From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH net-next] liquidio: fix hang when re-binding VF host drv after running DPDK VF driver Date: Mon, 16 Jul 2018 14:02:10 -0700 (PDT) Message-ID: <20180716.140210.2066723355300245370.davem@davemloft.net> References: <20180713195021.GA1178@felix-thinkpad.cavium.com> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, raghu.vatsavayi@cavium.com, derek.chickles@cavium.com, satananda.burla@cavium.com, ricardo.farrington@cavium.com To: felix.manlunas@cavium.com Return-path: Received: from shards.monkeyblade.net ([23.128.96.9]:60122 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728734AbeGPVbU (ORCPT ); Mon, 16 Jul 2018 17:31:20 -0400 In-Reply-To: <20180713195021.GA1178@felix-thinkpad.cavium.com> Sender: netdev-owner@vger.kernel.org List-ID: From: Felix Manlunas Date: Fri, 13 Jul 2018 12:50:21 -0700 > From: Rick Farrington > > When configuring SLI_PKTn_OUTPUT_CONTROL, VF driver was assuming that IPTR > mode was disabled by reset, which was not true. Since DPDK driver had > set IPTR mode previously, the VF driver (which uses buf-ptr-only mode) was > not properly handling DROQ packets (i.e. it saw zero-length packets). > > This represented an invalid hardware configuration which the driver could > not handle. > > Signed-off-by: Rick Farrington > Signed-off-by: Felix Manlunas Applied.