diff options
| author | Daniel Stone <daniels@collabora.com> | 2015-05-22 15:34:49 +0300 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-05-22 17:18:21 +0300 |
| commit | 99531d9bb76c649df15311c717deefdff7cc5b7b (patch) | |
| tree | c9d5451cf8038c831fee928eb92af8e280b3420d /drivers/gpu/drm/drm_crtc.c | |
| parent | 934a8a899a7275ed187810fe9a15a93397e88c6b (diff) | |
| download | linux-99531d9bb76c649df15311c717deefdff7cc5b7b.tar.xz | |
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: Daniel Stone <daniels@collabora.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@intel.com>
Tested-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index f6b0332aad7f..0844108e19e0 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -4145,6 +4145,16 @@ done: 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); @@ -4162,7 +4172,8 @@ drm_property_create_blob(struct drm_device *dev, size_t length, blob->length = length; blob->dev = dev; - memcpy(blob->data, data, length); + if (data) + memcpy(blob->data, data, length); mutex_lock(&dev->mode_config.blob_lock); |