From: Greg Hackmann <ghackmann@google.com>
Date: Wed, 20 Nov 2013 20:10:35 +0000 (-0800)
Subject: video: adf: validate dpms state passed to blank
X-Git-Tag: firefly_0821_release~2958^2~224
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=07ae0a642318031900a9561862573d3b05416b7b;p=firefly-linux-kernel-4.4.55.git

video: adf: validate dpms state passed to blank

Change-Id: I3a4228d50fc4a2553b3e92e5675a94cbc6e71b8a
Signed-off-by: Greg Hackmann <ghackmann@google.com>
---

diff --git a/drivers/video/adf/adf_client.c b/drivers/video/adf/adf_client.c
index e4a792135072..bba873d34bbb 100644
--- a/drivers/video/adf/adf_client.c
+++ b/drivers/video/adf/adf_client.c
@@ -49,6 +49,9 @@ int adf_interface_blank(struct adf_interface *intf, u8 state)
 	if (!intf->ops || !intf->ops->blank)
 		return -EOPNOTSUPP;
 
+	if (state > DRM_MODE_DPMS_OFF)
+		return -EINVAL;
+
 	mutex_lock(&dev->client_lock);
 	if (state != DRM_MODE_DPMS_ON)
 		flush_kthread_worker(&dev->post_worker);