From 541cc966915b6756e54c20eebe60ae957afdb537 Mon Sep 17 00:00:00 2001
From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Mon, 6 Dec 2010 11:24:07 +0000
Subject: [PATCH] drm: Don't try and disable an encoder that was never enabled
Prevents code that assumes that the encoder is active when asked to be
disabled from dying a horrible death.
Reported-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---
drivers/gpu/drm/drm_crtc_helper.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 7ca59359fee2..bede10a03407 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -241,7 +241,7 @@ void drm_helper_disable_unused_functions(struct drm_device *dev)
}
list_for_each_entry(encoder, &dev->mode_config.encoder_list, head) {
- if (!drm_helper_encoder_in_use(encoder)) {
+ if (encoder->crtc && !drm_helper_encoder_in_use(encoder)) {
drm_encoder_disable(encoder);
/* disconnector encoder from any connector */
encoder->crtc = NULL;
--
2.20.1