drm/gem: simplify object initialization

drm_gem_object_init() and drm_gem_private_object_init() do exactly the
same (except for shmem alloc) so make the first use the latter to reduce
code duplication.

Also drop the return code from drm_gem_private_object_init(). It seems
unlikely that we will extend it any time soon so no reason to keep it
around. This simplifies code paths in drivers, too.

Last but not least, fix gma500 to call drm_gem_object_release() before
freeing objects that were allocated via drm_gem_private_object_init().
That isn't actually necessary for now, but might be in the future.

Change-Id: I8c23aa0239061192c4c8b69f76c7ec125b7a8705
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>

diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c
index ec14339..e24136c 100644 (file)
--- a/drivers/gpu/drm/drm_gem.c
+++ b/drivers/gpu/drm/drm_gem.c
@@ -136,16 +136,14 @@ drm_gem_destroy(struct drm_device *dev)
 int drm_gem_object_init(struct drm_device *dev,
                        struct drm_gem_object *obj, size_t size)
 {
-       BUG_ON((size & (PAGE_SIZE - 1)) != 0);
+       struct file *filp;
 
-       obj->dev = dev;
-       obj->filp = shmem_file_setup("drm mm object", size, VM_NORESERVE);
-       if (IS_ERR(obj->filp))
-               return PTR_ERR(obj->filp);
+       filp = shmem_file_setup("drm mm object", size, VM_NORESERVE);
+       if (IS_ERR(filp))
+               return PTR_ERR(filp);
 
-       kref_init(&obj->refcount);
-       atomic_set(&obj->handle_count, 0);
-       obj->size = size;
+       drm_gem_private_object_init(dev, obj, size);
+       obj->filp = filp;
 
        return 0;
 }
@@ -156,8 +154,8 @@ EXPORT_SYMBOL(drm_gem_object_init);
  * no GEM provided backing store. Instead the caller is responsible for
  * backing the object and handling it.
  */
-int drm_gem_private_object_init(struct drm_device *dev,
-                       struct drm_gem_object *obj, size_t size)
+void drm_gem_private_object_init(struct drm_device *dev,
+                                struct drm_gem_object *obj, size_t size)
 {
        BUG_ON((size & (PAGE_SIZE - 1)) != 0);
 
@@ -167,8 +165,6 @@ int drm_gem_private_object_init(struct drm_device *dev,
        kref_init(&obj->refcount);
        atomic_set(&obj->handle_count, 0);
        obj->size = size;
-
-       return 0;
 }
 EXPORT_SYMBOL(drm_gem_private_object_init);
 

diff --git a/drivers/gpu/drm/gma500/framebuffer.c b/drivers/gpu/drm/gma500/framebuffer.c
index 8b1b6d9..362dd2a 100644 (file)
--- a/drivers/gpu/drm/gma500/framebuffer.c
+++ b/drivers/gpu/drm/gma500/framebuffer.c
@@ -321,10 +321,8 @@ static struct gtt_range *psbfb_alloc(struct drm_device *dev, int aligned_size)
        /* Begin by trying to use stolen memory backing */
        backing = psb_gtt_alloc_range(dev, aligned_size, "fb", 1);
        if (backing) {
-               if (drm_gem_private_object_init(dev,
-                                       &backing->gem, aligned_size) == 0)
-                       return backing;
-               psb_gtt_free_range(dev, backing);
+               drm_gem_private_object_init(dev, &backing->gem, aligned_size);
+               return backing;
        }
        return NULL;
 }

diff --git a/drivers/gpu/drm/gma500/gem.c b/drivers/gpu/drm/gma500/gem.c
index eefd6cc..fe1d332 100644 (file)
--- a/drivers/gpu/drm/gma500/gem.c
+++ b/drivers/gpu/drm/gma500/gem.c
@@ -261,11 +261,12 @@ static int psb_gem_create_stolen(struct drm_file *file, struct drm_device *dev,
        struct gtt_range *gtt = psb_gtt_alloc_range(dev, size, "gem", 1);
        if (gtt == NULL)
                return -ENOMEM;
-       if (drm_gem_private_object_init(dev, &gtt->gem, size) != 0)
-               goto free_gtt;
+
+       drm_gem_private_object_init(dev, &gtt->gem, size);
        if (drm_gem_handle_create(file, &gtt->gem, handle) == 0)
                return 0;
-free_gtt:
+
+       drm_gem_object_release(&gtt->gem);
        psb_gtt_free_range(dev, gtt);
        return -ENOMEM;
 }

diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
index dc53a52..f2e185c 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c
+++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c
@@ -289,12 +289,7 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
                goto fail_detach;
        }
 
-       ret = drm_gem_private_object_init(dev, &obj->base, dma_buf->size);
-       if (ret) {
-               i915_gem_object_free(obj);
-               goto fail_detach;
-       }
-
+       drm_gem_private_object_init(dev, &obj->base, dma_buf->size);
        i915_gem_object_init(obj, &i915_gem_object_dmabuf_ops);
        obj->base.import_attach = attach;
 

diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c b/drivers/gpu/drm/i915/i915_gem_stolen.c
index fa2d15b..da6090b 100644 (file)
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -259,9 +259,7 @@ _i915_gem_object_create_stolen(struct drm_device *dev,
        if (obj == NULL)
                return NULL;
 
-       if (drm_gem_private_object_init(dev, &obj->base, stolen->size))
-               goto cleanup;
-
+       drm_gem_private_object_init(dev, &obj->base, stolen->size);
        i915_gem_object_init(obj, &i915_gem_object_stolen_ops);
 
        obj->pages = i915_pages_create_for_stolen(dev,

diff --git a/drivers/gpu/drm/omapdrm/omap_gem.c b/drivers/gpu/drm/omapdrm/omap_gem.c
index 2272c66..081d3e8 100644 (file)
--- a/drivers/gpu/drm/omapdrm/omap_gem.c
+++ b/drivers/gpu/drm/omapdrm/omap_gem.c
@@ -1427,8 +1427,9 @@ struct drm_gem_object *omap_gem_new(struct drm_device *dev,
                omap_obj->height = gsize.tiled.height;
        }
 
+       ret = 0;
        if (flags & (OMAP_BO_DMA|OMAP_BO_EXT_MEM))
-               ret = drm_gem_private_object_init(dev, obj, size);
+               drm_gem_private_object_init(dev, obj, size);
        else
                ret = drm_gem_object_init(dev, obj, size);
 

diff --git a/include/drm/drmP.h b/include/drm/drmP.h
index 4bac19d..ce6a6d8 100644 (file)
--- a/include/drm/drmP.h
+++ b/include/drm/drmP.h
@@ -1656,8 +1656,8 @@ struct drm_gem_object *drm_gem_object_alloc(struct drm_device *dev,
                                            size_t size);
 int drm_gem_object_init(struct drm_device *dev,
                        struct drm_gem_object *obj, size_t size);
-int drm_gem_private_object_init(struct drm_device *dev,
-                       struct drm_gem_object *obj, size_t size);
+void drm_gem_private_object_init(struct drm_device *dev,
+                                struct drm_gem_object *obj, size_t size);
 void drm_gem_object_handle_free(struct drm_gem_object *obj);
 void drm_gem_vm_open(struct vm_area_struct *vma);
 void drm_gem_vm_close(struct vm_area_struct *vma);