drm_plane_helper_check_update() currently uses crtc before testing whether we're disabling the plane (fb == NULL). Move the fb test before the first crtc usage so that crtc == NULL doesn't have to be handled by the caller.
Signed-off-by: Matt Roper matthew.d.roper@intel.com --- drivers/gpu/drm/drm_plane_helper.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c index ae61fb2..f24c4cf 100644 --- a/drivers/gpu/drm/drm_plane_helper.c +++ b/drivers/gpu/drm/drm_plane_helper.c @@ -142,6 +142,17 @@ int drm_plane_helper_check_update(struct drm_plane *plane, { int hscale, vscale;
+ if (!fb) { + *visible = false; + return 0; + } + + /* crtc should only be NULL when disabling (i.e., !fb) */ + if (WARN_ON(!crtc)) { + *visible = false; + return 0; + } + if (!crtc->enabled && !can_update_disabled) { DRM_DEBUG_KMS("Cannot update plane of a disabled CRTC.\n"); return -EINVAL; @@ -155,11 +166,6 @@ int drm_plane_helper_check_update(struct drm_plane *plane, return -ERANGE; }
- if (!fb) { - *visible = false; - return 0; - } - *visible = drm_rect_clip_scaled(src, dest, clip, hscale, vscale); if (!*visible) /*