drm/nouveau/fbcon: bracket entrypoints with a per-device enabled check

We don't necessarily have fbcon on all devices these days.

Fixes suspend on (at least) Quadro NVS 450.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_fbcon.c b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
index c80b519..7903e0e 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_fbcon.c
+++ b/drivers/gpu/drm/nouveau/nouveau_fbcon.c
@@ -503,34 +503,45 @@ nouveau_fbcon_fini(struct drm_device *dev)
        drm->fbcon = NULL;
 }
 
-void nouveau_fbcon_save_disable_accel(struct drm_device *dev)
+void
+nouveau_fbcon_save_disable_accel(struct drm_device *dev)
 {
        struct nouveau_drm *drm = nouveau_drm(dev);
-
-       drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
-       drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
+       if (drm->fbcon) {
+               drm->fbcon->saved_flags = drm->fbcon->helper.fbdev->flags;
+               drm->fbcon->helper.fbdev->flags |= FBINFO_HWACCEL_DISABLED;
+       }
 }
 
-void nouveau_fbcon_restore_accel(struct drm_device *dev)
+void
+nouveau_fbcon_restore_accel(struct drm_device *dev)
 {
        struct nouveau_drm *drm = nouveau_drm(dev);
-       drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
+       if (drm->fbcon) {
+               drm->fbcon->helper.fbdev->flags = drm->fbcon->saved_flags;
+       }
 }
 
-void nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
+void
+nouveau_fbcon_set_suspend(struct drm_device *dev, int state)
 {
        struct nouveau_drm *drm = nouveau_drm(dev);
-       console_lock();
-       if (state == 0)
-               nouveau_fbcon_save_disable_accel(dev);
-       fb_set_suspend(drm->fbcon->helper.fbdev, state);
-       if (state == 1)
-               nouveau_fbcon_restore_accel(dev);
-       console_unlock();
+       if (drm->fbcon) {
+               console_lock();
+               if (state == 0)
+                       nouveau_fbcon_save_disable_accel(dev);
+               fb_set_suspend(drm->fbcon->helper.fbdev, state);
+               if (state == 1)
+                       nouveau_fbcon_restore_accel(dev);
+               console_unlock();
+       }
 }
 
-void nouveau_fbcon_zfill_all(struct drm_device *dev)
+void
+nouveau_fbcon_zfill_all(struct drm_device *dev)
 {
        struct nouveau_drm *drm = nouveau_drm(dev);
-       nouveau_fbcon_zfill(dev, drm->fbcon);
+       if (drm->fbcon) {
+               nouveau_fbcon_zfill(dev, drm->fbcon);
+       }
 }