[Intel-wired-lan] [PATCH v2] fm10k: use software values when checking for Tx hangs in hot path

[Singh, Krishneil K]

-----Original Message-----
From: Intel-wired-lan [mailto:intel-wired-lan-bounces at lists.osuosl.org] On Behalf Of Jacob Keller
Sent: Thursday, June 9, 2016 2:56 PM
To: Intel Wired LAN <intel-wired-lan at lists.osuosl.org>
Subject: [Intel-wired-lan] [PATCH v2] fm10k: use software values when checking for Tx hangs in hot path

A previous patch added support to check for hardware tx pending in the fm10k_down routine. This support was intended to ensure that we accurately check what the hardware state is. However, checking for Tx hangs in this manor during the hotpath results in a large performance hit. Avoid this by making the hotpath check use the SW counters instead.

Fixes: a0f53cf49cb0 ("fm10k: use actual hardware registers when checking for pending Tx", 2016-06-08)
Signed-off-by: Jacob Keller <jacob.e.keller at intel.com>
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Tested-by: Krishneil Singh <Krishneil.k.singh at intel.com>