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Daniel Vetter

2020-Apr-03 13:58 UTC

[PATCH 30/44] drm/qxl: Use devm_drm_dev_alloc

Also need to remove the drm_dev_put from the remove hook.

Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
Cc: Dave Airlie <airlied at redhat.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Cc: virtualization at lists.linux-foundation.org
Cc: spice-devel at lists.freedesktop.org
---
 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;
+	}
 
 	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;
 }
 
-- 
2.25.1

Gerd Hoffmann

2020-Apr-06 06:55 UTC

head link

[PATCH 30/44] drm/qxl: Use devm_drm_dev_alloc

On Fri, Apr 03, 2020 at 03:58:14PM +0200, Daniel Vetter
wrote:> Also need to remove the drm_dev_put from the remove hook.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Dave Airlie <airlied at redhat.com>
> Cc: Gerd Hoffmann <kraxel at redhat.com>
> Cc: virtualization at lists.linux-foundation.org
> Cc: spice-devel at lists.freedesktop.org
Acked-by: Gerd Hoffmann <kraxel at redhat.com>

Thomas Zimmermann

2020-Apr-06 12:11 UTC

head link

[PATCH 30/44] drm/qxl: Use devm_drm_dev_alloc

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 at intel.com>
> Cc: Dave Airlie <airlied at redhat.com>
> Cc: Gerd Hoffmann <kraxel at redhat.com>
> Cc: virtualization at lists.linux-foundation.org
> Cc: spice-devel at lists.freedesktop.org
> ---
>  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() ?

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 N?rnberg, Germany
(HRB 36809, AG N?rnberg)
Gesch?ftsf?hrer: Felix Imend?rffer

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Daniel Vetter

2020-Apr-07 07:19 UTC

head link

[PATCH 30/44] drm/qxl: Use devm_drm_dev_alloc

On Mon, Apr 6, 2020 at 7:29 PM Thomas Zimmermann <tzimmermann at suse.de>
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 at intel.com>
> > Cc: Dave Airlie <airlied at redhat.com>
> > Cc: Gerd Hoffmann <kraxel at redhat.com>
> > Cc: virtualization at lists.linux-foundation.org
> > Cc: spice-devel at lists.freedesktop.org
> > ---
> >  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 N?rnberg, Germany
> (HRB 36809, AG N?rnberg)
> Gesch?ftsf?hrer: Felix Imend?rffer
>

-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch

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