linux-kernel - Re: [PATCH 01/13] genirq/msi: Add cpumask allocation to alloc_msi

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Message-ID: <alpine.DEB.2.20.1609201058020.6905@nanos>
Date:   Tue, 20 Sep 2016 10:58:18 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Alexander Gordeev <agordeev@...hat.com>
cc:     Christoph Hellwig <hch@....de>, axboe@...com,
        keith.busch@...el.com, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 01/13] genirq/msi: Add cpumask allocation to
 alloc_msi_entry

On Tue, 20 Sep 2016, Alexander Gordeev wrote:
> On Mon, Sep 19, 2016 at 03:50:07PM +0200, Christoph Hellwig wrote:
> > On Mon, Sep 19, 2016 at 09:30:58AM +0200, Alexander Gordeev wrote:
> > > >  	INIT_LIST_HEAD(&desc->list);
> > > >  	desc->dev = dev;
> > > > +	desc->nvec_used = nvec;
> 
> (*)
> 
> > > > +	if (affinity) {
> > > > +		desc->affinity = kmemdup(affinity,
> > > > +			nvec * sizeof(*desc->affinity), GFP_KERNEL);
> > > > +		if (!desc->affinity) {
> > > > +			kfree(desc);
> > > > +			return NULL;
> > > > +		}
> > > > +	}
> > > 
> > > nit - should not "desc" initialization follow "desc->affinity" allocation?
> > 
> > I can't parse that sentence.  Do you mean the desc->nvec_used setup?
> 
> Yes, the inits above (*) would be useless if desc->affinity allocation failed.

And that matters how?

Thanks,

	tglx