[PATCH 05/59] drm/vboxvidoe: use managed pci functions

[Daniel Vetter]

On Wed, Apr 15, 2020 at 05:03:55PM +0200, Hans de Goede wrote:
> Hi,
> 
> On 4/15/20 9:39 AM, Daniel Vetter wrote:
> > Allows us to drop the cleanup code on the floor.
> > 
> > Sam noticed in his review:
> > > With this change we avoid calling pci_disable_device()
> > > twise in case vbox_mm_init() fails.
> > > Once in vbox_hw_fini() and once in the error path.
> > 
> > v2: Include Sam's review remarks
> > 
> > Acked-by: Sam Ravnborg <sam at ravnborg.org>
> > Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> > Cc: Hans de Goede <hdegoede at redhat.com>
> > ---
> >   drivers/gpu/drm/vboxvideo/vbox_drv.c  | 6 ++----
> >   drivers/gpu/drm/vboxvideo/vbox_main.c | 7 +------
> >   2 files changed, 3 insertions(+), 10 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/vboxvideo/vbox_drv.c b/drivers/gpu/drm/vboxvideo/vbox_drv.c
> > index cfa4639c5142..cf2e3e6a2388 100644
> > --- a/drivers/gpu/drm/vboxvideo/vbox_drv.c
> > +++ b/drivers/gpu/drm/vboxvideo/vbox_drv.c
> > @@ -55,13 +55,13 @@ static int vbox_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> >   	pci_set_drvdata(pdev, vbox);
> >   	mutex_init(&vbox->hw_mutex);
> > -	ret = pci_enable_device(pdev);
> > +	ret = pcim_enable_device(pdev);
> >   	if (ret)
> >   		return ret;
> >   	ret = vbox_hw_init(vbox);
> >   	if (ret)
> > -		goto err_pci_disable;
> > +		return ret;
> >   	ret = vbox_mm_init(vbox);
> >   	if (ret)
> > @@ -91,8 +91,6 @@ static int vbox_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> >   	vbox_mm_fini(vbox);
> >   err_hw_fini:
> >   	vbox_hw_fini(vbox);
> > -err_pci_disable:
> > -	pci_disable_device(pdev);
> >   	return ret;
> >   }
> > diff --git a/drivers/gpu/drm/vboxvideo/vbox_main.c b/drivers/gpu/drm/vboxvideo/vbox_main.c
> > index 9dcab115a261..1336ab9795fc 100644
> > --- a/drivers/gpu/drm/vboxvideo/vbox_main.c
> > +++ b/drivers/gpu/drm/vboxvideo/vbox_main.c
> > @@ -71,8 +71,6 @@ static void vbox_accel_fini(struct vbox_private *vbox)
> >   	for (i = 0; i < vbox->num_crtcs; ++i)
> >   		vbva_disable(&vbox->vbva_info[i], vbox->guest_pool, i);
> > -
> > -	pci_iounmap(vbox->ddev.pdev, vbox->vbva_buffers);
> >   }
> >   /* Do we support the 4.3 plus mode hint reporting interface? */
> 
> This seems to be missing the conversion of the iomap_range call to
> the devm equivalent ?   :
> 
> drivers/gpu/drm/vboxvideo/vbox_main.c
> 44:     vbox->vbva_buffers = pci_iomap_range(vbox->ddev.pdev, 0, ...

pcim_enable_device is pure magic, it converts _all_ pci_ calls on that
device to the managed version. There's no other manged pci_ functions (ok
1-2 more, but they're rather special).
-Daniel

> 
> Regards,
> 
> Hans
> 
> 
> 
> 
> 
> > @@ -125,7 +123,7 @@ int vbox_hw_init(struct vbox_private *vbox)
> >   	/* Create guest-heap mem-pool use 2^4 = 16 byte chunks */
> >   	vbox->guest_pool = gen_pool_create(4, -1);
> >   	if (!vbox->guest_pool)
> > -		goto err_unmap_guest_heap;
> > +		return -ENOMEM;
> >   	ret = gen_pool_add_virt(vbox->guest_pool,
> >   				(unsigned long)vbox->guest_heap,
> > @@ -168,8 +166,6 @@ int vbox_hw_init(struct vbox_private *vbox)
> >   err_destroy_guest_pool:
> >   	gen_pool_destroy(vbox->guest_pool);
> > -err_unmap_guest_heap:
> > -	pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
> >   	return ret;
> >   }
> > @@ -177,5 +173,4 @@ void vbox_hw_fini(struct vbox_private *vbox)
> >   {
> >   	vbox_accel_fini(vbox);
> >   	gen_pool_destroy(vbox->guest_pool);
> > -	pci_iounmap(vbox->ddev.pdev, vbox->guest_heap);
> >   }
> > 
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch