From c884a1dc23c079b7a2c961b98b9a56dd4ed2c541 Mon Sep 17 00:00:00 2001
From: Poul-Henning Kamp <phk@FreeBSD.org>
Date: Thu, 6 Jan 2005 23:13:50 +0000
Subject: [PATCH] Close a theoretical race:  By the time the watchdog comes
 around the interface may have been stopped, so we should not restart it.

---
 sys/pci/if_sis.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/sys/pci/if_sis.c b/sys/pci/if_sis.c
index a933173b2587..e257db3510f9 100644
--- a/sys/pci/if_sis.c
+++ b/sys/pci/if_sis.c
@@ -2235,11 +2235,15 @@ sis_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 static void
 sis_watchdog(struct ifnet *ifp)
 {
-	struct sis_softc	*sc;
+	struct sis_softc *sc;
 
 	sc = ifp->if_softc;
 
 	SIS_LOCK(sc);
+	if (sc->sis_stopped) {
+		SIS_UNLOCK(sc);
+		return;
+	}
 
 	ifp->if_oerrors++;
 	printf("sis%d: watchdog timeout\n", sc->sis_unit);