[PATCH] drm/kmb: fix potential memleak in error branch

[Bernard Zhao]

This patch try to fix coccicheck warning:
./drivers/gpu/drm/kmb/kmb_drv.c:519:2-8: ERROR: missing put_device; call 
of_find_device_by_node on line 506, but without a corresponding object release 
within this function.
./drivers/gpu/drm/kmb/kmb_drv.c:522:2-8: ERROR: missing put_device; call 
of_find_device_by_node on line 506, but without a corresponding object release 
within this function.
./drivers/gpu/drm/kmb/kmb_drv.c:529:2-8: ERROR: missing put_device; call 
of_find_device_by_node on line 506, but without a corresponding object release 
within this function.
./drivers/gpu/drm/kmb/kmb_drv.c:579:1-7: ERROR: missing put_device; call 
of_find_device_by_node on line 506, but without a corresponding object release 
within this function.

Signed-off-by: Bernard Zhao <bern...@vivo.com>
---
 drivers/gpu/drm/kmb/kmb_drv.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/kmb/kmb_drv.c b/drivers/gpu/drm/kmb/kmb_drv.c
index 961ac6fb5fcf..4a7178288ecf 100644
--- a/drivers/gpu/drm/kmb/kmb_drv.c
+++ b/drivers/gpu/drm/kmb/kmb_drv.c
@@ -514,8 +514,10 @@ static int kmb_probe(struct platform_device *pdev)
        ret = kmb_dsi_host_bridge_init(get_device(&dsi_pdev->dev));
 
        if (ret == -EPROBE_DEFER) {
+               of_dev_put(dsi_pdev);
                return -EPROBE_DEFER;
        } else if (ret) {
+               of_dev_put(dsi_pdev);
                DRM_ERROR("probe failed to initialize DSI host bridge\n");
                return ret;
        }
@@ -523,8 +525,10 @@ static int kmb_probe(struct platform_device *pdev)
        /* Create DRM device */
        kmb = devm_drm_dev_alloc(dev, &kmb_driver,
                                 struct kmb_drm_private, drm);
-       if (IS_ERR(kmb))
+       if (IS_ERR(kmb)) {
+               of_dev_put(dsi_pdev);
                return PTR_ERR(kmb);
+       }
 
        dev_set_drvdata(dev, &kmb->drm);
 
@@ -572,6 +576,8 @@ static int kmb_probe(struct platform_device *pdev)
        dev_set_drvdata(dev, NULL);
        kmb_dsi_host_unregister(kmb->kmb_dsi);
 
+       of_dev_put(dsi_pdev);
+
        return ret;
 }
 
-- 
2.33.1