drm/i915: unload: fix intel dp encoder cleanup

struct intel_dp contains both struct intel_encoder at the beginning (as
it's base-class) and an i2c adapater. When initializing, the i2c adapter
gets assigned

	intel_encoder->ddc_adaptor = &intel_dp->adapter

and the generic intel_encode_destroy happily calls kfree on this pointer.
Ouch. Fix this by using a dp specific cleanup function.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 51d1429..b1fc65b 100644 (file)
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1479,6 +1479,15 @@ intel_dp_destroy (struct drm_connector *connector)
        kfree(connector);
 }
 
+static void intel_dp_encoder_destroy(struct drm_encoder *encoder)
+{
+       struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+       i2c_del_adapter(&intel_dp->adapter);
+       drm_encoder_cleanup(encoder);
+       kfree(intel_dp);
+}
+
 static const struct drm_encoder_helper_funcs intel_dp_helper_funcs = {
        .dpms = intel_dp_dpms,
        .mode_fixup = intel_dp_mode_fixup,
@@ -1501,7 +1510,7 @@ static const struct drm_connector_helper_funcs intel_dp_connector_helper_funcs =
 };
 
 static const struct drm_encoder_funcs intel_dp_enc_funcs = {
-       .destroy = intel_encoder_destroy,
+       .destroy = intel_dp_encoder_destroy,
 };
 
 void