Re: [dpdk-dev] [dpdk-stable] [PATCH 1/2] bus/pci: fix driver detach clear

[Matan Azrad <matan@mellanox.com>]

Hi

From: Thomas Monjalon
> 12/11/2019 09:47, Matan Azrad:
> > When a rte_device is unplugged, the driver should be detached from the
> > device.
> 
> Yes
> 
> > The PCI detach driver operation wrongly didn't clear the driver from
> > the device structure what remain the device in probe state from the
> > EAL point of view.
> 
> Are you aware of an use case which is broken because of that?

Yes, will add  a small example.

> 
> > --- a/drivers/bus/pci/pci_common.c
> > +++ b/drivers/bus/pci/pci_common.c
> > @@ -247,6 +247,7 @@ static struct rte_devargs
> > *pci_devargs_lookup(struct rte_pci_device *dev)
> 
> The git context above is wrong, it should show the function
> rte_pci_detach_dev.
> 
> >  	/* clear driver structure */
> >  	dev->driver = NULL;
> > +	dev->device.driver = NULL;
> 
> It looks a good fix.
> Acked-by: Thomas Monjalon <thomas@monjalon.net>
> 
> I am wondering if there could be a risk for any test application if applied in
> 19.11-rc3.
> I think we should try to get it and revert if a side effect is discovered.
>