From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thomas Monjalon <thomas.monjalon@6wind.com>
Subject: Re: rte_eth_tx_queue_setup() failing (error -22) when
	setting up tx queues on a VMXNET3 port...
Date: Wed, 25 Nov 2015 18:59:03 +0100
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To: "Montorsi, Francesco" <fmontorsi@empirix.com>
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2015-11-25 17:55, Montorsi, Francesco:
> Since I was using the rte_eth_rx_queue_count() function in one place, and VMXNET3 does not support it, I'm getting a SEGFAULT.
> So next question is:  is user's task to check for validity of pointers inside dev_ops before calling driver functions? Because rte_eth_rx_queue_count() and companion funcitons have no safety checks apparently (!!!)

Bruce already sent a fix for this issue.
It should be applied on HEAD in few minutes.