From: Daniel Borkmann <dborkman@redhat.com>
Date: Tue, 26 Aug 2014 17:34:18 +0000 (+0200)
Subject: ixgbe: flush when in xmit_more mode and under descriptor pressure
X-Git-Tag: fixes-against-v3.18-rc2~81^2~207
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2367a17390138f68b3aa28f2f220b8d7ff8d91f4;p=pandora-kernel.git

ixgbe: flush when in xmit_more mode and under descriptor pressure

When xmit_more mode is being used and the ring is about to
become full or the stack has stopped the ring, enforce a tail
pointer write to the hw. Otherwise, we could risk a TX hang.

Code suggested by Alexander Duyck.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

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