From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ferruh Yigit <ferruh.yigit@intel.com>
Subject: Re: [PATCH] igb_uio: remove device reset in open
Date: Fri, 20 Oct 2017 09:57:38 -0700
Message-ID: <44560a31-d8dc-b2e1-1589-95020fb654f3@intel.com>
References: <efabcaad-b0e9-e360-22b5-953b0bc20032@intel.com>
 <20171020165511.47899-1-ferruh.yigit@intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: 7bit
Cc: Thomas Monjalon <thomas@monjalon.net>, dev@dpdk.org, stable@dpdk.org,
 Jianfeng Tan <jianfeng.tan@intel.com>, George Prekas
 <george.prekas@epfl.ch>,
 Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
To: Jingjing Wu <jingjing.wu@intel.com>,
 Shijith Thotton <shijith.thotton@caviumnetworks.com>,
 Gregory Etelson <gregory@weka.io>, Harish Patil <harish.patil@cavium.com>
Return-path: <dev-bounces@dpdk.org>
In-Reply-To: <20171020165511.47899-1-ferruh.yigit@intel.com>
Content-Language: en-US
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <http://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <http://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

On 10/20/2017 9:55 AM, Ferruh Yigit wrote:
> Remove device reset during application start, the reset for application
> exit still there.
> 
> Reset in open removed because of following comments:
> 1- Device reset not completed when VF driver loaded, which cause VF PMD
>    initialization error.
>    Adding delay can solve the issue but will increase driver load time.
> 
> 2- Reset will be issues all devices unconditionally, not very efficient
>    way.
> 
> Fixes: b58eedfc7dd5 ("igb_uio: issue FLR during open and release of device file")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com>

Hi Jingjing, Shijith, Gregory, Harish,

Can you please test this on top of current master (which has already Jingjin's
fix) ?

Thanks,
ferruh

> ---
> Cc: Jianfeng Tan <jianfeng.tan@intel.com>
> Cc: Jingjing Wu <jingjing.wu@intel.com>
> Cc: Shijith Thotton <shijith.thotton@caviumnetworks.com>
> Cc: Gregory Etelson <gregory@weka.io>
> Cc: Harish Patil <harish.patil@cavium.com>
> Cc: George Prekas <george.prekas@epfl.ch>
> Cc: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
> ---
>  lib/librte_eal/linuxapp/igb_uio/igb_uio.c | 2 --
>  1 file changed, 2 deletions(-)
> 
> diff --git a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
> index f7ef82554..fd320d87d 100644
> --- a/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
> +++ b/lib/librte_eal/linuxapp/igb_uio/igb_uio.c
> @@ -336,8 +336,6 @@ igbuio_pci_open(struct uio_info *info, struct inode *inode)
>  	struct pci_dev *dev = udev->pdev;
>  	int err;
>  
> -	pci_reset_function(dev);
> -
>  	/* set bus master, which was cleared by the reset function */
>  	pci_set_master(dev);
>  
>