[PATCH 2/3] xfstests: fix double set for SCRATCH_DEV when SCRATCH_DEV_POOL is set

[Miao Xie <miaox@cn.fujitsu.com>]

check script has moved the first device of SCRATCH_DEV_POOL and used it to set
SCRATCH_DEV. But the case 265 does the same thing again when it includes
common.rc. Fix it by setting SCRATCH_DEV just by check script.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
---
 common.config |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/common.config b/common.config
index 7bed1c5..a35954b 100644
--- a/common.config
+++ b/common.config
@@ -232,12 +232,13 @@ fi
 
 # a btrfs tester will set only SCRATCH_DEV_POOL, we will put first of its dev
 # to SCRATCH_DEV and rest to SCRATCH_DEV_POOL to maintain the backward compatibility
-if [ ! -z "$SCRATCH_DEV_POOL" ]; then
+if [ "$iam" == "check" -a ! -z "$SCRATCH_DEV_POOL" ]; then
     if [ ! -z "$SCRATCH_DEV" ]; then
         echo "common.config: Error: \$SCRATCH_DEV should be unset when \$SCRATCH_DEV_POOL is set"
         exit 1
     fi
-    SCRATCH_DEV=`echo $SCRATCH_DEV_POOL | awk '{print $1}'`
+    # the user may forget to export SCRATCH_DEV when he/she set SCRATCH_DEV_POOL.
+    export SCRATCH_DEV=`echo $SCRATCH_DEV_POOL | awk '{print $1}'`
     SCRATCH_DEV_POOL=`echo $SCRATCH_DEV_POOL | awk '{ for (i = 2; i <= NF; i++) print $i}'`
 fi
 
-- 
1.7.6.5