linux-kernel - Re: [PATCH 5/7] vfio/platform: Disable virqfds on cleanup

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Message-ID: <20240308110937.2f2d934e.alex.williamson@redhat.com>
Date: Fri, 8 Mar 2024 11:09:37 -0700
From: Alex Williamson <alex.williamson@...hat.com>
To: "Tian, Kevin" <kevin.tian@...el.com>
Cc: "kvm@...r.kernel.org" <kvm@...r.kernel.org>, "eric.auger@...hat.com"
 <eric.auger@...hat.com>, "clg@...hat.com" <clg@...hat.com>, "Chatre,
 Reinette" <reinette.chatre@...el.com>, "linux-kernel@...r.kernel.org"
 <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 5/7] vfio/platform: Disable virqfds on cleanup

On Fri, 8 Mar 2024 07:16:02 +0000
"Tian, Kevin" <kevin.tian@...el.com> wrote:

> > From: Alex Williamson <alex.williamson@...hat.com>
> > Sent: Thursday, March 7, 2024 5:15 AM
> > 
> > @@ -321,8 +321,13 @@ void vfio_platform_irq_cleanup(struct
> > vfio_platform_device *vdev)
> >  {
> >  	int i;
> > 
> > -	for (i = 0; i < vdev->num_irqs; i++)
> > +	for (i = 0; i < vdev->num_irqs; i++) {
> > +		int hwirq = vdev->get_irq(vdev, i);  
> 
> hwirq is unused.

Yep, poor split with the next patch.  I'll update the next patch to use
vdev->irqs[i].hwirq here and in the unwind on init to avoid this.  Thanks,

Alex

> > +
> > +		vfio_virqfd_disable(&vdev->irqs[i].mask);
> > +		vfio_virqfd_disable(&vdev->irqs[i].unmask);
> >  		vfio_set_trigger(vdev, i, -1, NULL);
> > +	}
> > 
> >  	vdev->num_irqs = 0;
> >  	kfree(vdev->irqs);
> > --
> > 2.43.2  
>