Patch "gpu: lontium-lt9611: Fix NULL pointer dereference in lt9611_connector_init()" has been added to the 6.0-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    gpu: lontium-lt9611: Fix NULL pointer dereference in lt9611_connector_init()

to the 6.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     gpu-lontium-lt9611-fix-null-pointer-dereference-in-l.patch
and it can be found in the queue-6.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 1e6acc9484262499cdc1df7b7051273c3341a80a
Author: Zeng Jingxiang <linuszeng@xxxxxxxxxxx>
Date:   Wed Jul 27 15:31:19 2022 +0800

    gpu: lontium-lt9611: Fix NULL pointer dereference in lt9611_connector_init()
    
    [ Upstream commit ef8886f321c5dab8124b9153d25afa2a71d05323 ]
    
    A NULL check for bridge->encoder shows that it may be NULL, but it
    already been dereferenced on all paths leading to the check.
    812     if (!bridge->encoder) {
    
    Dereference the pointer bridge->encoder.
    810     drm_connector_attach_encoder(&lt9611->connector, bridge->encoder);
    
    Signed-off-by: Zeng Jingxiang <linuszeng@xxxxxxxxxxx>
    Signed-off-by: Robert Foss <robert.foss@xxxxxxxxxx>
    Link: https://patchwork.freedesktop.org/patch/msgid/20220727073119.1578972-1-zengjx95@xxxxxxxxx
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/gpu/drm/bridge/lontium-lt9611.c b/drivers/gpu/drm/bridge/lontium-lt9611.c
index 8a60e83482a0..5fccacc159f0 100644
--- a/drivers/gpu/drm/bridge/lontium-lt9611.c
+++ b/drivers/gpu/drm/bridge/lontium-lt9611.c
@@ -813,13 +813,14 @@ static int lt9611_connector_init(struct drm_bridge *bridge, struct lt9611 *lt961
 
 	drm_connector_helper_add(&lt9611->connector,
 				 &lt9611_bridge_connector_helper_funcs);
-	drm_connector_attach_encoder(&lt9611->connector, bridge->encoder);
 
 	if (!bridge->encoder) {
 		DRM_ERROR("Parent encoder object not found");
 		return -ENODEV;
 	}
 
+	drm_connector_attach_encoder(&lt9611->connector, bridge->encoder);
+
 	return 0;
 }