Re: [PATCH] igb_uio: remove device reset in open

[Gregory Etelson <gregory@weka.io>]

On Friday, 20 October 2017 19:57:38 IDT Ferruh Yigit wrote:
> 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
> 

sure.

> > ---
> > 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);