[PATCH 2/2] drm/fsl-dcu: check for clk_prepare_enable() error

[Fabio Estevam]

From: Fabio Estevam <fabio.estevam at nxp.com>

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 at nxp.com>
---
 drivers/gpu/drm/fsl-dcu/fsl_tcon.c | 8 ++++++--
 1 file 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 2fbb7ee..b3d70a6 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;
-- 
2.7.4