From: Shannon Nelson <snelson@pensando.io>
Date: Tue, 21 Jul 2020 13:34:07 -0700
Subject: ionic: update eid test for overflow
Patch-mainline: v5.9-rc1
Git-commit: 3fbc9bb6ca32d12d4d32a7ae32abef67ac95f889
References: jsc#SLE-16649

Fix up our comparison to better handle a potential (but largely
unlikely) wrap around.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/pensando/ionic/ionic_lif.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -724,7 +724,7 @@ static bool ionic_notifyq_service(struct
 	eid = le64_to_cpu(comp->event.eid);
 
 	/* Have we run out of new completions to process? */
-	if (eid <= lif->last_eid)
+	if ((s64)(eid - lif->last_eid) <= 0)
 		return false;
 
 	lif->last_eid = eid;