Revert "qla2xxx: prevent speculative execution"

CVE-2017-5753 (revert embargoed)
CVE-2017-5715 (revert embargoed)

This reverts commit fa24f391.
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>

drivers/scsi/qla2xxx/qla_mr.c

@@ -2302,12 +2302,10 @@ qlafx00_status_entry(scsi_qla_host_t *vha, struct rsp_que *rsp, void *pkt)
 	req = ha->req_q_map[que];
 
 	/* Validate handle. */
-	if (handle < req->num_outstanding_cmds) {
-		gmb();
+	if (handle < req->num_outstanding_cmds)
 		sp = req->outstanding_cmds[handle];
-	} else {
+	else
 		sp = NULL;
-	}
 
 	if (sp == NULL) {
 		ql_dbg(ql_dbg_io, vha, 0x3034,
@@ -2655,12 +2653,10 @@ qlafx00_multistatus_entry(struct scsi_qla_host *vha,
 		req = ha->req_q_map[que];
 
 		/* Validate handle. */
-		if (handle < req->num_outstanding_cmds) {
-			gmb();
+		if (handle < req->num_outstanding_cmds)
 			sp = req->outstanding_cmds[handle];
-		} else {
+		else
 			sp = NULL;
-		}
 
 		if (sp == NULL) {
 			ql_dbg(ql_dbg_io, vha, 0x3044,