linux-kernel - [PATCH 4.17 23/46] drm/amd/display: Clear connectors edid pointer

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Date:   Fri,  6 Jul 2018 07:46:44 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Mikita Lipski <mikita.lipski@....com>,
        Harry Wentland <Harry.Wentland@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.17 23/46] drm/amd/display: Clear connectors edid pointer

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mikita Lipski <mikita.lipski@....com>

commit 5326c4525d1b2d5f1519268dd305e19c9bd4ef56 upstream.

Clear connector's edid pointer on coonnector update, when unplugging
the display.

Fix poison EDID when hotplugging on previously used connector.

Signed-off-by: Mikita Lipski <mikita.lipski@....com>
Reviewed-by: Harry Wentland <Harry.Wentland@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -928,6 +928,7 @@ amdgpu_dm_update_connector_after_detect(
 		drm_mode_connector_update_edid_property(connector, NULL);
 		aconnector->num_modes = 0;
 		aconnector->dc_sink = NULL;
+		aconnector->edid = NULL;
 	}
 
 	mutex_unlock(&dev->mode_config.mutex);