--- zzzz-none-000/linux-3.10.107/drivers/infiniband/hw/qib/qib_sysfs.c	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/drivers/infiniband/hw/qib/qib_sysfs.c	2021-02-04 17:41:59.000000000 +0000
@@ -586,8 +586,8 @@
 		container_of(device, struct qib_ibdev, ibdev.dev);
 	struct qib_devdata *dd = dd_from_dev(dev);
 
-	buf[sizeof dd->serial] = '\0';
-	memcpy(buf, dd->serial, sizeof dd->serial);
+	buf[sizeof(dd->serial)] = '\0';
+	memcpy(buf, dd->serial, sizeof(dd->serial));
 	strcat(buf, "\n");
 	return strlen(buf);
 }