Make intel_dp_add_mst_connector handle error returns from the drm_ calls.
Add intel_connector_free to support cleanup on the error path.
v2: Rename new function to avoid confusion, and simplify error
paths (Ville)
v3: Indentation fixup, style fixes (Ville)
v4: Clarify usage of intel_connector_free, and fix usage of
intel_connector_free
Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Signed-off-by: James Ausmus <james.ausmus@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 13 +++++++++++++
drivers/gpu/drm/i915/intel_dp_mst.c | 27 ++++++++++++++++++++++-----
drivers/gpu/drm/i915/intel_drv.h | 1 +
3 files changed, 36 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index c4b224a3a0ee..725014bf6f0f 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -6146,6 +6146,19 @@ struct intel_connector *intel_connector_alloc(void)
return connector;
}
+/*
+ * Free the bits allocated by intel_connector_alloc.
+ * This should only be used after intel_connector_alloc has returned
+ * successfully, and before drm_connector_init returns successfully.
+ * Otherwise the destroy callbacks for the connector and the state should
+ * take care of proper cleanup/free
+ */
+void intel_connector_free(struct intel_connector *connector)
+{
+ kfree(to_intel_digital_connector_state(connector->base.state));
+ kfree(connector);
+}
+
/* Simple connector->get_hw_state implementation for encoders that support only
* one connector and no cloning and hence the encoder state determines the state
* of the connector. */
diff --git a/drivers/gpu/drm/i915/intel_dp_mst.c b/drivers/gpu/drm/i915/intel_dp_mst.c
index 9a396f483f8b..8ceffad3e665 100644
--- a/drivers/gpu/drm/i915/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/intel_dp_mst.c
@@ -450,14 +450,20 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
struct drm_device *dev = intel_dig_port->base.base.dev;
struct intel_connector *intel_connector;
struct drm_connector *connector;
- int i;
+ int i, ret;
intel_connector = intel_connector_alloc();
if (!intel_connector)
return NULL;
connector = &intel_connector->base;
- drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs, DRM_MODE_CONNECTOR_DisplayPort);
+ ret = drm_connector_init(dev, connector, &intel_dp_mst_connector_funcs,
+ DRM_MODE_CONNECTOR_DisplayPort);
+ if (ret) {
+ intel_connector_free(intel_connector);
+ return NULL;
+ }
+
drm_connector_helper_add(connector, &intel_dp_mst_connector_helper_funcs);
intel_connector->get_hw_state = intel_dp_mst_get_hw_state;
@@ -465,15 +471,26 @@ static struct drm_connector *intel_dp_add_mst_connector(struct drm_dp_mst_topolo
intel_connector->port = port;
for (i = PIPE_A; i <= PIPE_C; i++) {
- drm_mode_connector_attach_encoder(&intel_connector->base,
- &intel_dp->mst_encoders[i]->base.base);
+ struct drm_encoder *enc = &intel_dp->mst_encoders[i]->base.base;
+
+ ret = drm_mode_connector_attach_encoder(&intel_connector->base,
+ enc);
+ if (ret)
+ goto err;
}
drm_object_attach_property(&connector->base, dev->mode_config.path_property, 0);
drm_object_attach_property(&connector->base, dev->mode_config.tile_property, 0);
- drm_mode_connector_set_path_property(connector, pathprop);
+ ret = drm_mode_connector_set_path_property(connector, pathprop);
+ if (ret)
+ goto err;
+
return connector;
+
+err:
+ drm_connector_cleanup(connector);
+ return NULL;
}
static void intel_dp_register_mst_connector(struct drm_connector *connector)
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 0cab667fff57..b549a0b45e57 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1360,6 +1360,7 @@ void intel_pps_unlock_regs_wa(struct drm_i915_private *dev_priv);
void intel_encoder_destroy(struct drm_encoder *encoder);
int intel_connector_init(struct intel_connector *);
struct intel_connector *intel_connector_alloc(void);
+void intel_connector_free(struct intel_connector *connector);
bool intel_connector_get_hw_state(struct intel_connector *connector);
void intel_connector_attach_encoder(struct intel_connector *connector,
struct intel_encoder *encoder);
--
2.14.1
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