Clear existed ERST record before the test

If ERST table is full, the test can't begin. To avoid
this potential issue, if existing ERST record, erase
one record to relase the storage space and let the test
go on.

Because the ERST test maybe damges the data in the ERST
table, please restore the valid data in the ERST to the
other safe place.

Signed-off-by: Chen Gong <gong.chen@linux.intel.com>

1 files changed, 15 insertions, 3 deletions

diff --git a/cases/function/erst-inject/runtest.sh b/cases/function/erst-inject/runtest.sh
index c8922b7..540536c 100755
--- a/cases/function/erst-inject/runtest.sh
+++ b/cases/function/erst-inject/runtest.sh
@@ -50,13 +50,16 @@ Pay attention:
 
 This test is basic APEI/ERST functional test. In this test case, it will
 test ERST functionality of READ/WRITE/ERASE. Any error in the test
-procedure will be consider as failure and reported.
+procedure will be considered as failure and reported.
+
+Because the ERST test maybe damges the data in the ERST table, please
+restore the valid data in the ERST to the other safe place.
+
 ***************************************************************************
 
 
 EOF
 
-ID=0xdeadbeaf
 ERST=./erst-inject
 LOG=$TMP_DIR/erst.log.$$
 MODSTATUS=0
@@ -65,7 +68,7 @@ err()
 {
 	echo
 	echo ERROR: "$*"
-	echo ERROR: "Please check dmesg for further information"
+	echo ERROR: "Please check dmesg or log for further information"
 	echo -e "\n\nTEST FAILS"
 	exit 1
 }
@@ -85,6 +88,15 @@ fi
 which $ERST &> /dev/null
 [ $? -eq 0 ] || err "Please compile the test case first"
 
+# If ERST table is full, the test can't proceed. To ensure below
+# test can go on, if existing records, remove one first.
+COUNT=`$ERST -n|cut -d' ' -f5`
+if [ $COUNT -ne 0 ]; then
+	ID=`$ERST -p|grep "rcd id"|head -1|cut -d' ' -f3`
+	$ERST -c $ID 1>/dev/null
+fi
+
+ID=0xdeadbeaf
 echo -n "Write one error record into ERST... "
 $ERST -i $ID 1>/dev/null
 if [ ! $? -eq 0 ]; then