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drm: Return error value from blob creation
Change drm_property_create_blob to return an ERR_PTR-encoded error on failure, so we can pass the failure reason down. Signed-off-by: Daniel Stone <daniels@collabora.com> Cc: Maarten Lankhorst <maarten.lankhorst@intel.com> Tested-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -4154,6 +4154,10 @@ done:
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* @dev: DRM device to create property for
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* @length: Length to allocate for blob data
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* @data: If specified, copies data into blob
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*
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* Returns:
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* New blob property with a single reference on success, or an ERR_PTR
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* value on failure.
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*/
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struct drm_property_blob *
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drm_property_create_blob(struct drm_device *dev, size_t length,
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@ -4163,11 +4167,11 @@ drm_property_create_blob(struct drm_device *dev, size_t length,
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int ret;
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if (!length)
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return NULL;
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return ERR_PTR(-EINVAL);
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blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
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if (!blob)
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return NULL;
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return ERR_PTR(-ENOMEM);
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blob->length = length;
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blob->dev = dev;
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@ -4181,7 +4185,7 @@ drm_property_create_blob(struct drm_device *dev, size_t length,
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if (ret) {
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kfree(blob);
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mutex_unlock(&dev->mode_config.blob_lock);
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return NULL;
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return ERR_PTR(-EINVAL);
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}
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kref_init(&blob->refcount);
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@ -4370,8 +4374,8 @@ static int drm_property_replace_global_blob(struct drm_device *dev,
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if (length && data) {
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new_blob = drm_property_create_blob(dev, length, data);
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if (!new_blob)
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return -EINVAL;
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if (IS_ERR(new_blob))
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return PTR_ERR(new_blob);
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}
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/* This does not need to be synchronised with blob_lock, as the
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