From 2e0103810c6fed6a736c4a3af87b0f5c6bd8cd5b Mon Sep 17 00:00:00 2001
From: Emil Tantilov <emil.s.tantilov@intel.com>
Date: Tue, 22 Oct 2013 08:21:04 +0000
Subject: [PATCH] ixgbe: fix rx-usecs range checks for BQL

This patch resolves an issue where the logic used to detect changes in rx-usecs
was incorrect and was masked by the call to ixgbe_update_rsc().

Setting rx-usecs between 0,2-9 and 1,10 and up requires a reset to allow
ixgbe_configure_tx_ring() to set the correct value for TXDCTL.WTHRESH in
order to avoid Tx hangs with BQL enabled.

Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com>
Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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