drm/i915: Don't leak edid in intel_crt_detect_ddc()

commit c34f078675f505c4437919bb1897b1351f16a050 upstream.

In the path where intel_crt_detect_ddc() detects a CRT, if would return
true without freeing the edid.

Fixes: a2bd1f541f19 ("drm/i915: check whether we actually received an edid in detect_ddc")
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Daniel Vetter <daniel.vetter@intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: intel-gfx@lists.freedesktop.org
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1484922525-6131-1-git-send-email-ander.conselvan.de.oliveira@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Willy Tarreau <w@1wt.eu>

diff --git a/drivers/gpu/drm/i915/intel_crt.c b/drivers/gpu/drm/i915/intel_crt.c
index 53435a9d847e0e5e653ec225ee484329e6c640bd..93c80d7143efbbfd4f30fe3d5785b7bd4fde3683 100644 (file)
--- a/drivers/gpu/drm/i915/intel_crt.c
+++ b/drivers/gpu/drm/i915/intel_crt.c
@@ -428,6 +428,7 @@ static bool intel_crt_detect_ddc(struct drm_connector *connector)
        struct drm_i915_private *dev_priv = crt->base.base.dev->dev_private;
        struct edid *edid;
        struct i2c_adapter *i2c;
+       bool ret = false;
 
        BUG_ON(crt->base.type != INTEL_OUTPUT_ANALOG);
 
@@ -444,17 +445,17 @@ static bool intel_crt_detect_ddc(struct drm_connector *connector)
                 */
                if (!is_digital) {
                        DRM_DEBUG_KMS("CRT detected via DDC:0x50 [EDID]\n");
-                       return true;
+                       ret = true;
+               } else {
+                       DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
                }
-
-               DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [EDID reports a digital panel]\n");
        } else {
                DRM_DEBUG_KMS("CRT not detected via DDC:0x50 [no valid EDID found]\n");
        }
 
        kfree(edid);
 
-       return false;
+       return ret;
 }
 
 static enum drm_connector_status