From 810b3ae42f5a6d1ddb17bb20eb69046de08ab1ef Mon Sep 17 00:00:00 2001
From: Anjali Singhai Jain <anjali.singhai@intel.com>
Date: Thu, 10 Jul 2014 07:58:25 +0000
Subject: [PATCH] i40e/i40evf: Ignore a driver perceived Tx hang if the number
 of desc pending < 4

We are seeing situations where the driver sees a hang with less than 4
desc pending, if the driver chooses to ignore it the queue progresses
forward and the stack never experiences a real hang.
With this patch we will log a stat when this situation happens
"tx_sluggish" will increment and we can see some more details
at a higher debug level. Other than that we will ignore this
particular case of Tx hang.

Change-ID: I7d1d1666d990e2b12f4f6bed0d17d22e1b6410d5
Signed-off-by: Anjali Singhai Jain <anjali.singhai@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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