diff --git a/sys/dev/ipmi/ipmi.c b/sys/dev/ipmi/ipmi.c
--- a/sys/dev/ipmi/ipmi.c
+++ b/sys/dev/ipmi/ipmi.c
@@ -360,7 +360,7 @@
 		kreq->ir_request[req->msg.data_len + 7] =
 		    ipmi_ipmb_checksum(&kreq->ir_request[4],
 		    req->msg.data_len + 3);
-		error = ipmi_submit_driver_request(sc, kreq, MAX_TIMEOUT);
+		error = ipmi_submit_driver_request(sc, kreq);
 		if (error != 0)
 			return (error);
 
@@ -565,11 +565,10 @@
 
 /* Perform an internal driver request. */
 int
-ipmi_submit_driver_request(struct ipmi_softc *sc, struct ipmi_request *req,
-    int timo)
+ipmi_submit_driver_request(struct ipmi_softc *sc, struct ipmi_request *req)
 {
 
-	return (sc->ipmi_driver_request(sc, req, timo));
+	return (sc->ipmi_driver_request(sc, req));
 }
 
 /*
@@ -636,7 +635,7 @@
 
 	IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0),
 	    IPMI_RESET_WDOG, 0, 0);
-	error = ipmi_submit_driver_request(sc, req, 0);
+	error = ipmi_submit_driver_request(sc, req);
 	if (error) {
 		device_printf(sc->ipmi_dev, "Failed to reset watchdog\n");
 	} else if (req->ir_compcode == 0x80) {
@@ -677,7 +676,7 @@
 		req->ir_request[4] = 0;
 		req->ir_request[5] = 0;
 	}
-	error = ipmi_submit_driver_request(sc, req, 0);
+	error = ipmi_submit_driver_request(sc, req);
 	if (error) {
 		device_printf(sc->ipmi_dev, "Failed to set watchdog\n");
 	} else if (req->ir_compcode != 0) {
@@ -812,7 +811,7 @@
 	    IPMI_CHASSIS_CONTROL, 1, 0);
 	req->ir_request[0] = IPMI_CC_POWER_CYCLE;
 
-	ipmi_submit_driver_request(sc, req, MAX_TIMEOUT);
+	ipmi_submit_driver_request(sc, req);
 
 	if (req->ir_error != 0 || req->ir_compcode != 0) {
 		device_printf(sc->ipmi_dev, "Power cycling via IPMI failed code %#x %#x\n",
@@ -859,7 +858,7 @@
 	IPMI_ALLOC_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0),
 	    IPMI_GET_DEVICE_ID, 0, 15);
 
-	error = ipmi_submit_driver_request(sc, req, MAX_TIMEOUT);
+	error = ipmi_submit_driver_request(sc, req);
 	if (error == EWOULDBLOCK) {
 		device_printf(dev, "Timed out waiting for GET_DEVICE_ID\n");
 		return;
@@ -888,7 +887,7 @@
 	IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0),
 	    IPMI_CLEAR_FLAGS, 1, 0);
 
-	ipmi_submit_driver_request(sc, req, 0);
+	ipmi_submit_driver_request(sc, req);
 
 	/* XXX: Magic numbers */
 	if (req->ir_compcode == 0xc0) {
@@ -903,7 +902,7 @@
 		    IPMI_GET_CHANNEL_INFO, 1, 0);
 		req->ir_request[0] = i;
 
-		error = ipmi_submit_driver_request(sc, req, 0);
+		error = ipmi_submit_driver_request(sc, req);
 
 		if (error != 0 || req->ir_compcode != 0)
 			break;
@@ -918,7 +917,7 @@
 		IPMI_INIT_DRIVER_REQUEST(req, IPMI_ADDR(IPMI_APP_REQUEST, 0),
 		    IPMI_GET_WDOG, 0, 0);
 
-		error = ipmi_submit_driver_request(sc, req, 0);
+		error = ipmi_submit_driver_request(sc, req);
 
 		if (error == 0 && req->ir_compcode == 0x00) {
 			device_printf(dev, "Attached watchdog\n");
diff --git a/sys/dev/ipmi/ipmi_bt.c b/sys/dev/ipmi/ipmi_bt.c
--- a/sys/dev/ipmi/ipmi_bt.c
+++ b/sys/dev/ipmi/ipmi_bt.c
@@ -85,7 +85,7 @@
 #define	 BT_IM_BMC_HWRST	(1L << 7)
 
 static int bt_polled_request(struct ipmi_softc *, struct ipmi_request *);
-static int bt_driver_request(struct ipmi_softc *, struct ipmi_request *, int);
+static int bt_driver_request(struct ipmi_softc *, struct ipmi_request *);
 static int bt_wait(struct ipmi_softc *, uint8_t, uint8_t);
 static int bt_reset(struct ipmi_softc *);
 
@@ -247,7 +247,7 @@
 	IPMI_LOCK(sc);
 	while ((req = ipmi_dequeue_request(sc)) != NULL) {
 		IPMI_UNLOCK(sc);
-		(void)bt_driver_request(sc, req, 0);
+		(void)bt_driver_request(sc, req);
 		IPMI_LOCK(sc);
 		sc->ipmi_bt_seq++;
 		ipmi_complete_request(sc, req);
@@ -265,7 +265,7 @@
 }
 
 static int
-bt_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, int timo __unused)
+bt_driver_request(struct ipmi_softc *sc, struct ipmi_request *req)
 {
 	int i, ok;
 
diff --git a/sys/dev/ipmi/ipmi_kcs.c b/sys/dev/ipmi/ipmi_kcs.c
--- a/sys/dev/ipmi/ipmi_kcs.c
+++ b/sys/dev/ipmi/ipmi_kcs.c
@@ -488,13 +488,13 @@
 }
 
 static int
-kcs_driver_request_queue(struct ipmi_softc *sc, struct ipmi_request *req, int timo)
+kcs_driver_request_queue(struct ipmi_softc *sc, struct ipmi_request *req)
 {
 	int error;
 
 	IPMI_LOCK(sc);
 	ipmi_polled_enqueue_request_highpri(sc, req);
-	error = msleep(req, &sc->ipmi_requests_lock, 0, "ipmireq", timo);
+	error = msleep(req, &sc->ipmi_requests_lock, 0, "ipmireq", 0);
 	if (error == 0)
 		error = req->ir_error;
 	IPMI_UNLOCK(sc);
@@ -517,13 +517,13 @@
 }
 
 static int
-kcs_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, int timo)
+kcs_driver_request(struct ipmi_softc *sc, struct ipmi_request *req)
 {
 
 	if (KERNEL_PANICKED() || dumping)
 		return (kcs_driver_request_poll(sc, req));
 	else
-		return (kcs_driver_request_queue(sc, req, timo));
+		return (kcs_driver_request_queue(sc, req));
 }
 
 
diff --git a/sys/dev/ipmi/ipmi_opal.c b/sys/dev/ipmi/ipmi_opal.c
--- a/sys/dev/ipmi/ipmi_opal.c
+++ b/sys/dev/ipmi/ipmi_opal.c
@@ -142,8 +142,7 @@
 }
 
 static int
-opal_ipmi_polled_request(struct opal_ipmi_softc *sc, struct ipmi_request *req,
-    int timo)
+opal_ipmi_polled_request(struct opal_ipmi_softc *sc, struct ipmi_request *req)
 {
 	uint64_t msg_len;
 	int err;
@@ -192,7 +191,7 @@
 		goto out;
 	}
 
-	if ((err = opal_ipmi_recv(sc, &msg_len, timo)) == 0) {
+	if ((err = opal_ipmi_recv(sc, &msg_len, 0)) == 0) {
 		/* Subtract one extra for the completion code. */
 		req->ir_replylen = msg_len - sizeof(struct opal_ipmi_msg) - 1;
 		req->ir_replylen = min(req->ir_replylen, req->ir_replybuflen);
@@ -248,15 +247,14 @@
 }
 
 static int
-opal_ipmi_driver_request(struct ipmi_softc *isc, struct ipmi_request *req,
-    int timo)
+opal_ipmi_driver_request(struct ipmi_softc *isc, struct ipmi_request *req)
 {
 	struct opal_ipmi_softc *sc = (struct opal_ipmi_softc *)isc;
 	int i, err;
 
 	for (i = 0; i < 3; i++) {
 		IPMI_LOCK(&sc->ipmi);
-		err = opal_ipmi_polled_request(sc, req, timo);
+		err = opal_ipmi_polled_request(sc, req);
 		IPMI_UNLOCK(&sc->ipmi);
 		if (err == 0)
 			break;
diff --git a/sys/dev/ipmi/ipmi_smic.c b/sys/dev/ipmi/ipmi_smic.c
--- a/sys/dev/ipmi/ipmi_smic.c
+++ b/sys/dev/ipmi/ipmi_smic.c
@@ -388,7 +388,7 @@
 }
 
 static int
-smic_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, int timo)
+smic_driver_request(struct ipmi_softc *sc, struct ipmi_request *req)
 {
 	int i, ok;
 
diff --git a/sys/dev/ipmi/ipmi_ssif.c b/sys/dev/ipmi/ipmi_ssif.c
--- a/sys/dev/ipmi/ipmi_ssif.c
+++ b/sys/dev/ipmi/ipmi_ssif.c
@@ -359,15 +359,14 @@
 }
 
 static int
-ssif_driver_request(struct ipmi_softc *sc, struct ipmi_request *req, int timo)
+ssif_driver_request(struct ipmi_softc *sc, struct ipmi_request *req)
 {
 	int error;
 
 	IPMI_LOCK(sc);
 	error = ipmi_polled_enqueue_request(sc, req);
 	if (error == 0)
-		error = msleep(req, &sc->ipmi_requests_lock, 0, "ipmireq",
-		    timo);
+		error = msleep(req, &sc->ipmi_requests_lock, 0, "ipmireq", 0);
 	if (error == 0)
 		error = req->ir_error;
 	IPMI_UNLOCK(sc);
diff --git a/sys/dev/ipmi/ipmivars.h b/sys/dev/ipmi/ipmivars.h
--- a/sys/dev/ipmi/ipmivars.h
+++ b/sys/dev/ipmi/ipmivars.h
@@ -133,7 +133,7 @@
 	driver_intr_t		*ipmi_intr;
 	int			(*ipmi_startup)(struct ipmi_softc *);
 	int			(*ipmi_enqueue_request)(struct ipmi_softc *, struct ipmi_request *);
-	int			(*ipmi_driver_request)(struct ipmi_softc *, struct ipmi_request *, int);
+	int			(*ipmi_driver_request)(struct ipmi_softc *, struct ipmi_request *);
 };
 
 #define	ipmi_ssif_smbus_address		_iface.ssif.smbus_address
@@ -247,8 +247,7 @@
 void	ipmi_free_request(struct ipmi_request *);
 int	ipmi_polled_enqueue_request(struct ipmi_softc *, struct ipmi_request *);
 int	ipmi_polled_enqueue_request_highpri(struct ipmi_softc *, struct ipmi_request *);
-int	ipmi_submit_driver_request(struct ipmi_softc *, struct ipmi_request *,
-	    int);
+int	ipmi_submit_driver_request(struct ipmi_softc *, struct ipmi_request *);
 
 /* Identify BMC interface via SMBIOS. */
 int	ipmi_smbios_identify(struct ipmi_get_info *);