Den 05.01.2018 20.14, skrev David Lechner:
On 01/05/2018 10:56 AM, Noralf Trønnes wrote:
Embed the mode in tinydrm_connector instead of doing an devm_ allocation. Remove unnecessary use of ret variable at the end of tinydrm_display_pipe_init().
Signed-off-by: Noralf Trønnes noralf@tronnes.org
drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c | 34 +++++++++++------------------ 1 file changed, 13 insertions(+), 21 deletions(-)
diff --git a/drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c b/drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c index f41fc506ff87..dadd26d53216 100644 --- a/drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c +++ b/drivers/gpu/drm/tinydrm/core/tinydrm-pipe.c @@ -15,7 +15,7 @@ struct tinydrm_connector { struct drm_connector base; - const struct drm_display_mode *mode; + struct drm_display_mode mode; }; static inline struct tinydrm_connector * @@ -29,7 +29,7 @@ static int tinydrm_connector_get_modes(struct drm_connector *connector) struct tinydrm_connector *tconn = to_tinydrm_connector(connector); struct drm_display_mode *mode; - mode = drm_mode_duplicate(connector->dev, tconn->mode); + mode = drm_mode_duplicate(connector->dev, &tconn->mode); if (!mode) { DRM_ERROR("Failed to duplicate mode\n"); return 0; @@ -92,7 +92,7 @@ tinydrm_connector_create(struct drm_device *drm, if (!tconn) return ERR_PTR(-ENOMEM); - tconn->mode = mode; + tconn->mode = *mode;
I see there is a special drm_mode_copy() function, so I am wondering if this is safe.
It is safe, the underlying drm_mode_object isn't initialized/registered. So to me an assignment like this makes it clear that it is so, but Laurent also asked about this, so maybe I'm the odd one here. I'll switch to drm_mode_copy().
Noralf.
connector = &tconn->base; drm_connector_helper_add(connector, &tinydrm_connector_hfuncs); @@ -199,35 +199,27 @@ tinydrm_display_pipe_init(struct tinydrm_device *tdev, unsigned int rotation) { struct drm_device *drm = tdev->drm; - struct drm_display_mode *mode_copy; + struct drm_display_mode mode_copy; struct drm_connector *connector; int ret; - mode_copy = devm_kmalloc(drm->dev, sizeof(*mode_copy), GFP_KERNEL); - if (!mode_copy) - return -ENOMEM;
- *mode_copy = *mode; - ret = tinydrm_rotate_mode(mode_copy, rotation); + mode_copy = *mode;
Same here.
+ ret = tinydrm_rotate_mode(&mode_copy, rotation); if (ret) { DRM_ERROR("Illegal rotation value %u\n", rotation); return -EINVAL; } - drm->mode_config.min_width = mode_copy->hdisplay; - drm->mode_config.max_width = mode_copy->hdisplay; - drm->mode_config.min_height = mode_copy->vdisplay; - drm->mode_config.max_height = mode_copy->vdisplay; + drm->mode_config.min_width = mode_copy.hdisplay; + drm->mode_config.max_width = mode_copy.hdisplay; + drm->mode_config.min_height = mode_copy.vdisplay; + drm->mode_config.max_height = mode_copy.vdisplay; - connector = tinydrm_connector_create(drm, mode_copy, connector_type); + connector = tinydrm_connector_create(drm, &mode_copy, connector_type); if (IS_ERR(connector)) return PTR_ERR(connector); - ret = drm_simple_display_pipe_init(drm, &tdev->pipe, funcs, formats, - format_count, NULL, connector); - if (ret) - return ret;
- return 0; + return drm_simple_display_pipe_init(drm, &tdev->pipe, funcs, formats, + format_count, NULL, connector); } EXPORT_SYMBOL(tinydrm_display_pipe_init);