On Mon, Apr 6, 2020 at 7:29 PM Thomas Zimmermann <tzimmermann@xxxxxxx> wrote:
>
>
>
> Am 03.04.20 um 15:58 schrieb Daniel Vetter:
> > Also need to remove the drm_dev_put from the remove hook.
> >
> > Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> > Cc: Dave Airlie <airlied@xxxxxxxxxx>
> > Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
> > Cc: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
> > Cc: spice-devel@xxxxxxxxxxxxxxxxxxxxx
> > ---
> > drivers/gpu/drm/qxl/qxl_drv.c | 15 ++++++++-------
> > drivers/gpu/drm/qxl/qxl_drv.h | 3 +--
> > drivers/gpu/drm/qxl/qxl_kms.c | 12 +-----------
> > 3 files changed, 10 insertions(+), 20 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/qxl/qxl_drv.c b/drivers/gpu/drm/qxl/qxl_drv.c
> > index 09102e2efabc..6b4ae4c5fb76 100644
> > --- a/drivers/gpu/drm/qxl/qxl_drv.c
> > +++ b/drivers/gpu/drm/qxl/qxl_drv.c
> > @@ -81,13 +81,16 @@ qxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> > return -EINVAL; /* TODO: ENODEV ? */
> > }
> >
> > - qdev = kzalloc(sizeof(struct qxl_device), GFP_KERNEL);
> > - if (!qdev)
> > + qdev = devm_drm_dev_alloc(&pdev->dev, &qxl_driver,
> > + struct qxl_device, ddev);
> > + if (IS_ERR(qdev)) {
> > + pr_err("Unable to init drm dev");
> > return -ENOMEM;
> > + }
>
> My feeling is that it is too early to allocate. Wouldn't it be better to
> first do the pdev and conflicting-fb stuff and allocate right before
> qxl_device_init() ?
It doesn't matter. I can reorder, or I can also not reorder, it'll
have 0 effects on cleanup (all done automatically) or correctness
(it's just a memory allocation, it doesn't do anything).
-Daniel
> Best regards
> Thomas
>
> >
> > ret = pci_enable_device(pdev);
> > if (ret)
> > - goto free_dev;
> > + return ret;
> >
> > ret = drm_fb_helper_remove_conflicting_pci_framebuffers(pdev, "qxl");
> > if (ret)
> > @@ -101,7 +104,7 @@ qxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> > }
> > }
> >
> > - ret = qxl_device_init(qdev, &qxl_driver, pdev);
> > + ret = qxl_device_init(qdev, pdev);
> > if (ret)
> > goto put_vga;
> >
> > @@ -128,8 +131,7 @@ qxl_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
> > vga_put(pdev, VGA_RSRC_LEGACY_IO);
> > disable_pci:
> > pci_disable_device(pdev);
> > -free_dev:
> > - kfree(qdev);
> > +
> > return ret;
> > }
> >
> > @@ -155,7 +157,6 @@ qxl_pci_remove(struct pci_dev *pdev)
> > drm_atomic_helper_shutdown(dev);
> > if (is_vga(pdev))
> > vga_put(pdev, VGA_RSRC_LEGACY_IO);
> > - drm_dev_put(dev);
> > }
> >
> > DEFINE_DRM_GEM_FOPS(qxl_fops);
> > diff --git a/drivers/gpu/drm/qxl/qxl_drv.h b/drivers/gpu/drm/qxl/qxl_drv.h
> > index 435126facc9b..86ac191d9205 100644
> > --- a/drivers/gpu/drm/qxl/qxl_drv.h
> > +++ b/drivers/gpu/drm/qxl/qxl_drv.h
> > @@ -276,8 +276,7 @@ struct qxl_device {
> > extern const struct drm_ioctl_desc qxl_ioctls[];
> > extern int qxl_max_ioctl;
> >
> > -int qxl_device_init(struct qxl_device *qdev, struct drm_driver *drv,
> > - struct pci_dev *pdev);
> > +int qxl_device_init(struct qxl_device *qdev, struct pci_dev *pdev);
> > void qxl_device_fini(struct qxl_device *qdev);
> >
> > int qxl_modeset_init(struct qxl_device *qdev);
> > diff --git a/drivers/gpu/drm/qxl/qxl_kms.c b/drivers/gpu/drm/qxl/qxl_kms.c
> > index 9eed1a375f24..91a34dd835d7 100644
> > --- a/drivers/gpu/drm/qxl/qxl_kms.c
> > +++ b/drivers/gpu/drm/qxl/qxl_kms.c
> > @@ -108,21 +108,13 @@ static void qxl_gc_work(struct work_struct *work)
> > }
> >
> > int qxl_device_init(struct qxl_device *qdev,
> > - struct drm_driver *drv,
> > struct pci_dev *pdev)
> > {
> > int r, sb;
> >
> > - r = drm_dev_init(&qdev->ddev, drv, &pdev->dev);
> > - if (r) {
> > - pr_err("Unable to init drm dev");
> > - goto error;
> > - }
> > -
> > qdev->ddev.pdev = pdev;
> > pci_set_drvdata(pdev, &qdev->ddev);
> > qdev->ddev.dev_private = qdev;
> > - drmm_add_final_kfree(&qdev->ddev, qdev);
> >
> > mutex_init(&qdev->gem.mutex);
> > mutex_init(&qdev->update_area_mutex);
> > @@ -138,8 +130,7 @@ int qxl_device_init(struct qxl_device *qdev,
> > qdev->vram_mapping = io_mapping_create_wc(qdev->vram_base, pci_resource_len(pdev, 0));
> > if (!qdev->vram_mapping) {
> > pr_err("Unable to create vram_mapping");
> > - r = -ENOMEM;
> > - goto error;
> > + return -ENOMEM;
> > }
> >
> > if (pci_resource_len(pdev, 4) > 0) {
> > @@ -293,7 +284,6 @@ int qxl_device_init(struct qxl_device *qdev,
> > io_mapping_free(qdev->surface_mapping);
> > vram_mapping_free:
> > io_mapping_free(qdev->vram_mapping);
> > -error:
> > return r;
> > }
> >
> >
>
> --
> Thomas Zimmermann
> Graphics Driver Developer
> SUSE Software Solutions Germany GmbH
> Maxfeldstr. 5, 90409 Nürnberg, Germany
> (HRB 36809, AG Nürnberg)
> Geschäftsführer: Felix Imendörffer
>
--
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch
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