[SCSI] zfcp: fix memory leak

fix memory leak.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>

drivers/s390/scsi/zfcp_scsi.c

@@ -764,7 +764,9 @@ zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
 		return;
 
 	ret = zfcp_fsf_exchange_port_data(NULL, adapter, data);
-	if (ret == 0) {
+	if (ret) {
+		kfree(data);
+	} else {
 		adapter->stats_reset = jiffies/HZ;
 		old_data = adapter->stats_reset_data;
 		adapter->stats_reset_data = data; /* finally freed in