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Commit 99531d9b authored by Daniel Stone's avatar Daniel Stone Committed by Daniel Vetter
Browse files

drm: Allow creating blob properties without copy 



Make the data parameter to drm_property_create_blob optional; if
omitted, the copy will be skipped and the data will be empty.

Signed-off-by: default avatarDaniel Stone <daniels@collabora.com>
Reviewed-by: default avatarMaarten Lankhorst <maarten.lankhorst@intel.com>
Tested-by: default avatarSean Paul <seanpaul@chromium.org>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 934a8a89

drivers/gpu/drm/drm_crtc.c

+13 −2
Original line number Diff line number Diff line
@@ -4145,6 +4145,16 @@ int drm_mode_getproperty_ioctl(struct drm_device *dev, 
	return ret;

}



/**

 * drm_property_create_blob - Create new blob property

 *

 * Creates a new blob property for a specified DRM device, optionally

 * copying data.

 *

 * @dev: DRM device to create property for

 * @length: Length to allocate for blob data

 * @data: If specified, copies data into blob

 */

struct drm_property_blob *

drm_property_create_blob(struct drm_device *dev, size_t length,

			 const void *data)
@@ -4152,7 +4162,7 @@ drm_property_create_blob(struct drm_device *dev, size_t length, 
	struct drm_property_blob *blob;

	int ret;



	if (!length || !data)

	if (!length)

		return NULL;



	blob = kzalloc(sizeof(struct drm_property_blob)+length, GFP_KERNEL);
@@ -4162,6 +4172,7 @@ drm_property_create_blob(struct drm_device *dev, size_t length, 
	blob->length = length;

	blob->dev = dev;



	if (data)

		memcpy(blob->data, data, length);



	mutex_lock(&dev->mode_config.blob_lock);