drm/fsl-dcu: check for clk_prepare_enable() error

clk_prepare_enable() may fail, so we should better check its return
value.

Also place the of_node_put() function right after clk_prepare_enable(),
in order to avoid calling of_node_put() twice in case clk_prepare_enable()
fails.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Stefan Agner <stefan@agner.ch>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/gpu/drm/fsl-dcu/fsl_tcon.c b/drivers/gpu/drm/fsl-dcu/fsl_tcon.c
index 2fbb7eedb066..b3d70a63c5a3 100644
--- a/drivers/gpu/drm/fsl-dcu/fsl_tcon.c
+++ b/drivers/gpu/drm/fsl-dcu/fsl_tcon.c
@@ -87,9 +87,13 @@ struct fsl_tcon *fsl_tcon_init(struct device *dev)
                 goto err_node_put;
         }
 
-        of_node_put(np);
-        clk_prepare_enable(tcon->ipg_clk);
+        ret = clk_prepare_enable(tcon->ipg_clk);
+        if (ret) {
+                dev_err(dev, "Couldn't enable the TCON clock\n");
+                goto err_node_put;
+        }
 
+        of_node_put(np);
         dev_info(dev, "Using TCON in bypass mode\n");
 
         return tcon;