[S390] qdio: change QDIO performance_stats error message priority

Signed-off-by: Ursula Braun <braunu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/drivers/s390/cio/qdio.c b/drivers/s390/cio/qdio.c
index 151636c..40a3208 100644
--- a/drivers/s390/cio/qdio.c
+++ b/drivers/s390/cio/qdio.c
@@ -3727,7 +3727,7 @@
 #endif /* CONFIG_64BIT */
 		}
 	} else {
-		QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
+		QDIO_PRINT_ERR("QDIO performance_stats: write 0 or 1 to this file!\n");
 		return -EINVAL;
 	}
 	return count;