From 4a28ae58c0abad2d45a45db21e86c7166b2b4462 Mon Sep 17 00:00:00 2001 From: Paulo Zanoni Date: Wed, 9 Oct 2013 13:52:36 -0300 Subject: [PATCH] drm/i915: don't leak dp_connector at intel_ddi_init Regression introduced by: commit 311a20949f047a70935d6591010f42336f5402e7 Author: Paulo Zanoni drm/i915: don't init DP or HDMI when not supported by DDI port Since the commit above it is possible to have a DDI encoder that has the HDMI connector but not the DP connector (in case the port doesn't support DP). In this case, we must properly free the DP connector. We just leak this once, so it's not a big deal. Reported by kmemleak. Signed-off-by: Paulo Zanoni Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_ddi.c | 62 +++++++++++++++++++++----------- 1 file changed, 42 insertions(+), 20 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_ddi.c b/drivers/gpu/drm/i915/intel_ddi.c index 6d335f8ca343..31f4fe271388 100644 --- a/drivers/gpu/drm/i915/intel_ddi.c +++ b/drivers/gpu/drm/i915/intel_ddi.c @@ -1345,6 +1345,41 @@ static const struct drm_encoder_funcs intel_ddi_funcs = { .destroy = intel_ddi_destroy, }; +static struct intel_connector * +intel_ddi_init_dp_connector(struct intel_digital_port *intel_dig_port) +{ + struct intel_connector *connector; + enum port port = intel_dig_port->port; + + connector = kzalloc(sizeof(*connector), GFP_KERNEL); + if (!connector) + return NULL; + + intel_dig_port->dp.output_reg = DDI_BUF_CTL(port); + if (!intel_dp_init_connector(intel_dig_port, connector)) { + kfree(connector); + return NULL; + } + + return connector; +} + +static struct intel_connector * +intel_ddi_init_hdmi_connector(struct intel_digital_port *intel_dig_port) +{ + struct intel_connector *connector; + enum port port = intel_dig_port->port; + + connector = kzalloc(sizeof(*connector), GFP_KERNEL); + if (!connector) + return NULL; + + intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port); + intel_hdmi_init_connector(intel_dig_port, connector); + + return connector; +} + void intel_ddi_init(struct drm_device *dev, enum port port) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -1369,12 +1404,6 @@ void intel_ddi_init(struct drm_device *dev, enum port port) if (!intel_dig_port) return; - dp_connector = kzalloc(sizeof(*dp_connector), GFP_KERNEL); - if (!dp_connector) { - kfree(intel_dig_port); - return; - } - intel_encoder = &intel_dig_port->base; encoder = &intel_encoder->base; @@ -1394,29 +1423,22 @@ void intel_ddi_init(struct drm_device *dev, enum port port) intel_dig_port->saved_port_bits = I915_READ(DDI_BUF_CTL(port)) & (DDI_BUF_PORT_REVERSAL | DDI_A_4_LANES); - intel_dig_port->dp.output_reg = DDI_BUF_CTL(port); intel_encoder->type = INTEL_OUTPUT_UNKNOWN; intel_encoder->crtc_mask = (1 << 0) | (1 << 1) | (1 << 2); intel_encoder->cloneable = false; intel_encoder->hot_plug = intel_ddi_hot_plug; - if (init_dp && !intel_dp_init_connector(intel_dig_port, dp_connector)) { - drm_encoder_cleanup(encoder); - kfree(intel_dig_port); - kfree(dp_connector); - return; - } + if (init_dp) + dp_connector = intel_ddi_init_dp_connector(intel_dig_port); /* In theory we don't need the encoder->type check, but leave it just in * case we have some really bad VBTs... */ - if (intel_encoder->type != INTEL_OUTPUT_EDP && init_hdmi) { - hdmi_connector = kzalloc(sizeof(*hdmi_connector), - GFP_KERNEL); - if (!hdmi_connector) - return; + if (intel_encoder->type != INTEL_OUTPUT_EDP && init_hdmi) + hdmi_connector = intel_ddi_init_hdmi_connector(intel_dig_port); - intel_dig_port->hdmi.hdmi_reg = DDI_BUF_CTL(port); - intel_hdmi_init_connector(intel_dig_port, hdmi_connector); + if (!dp_connector && !hdmi_connector) { + drm_encoder_cleanup(encoder); + kfree(intel_dig_port); } }