xfs/078: remove loop device on failure

If the test fails for any reason, it fails to tear down the loop
device that was set up and hence the test device cannot be
unmounted, causing failures of subsequent tests.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

tests/xfs/078

@@ -37,6 +37,7 @@ _cleanup()
     cd /
     rm -f $tmp.*
     umount $LOOP_MNT 2>/dev/null
+    [ -n "$LOOP_DEV" ] && losetup -d $LOOP_DEV
     rmdir $LOOP_MNT
 }
 
@@ -62,6 +63,8 @@ _filter_io()
 
 # real QA test starts here
 
+rm -f $seqres.full
+
 echo "*** create loop mount point"
 rmdir $LOOP_MNT 2>/dev/null
 mkdir -p $LOOP_MNT || _fail "cannot create loopback mount point"
@@ -84,7 +87,7 @@ _grow_loop()
 	echo
 
 	echo "*** mkfs loop file (size=$original)"
-	$MKFS_XFS_PROG -b size=$bsize -d $dparam \
+	$MKFS_XFS_PROG -m crc=0 -b size=$bsize -d $dparam \
 		| _filter_mkfs 2>/dev/null
 
 	echo "*** extend loop file"
@@ -107,6 +110,7 @@ _grow_loop()
 		losetup $LOOP_DEV $LOOP_IMG
 		 _check_xfs_filesystem $LOOP_DEV none none
 		losetup -d $LOOP_DEV
+		LOOP_DEV=
 	fi
 
 	rm -f $LOOP_IMG