otherwise we are more likely to return TX_BUSY which will cause issues with
> things like xmit_more.
> 
> Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
> Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Applied, thanks.