[PATCH 4.4 55/67] gpu: ipu-v3: Fix imx-ipuv3-crtc module autoloading

[Greg Kroah-Hartman]

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

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

From: Philipp Zabel <p.za...@pengutronix.de>

commit 503fe87bd0a8346ba9d8b7f49115dcd0a4185226 upstream.

If of_node is set before calling platform_device_add, the driver core
will try to use of: modalias matching, which fails because the device
tree nodes don't have a compatible property set. This patch fixes
imx-ipuv3-crtc module autoloading by setting the of_node property only
after the platform modalias is set.

Fixes: 304e6be652e2 ("gpu: ipu-v3: Assign of_node of child platform devices to 
corresponding ports")
Reported-by: Dennis Gilmore <den...@ausil.us>
Signed-off-by: Philipp Zabel <p.za...@pengutronix.de>
Tested-By: Dennis Gilmore <den...@ausil.us>
Signed-off-by: Dave Airlie <airl...@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/gpu/ipu-v3/ipu-common.c |    7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

--- a/drivers/gpu/ipu-v3/ipu-common.c
+++ b/drivers/gpu/ipu-v3/ipu-common.c
@@ -1068,7 +1068,6 @@ static int ipu_add_client_devices(struct
                        goto err_register;
                }
 
-               pdev->dev.of_node = of_node;
                pdev->dev.parent = dev;
 
                ret = platform_device_add_data(pdev, &reg->pdata,
@@ -1079,6 +1078,12 @@ static int ipu_add_client_devices(struct
                        platform_device_put(pdev);
                        goto err_register;
                }
+
+               /*
+                * Set of_node only after calling platform_device_add. Otherwise
+                * the platform:imx-ipuv3-crtc modalias won't be used.
+                */
+               pdev->dev.of_node = of_node;
        }
 
        return 0;