Re: [Patch v10 01/12] net: mana: Add support for auxiliary device

From: Leon Romanovsky <leon@kernel.org>
To: Long Li <longli@microsoft.com>
Cc: KY Srinivasan <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Jason Gunthorpe <jgg@ziepe.ca>,
	"edumazet@google.com" <edumazet@google.com>,
	"shiraz.saleem@intel.com" <shiraz.saleem@intel.com>,
	Ajay Sharma <sharmaajay@microsoft.com>,
	"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-rdma@vger.kernel.org" <linux-rdma@vger.kernel.org>
Subject: Re: [Patch v10 01/12] net: mana: Add support for auxiliary device
Date: Wed, 9 Nov 2022 08:20:42 +0200	[thread overview]
Message-ID: <Y2tGukmMbtOq1CWy@unreal> (raw)
In-Reply-To: <PH7PR21MB3263700CCC9EC16FF7EA937BCE3F9@PH7PR21MB3263.namprd21.prod.outlook.com>

On Tue, Nov 08, 2022 at 09:33:21PM +0000, Long Li wrote:
> 
> > > int mana_probe(struct gdma_dev *gd, bool resuming)
> > >  				break;
> > >  		}
> > >  	}
> > > +
> > > +	err = add_adev(gd);
> > >  out:
> > >  	if (err)
> > >  		mana_remove(gd, false);
> > > @@ -2189,6 +2267,10 @@ void mana_remove(struct gdma_dev *gd, bool
> > suspending)
> > >  	int err;
> > >  	int i;
> > >
> > > +	/* adev currently doesn't support suspending, always remove it */
> > > +	if (gd->adev)
> > 
> > This condition is always true, isn't it?
> 
> I think the check is necessary. mana_probe() will call mana_remove() if it fails to
> add this adev to gd. If this is the case, we can't call remove_adev().

I'm sad to hear that. It is so anti-pattern to hide error unwind in one global function.
But ok, it is already there, so let's take this series as is.

Thanks

> 
> Thanks,
> Long