HDMIservice: Improve error handling

CEC received message with invalid length is handled.
Plug and unplug is filtered to avoid duplicate events.

ST-Ericsson ID: 363062
ST-Ericsson FOSS-OUT ID: STETL-FOSS-OUT-10177

Change-Id: I989fab8e6b5504a5c4652aaac4f36d18fe8faa37
Signed-off-by: Per Persson <per.xb.persson@stericsson.com>
Reviewed-on: http://gerrit.lud.stericsson.com/gerrit/31658
Reviewed-by: QATOOLS
Reviewed-by: QABUILD
Reviewed-by: QATEST
Reviewed-by: Jimmy RUBIN <jimmy.rubin@stericsson.com>
Reviewed-by: Robert FEKETE <robert.fekete@stericsson.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/cec.c b/src/cec.c
index 30c95d8..4b6acf5 100644
--- a/src/cec.c
+++ b/src/cec.c
@@ -155,6 +155,9 @@ int cecrx(void)
 	cecsize = read(cecreadfd, buf, sizeof(buf));
 	close(cecreadfd);
 
+	if (cecsize < 0)
+		return -1;
+
 	for (cnt = 0; cnt < cecsize; cnt++)
 		LOGHDMILIB2("cecrx[%d]:%x", cnt, buf[cnt]);