From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
When doing a mode set with the special fb id -1, reject the mode set if
no fb is currently bound to the crtc.
Also remove the pointless list traversal to find the current crtc based
on the current crtc :)
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/drm_crtc.c | 14 ++++++--------
1 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 6fdaf6f..bbcecdb 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -1755,7 +1755,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
struct drm_mode_config *config = &dev->mode_config;
struct drm_mode_crtc *crtc_req = data;
struct drm_mode_object *obj;
- struct drm_crtc *crtc, *crtcfb;
+ struct drm_crtc *crtc;
struct drm_connector **connector_set = NULL, *connector;
struct drm_framebuffer *fb = NULL;
struct drm_display_mode *mode = NULL;
@@ -1782,14 +1782,12 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
/* If we have a mode we need a framebuffer. */
/* If we pass -1, set the mode with the currently bound fb */
if (crtc_req->fb_id == -1) {
- list_for_each_entry(crtcfb,
- &dev->mode_config.crtc_list, head) {
- if (crtcfb == crtc) {
- DRM_DEBUG_KMS("Using current fb for "
- "setmode\n");
- fb = crtc->fb;
- }
+ if (!crtc->fb) {
+ DRM_DEBUG_KMS("CRTC doesn't have current FB\n");
+ ret = -EINVAL;
+ goto out;
}
+ fb = crtc->fb;
} else {
obj = drm_mode_object_find(dev, crtc_req->fb_id,
DRM_MODE_OBJECT_FB);
--
1.7.3.4
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