From: Jean-Francois Moine <moinejf@free.fr>
Date: Sat, 25 Jan 2014 17:14:43 +0000 (+0100)
Subject: drm/i2c: tda998x: check the CEC device creation
X-Git-Tag: firefly_0821_release~176^2~4105^2~61^2~24
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6ae668cc19e8;p=firefly-linux-kernel-4.4.55.git

drm/i2c: tda998x: check the CEC device creation

This patch checks if the CEC device is well created at intialization
time.

Tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/drivers/gpu/drm/i2c/tda998x_drv.c b/drivers/gpu/drm/i2c/tda998x_drv.c
index e62082654e01..c37180abcc4b 100644
--- a/drivers/gpu/drm/i2c/tda998x_drv.c
+++ b/drivers/gpu/drm/i2c/tda998x_drv.c
@@ -1144,6 +1144,8 @@ tda998x_encoder_init(struct i2c_client *client,
 
 	priv->current_page = 0;
 	priv->cec = i2c_new_dummy(client->adapter, 0x34);
+	if (!priv->cec)
+		return -ENODEV;
 	priv->dpms = DRM_MODE_DPMS_OFF;
 
 	encoder_slave->slave_priv = priv;