[PATCH] drm/i915: Correctly refcount connectors in hw state readou

[Daniel Vetter]

This was forgotten when adding the the refcounting to
drm_connector_state.

v2: Don't forget to unreference existing connectors. This isn't
relevant on driver load, but this code also runs on resume, and there
we already have an atomic state. Spotted by Chris Wilson.

Cc: Gabriel Feceoru <gabriel.feceoru at intel.com>
Cc: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Marius Vlad <marius.c.vlad at intel.com>
Cc: Dave Airlie <airlied at redhat.com>
Fixes: d2307dea14a4 ("drm/atomic: use connector references (v3)")
Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 45c218db86be..6ba676f81bae 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12023,11 +12023,16 @@ static void intel_modeset_update_connector_atomic_state(struct drm_device *dev)
 	struct intel_connector *connector;
 
 	for_each_intel_connector(dev, connector) {
+		if (connector->base.state->crtc)
+			drm_connector_unreference(&connector->base);
+
 		if (connector->base.encoder) {
 			connector->base.state->best_encoder =
 				connector->base.encoder;
 			connector->base.state->crtc =
 				connector->base.encoder->crtc;
+
+			drm_connector_reference(&connector->base);
 		} else {
 			connector->base.state->best_encoder = NULL;
 			connector->base.state->crtc = NULL;
-- 
2.5.0