[PATCH] examples/ntb: remove redundant logic for dev close

[Guo, Junfeng]

> -----Original Message-----
> From: Thomas Monjalon <thomas at monjalon.net>
> Sent: Wednesday, June 28, 2023 08:12
> To: Wu, Jingjing <jingjing.wu at intel.com>; Guo, Junfeng
> <junfeng.guo at intel.com>
> Cc: dev at dpdk.org; stable at dpdk.org; He, Xingguang
> <xingguang.he at intel.com>; Laatz, Kevin <kevin.laatz at intel.com>;
> Richardson, Bruce <bruce.richardson at intel.com>
> Subject: Re: [PATCH] examples/ntb: remove redundant logic for dev close
> 
> 14/06/2023 07:14, Junfeng Guo:
> > During EAL cleanup stage, all bus devices are cleaned up properly.
> > Based on this, there is no need to do extra device close process,
> > which may call the dev ops '*dev->dev_ops->dev_close' twice.
> >
> > If this dev ops for ntb was called twice, the interrupt handle for
> > EAL will be disabled twice and will lead to error for the seconde
> > time. Like this: "EAL: Error disabling MSI-X interrupts for fd xx"
> 
> You should fix ntb to not disable interrupt twice.

Thanks for the comment!

Yes, it is exactly what this patch did.

The interrupt disabling process is part of 'dev_close' ops, and will be
called twice (one in EAL cleanup, another in ntb example cleanup).

Now that fixed & covered by the EAL cleanup, there is no need to
run dev_close at ntb example. Just remove that redundant logic.

Regards,
Junfeng

>