Merge tag 'linux-can-next-for-3.15-20140307' of git://gitorious.org/linux-can/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2014-02-12

this is a pull request of twelve patches for net-next/master.

Alexander Shiyan contributes two patches for the mcp251x, one making
the driver more quiet and the other one improves the compile time
coverage by removing the #ifdef CONFIG_PM_SLEEP. Then two patches for
the flexcan driver by me, one removing the #ifdef CONFIG_PM_SLEEP, too,
the other one making use of platform_get_device_id(). Another patch by
me which converts the janz-ican3 driver to use netdev_<level>(). The
remaining 7 patches are by Oliver Hartkopp, they add CAN FD support to
the netlink configuration interface.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/can/dev.c

@@ -99,10 +99,10 @@ static int can_update_spt(const struct can_bittiming_const *btc,
 	return 1000 * (tseg + 1 - *tseg2) / (tseg + 1);
 }
 
-static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt)
+static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,
+			      const struct can_bittiming_const *btc)
 {
 	struct can_priv *priv = netdev_priv(dev);
-	const struct can_bittiming_const *btc = priv->bittiming_const;
 	long rate, best_rate = 0;
 	long best_error = 1000000000, error = 0;
 	int best_tseg = 0, best_brp = 0, brp = 0;
@@ -110,9 +110,6 @@ static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt)
 	int spt_error = 1000, spt = 0, sampl_pt;
 	u64 v64;
 
-	if (!priv->bittiming_const)
-		return -ENOTSUPP;
-
 	/* Use CIA recommended sample points */
 	if (bt->sample_point) {
 		sampl_pt = bt->sample_point;
@@ -204,7 +201,8 @@ static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt)
 	return 0;
 }
 #else /* !CONFIG_CAN_CALC_BITTIMING */
-static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt)
+static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt,
+			      const struct can_bittiming_const *btc)
 {
 	netdev_err(dev, "bit-timing calculation not available\n");
 	return -EINVAL;
@@ -217,16 +215,13 @@ static int can_calc_bittiming(struct net_device *dev, struct can_bittiming *bt)
  * prescaler value brp. You can find more information in the header
  * file linux/can/netlink.h.
  */
-static int can_fixup_bittiming(struct net_device *dev, struct can_bittiming *bt)
+static int can_fixup_bittiming(struct net_device *dev, struct can_bittiming *bt,
+			       const struct can_bittiming_const *btc)
 {
 	struct can_priv *priv = netdev_priv(dev);
-	const struct can_bittiming_const *btc = priv->bittiming_const;
 	int tseg1, alltseg;
 	u64 brp64;
 
-	if (!priv->bittiming_const)
-		return -ENOTSUPP;
-
 	tseg1 = bt->prop_seg + bt->phase_seg1;
 	if (!bt->sjw)
 		bt->sjw = 1;
@@ -254,26 +249,29 @@ static int can_fixup_bittiming(struct net_device *dev, struct can_bittiming *bt)
 	return 0;
 }
 
-static int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt)
+static int can_get_bittiming(struct net_device *dev, struct can_bittiming *bt,
+			     const struct can_bittiming_const *btc)
 {
-	struct can_priv *priv = netdev_priv(dev);
 	int err;
 
 	/* Check if the CAN device has bit-timing parameters */
-	if (priv->bittiming_const) {
+	if (!btc)
+		return -ENOTSUPP;
 
-		/* Non-expert mode? Check if the bitrate has been pre-defined */
-		if (!bt->tq)
-			/* Determine bit-timing parameters */
-			err = can_calc_bittiming(dev, bt);
+	/*
+	 * Depending on the given can_bittiming parameter structure the CAN
+	 * timing parameters are calculated based on the provided bitrate OR
+	 * alternatively the CAN timing parameters (tq, prop_seg, etc.) are
+	 * provided directly which are then checked and fixed up.
+	 */
+	if (!bt->tq && bt->bitrate)
+		err = can_calc_bittiming(dev, bt, btc);
+	else if (bt->tq && !bt->bitrate)
+		err = can_fixup_bittiming(dev, bt, btc);
 	else
-			/* Check bit-timing params and calculate proper brp */
-			err = can_fixup_bittiming(dev, bt);
-		if (err)
-			return err;
-	}
+		err = -EINVAL;
 
-	return 0;
+	return err;
 }
 
 /*
@@ -317,7 +315,9 @@ void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
 	BUG_ON(idx >= priv->echo_skb_max);
 
 	/* check flag whether this packet has to be looped back */
-	if (!(dev->flags & IFF_ECHO) || skb->pkt_type != PACKET_LOOPBACK) {
+	if (!(dev->flags & IFF_ECHO) || skb->pkt_type != PACKET_LOOPBACK ||
+	    (skb->protocol != htons(ETH_P_CAN) &&
+	     skb->protocol != htons(ETH_P_CANFD))) {
 		kfree_skb(skb);
 		return;
 	}
@@ -329,7 +329,6 @@ void can_put_echo_skb(struct sk_buff *skb, struct net_device *dev,
 			return;
 
 		/* make settings for echo to reduce code in irq context */
-		skb->protocol = htons(ETH_P_CAN);
 		skb->pkt_type = PACKET_BROADCAST;
 		skb->ip_summed = CHECKSUM_UNNECESSARY;
 		skb->dev = dev;
@@ -595,6 +594,39 @@ void free_candev(struct net_device *dev)
 }
 EXPORT_SYMBOL_GPL(free_candev);
 
+/*
+ * changing MTU and control mode for CAN/CANFD devices
+ */
+int can_change_mtu(struct net_device *dev, int new_mtu)
+{
+	struct can_priv *priv = netdev_priv(dev);
+
+	/* Do not allow changing the MTU while running */
+	if (dev->flags & IFF_UP)
+		return -EBUSY;
+
+	/* allow change of MTU according to the CANFD ability of the device */
+	switch (new_mtu) {
+	case CAN_MTU:
+		priv->ctrlmode &= ~CAN_CTRLMODE_FD;
+		break;
+
+	case CANFD_MTU:
+		if (!(priv->ctrlmode_supported & CAN_CTRLMODE_FD))
+			return -EINVAL;
+
+		priv->ctrlmode |= CAN_CTRLMODE_FD;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	dev->mtu = new_mtu;
+	return 0;
+}
+EXPORT_SYMBOL_GPL(can_change_mtu);
+
 /*
  * Common open function when the device gets opened.
  *
@@ -605,11 +637,19 @@ int open_candev(struct net_device *dev)
 {
 	struct can_priv *priv = netdev_priv(dev);
 
-	if (!priv->bittiming.tq && !priv->bittiming.bitrate) {
+	if (!priv->bittiming.bitrate) {
 		netdev_err(dev, "bit-timing not yet defined\n");
 		return -EINVAL;
 	}
 
+	/* For CAN FD the data bitrate has to be >= the arbitration bitrate */
+	if ((priv->ctrlmode & CAN_CTRLMODE_FD) &&
+	    (!priv->data_bittiming.bitrate ||
+	     (priv->data_bittiming.bitrate < priv->bittiming.bitrate))) {
+		netdev_err(dev, "incorrect/missing data bit-timing\n");
+		return -EINVAL;
+	}
+
 	/* Switch carrier on if device was stopped while in bus-off state */
 	if (!netif_carrier_ok(dev))
 		netif_carrier_on(dev);
@@ -648,6 +688,10 @@ static const struct nla_policy can_policy[IFLA_CAN_MAX + 1] = {
 				= { .len = sizeof(struct can_bittiming_const) },
 	[IFLA_CAN_CLOCK]	= { .len = sizeof(struct can_clock) },
 	[IFLA_CAN_BERR_COUNTER]	= { .len = sizeof(struct can_berr_counter) },
+	[IFLA_CAN_DATA_BITTIMING]
+				= { .len = sizeof(struct can_bittiming) },
+	[IFLA_CAN_DATA_BITTIMING_CONST]
+				= { .len = sizeof(struct can_bittiming_const) },
 };
 
 static int can_changelink(struct net_device *dev,
@@ -666,9 +710,7 @@ static int can_changelink(struct net_device *dev,
 		if (dev->flags & IFF_UP)
 			return -EBUSY;
 		memcpy(&bt, nla_data(data[IFLA_CAN_BITTIMING]), sizeof(bt));
-		if ((!bt.bitrate && !bt.tq) || (bt.bitrate && bt.tq))
-			return -EINVAL;
-		err = can_get_bittiming(dev, &bt);
+		err = can_get_bittiming(dev, &bt, priv->bittiming_const);
 		if (err)
 			return err;
 		memcpy(&priv->bittiming, &bt, sizeof(bt));
@@ -692,6 +734,12 @@ static int can_changelink(struct net_device *dev,
 			return -EOPNOTSUPP;
 		priv->ctrlmode &= ~cm->mask;
 		priv->ctrlmode |= cm->flags;
+
+		/* CAN_CTRLMODE_FD can only be set when driver supports FD */
+		if (priv->ctrlmode & CAN_CTRLMODE_FD)
+			dev->mtu = CANFD_MTU;
+		else
+			dev->mtu = CAN_MTU;
 	}
 
 	if (data[IFLA_CAN_RESTART_MS]) {
@@ -710,6 +758,27 @@ static int can_changelink(struct net_device *dev,
 			return err;
 	}
 
+	if (data[IFLA_CAN_DATA_BITTIMING]) {
+		struct can_bittiming dbt;
+
+		/* Do not allow changing bittiming while running */
+		if (dev->flags & IFF_UP)
+			return -EBUSY;
+		memcpy(&dbt, nla_data(data[IFLA_CAN_DATA_BITTIMING]),
+		       sizeof(dbt));
+		err = can_get_bittiming(dev, &dbt, priv->data_bittiming_const);
+		if (err)
+			return err;
+		memcpy(&priv->data_bittiming, &dbt, sizeof(dbt));
+
+		if (priv->do_set_data_bittiming) {
+			/* Finally, set the bit-timing registers */
+			err = priv->do_set_data_bittiming(dev);
+			if (err)
+				return err;
+		}
+	}
+
 	return 0;
 }
 
@@ -718,7 +787,8 @@ static size_t can_get_size(const struct net_device *dev)
 	struct can_priv *priv = netdev_priv(dev);
 	size_t size = 0;
 
-	size += nla_total_size(sizeof(struct can_bittiming));	/* IFLA_CAN_BITTIMING */
+	if (priv->bittiming.bitrate)				/* IFLA_CAN_BITTIMING */
+		size += nla_total_size(sizeof(struct can_bittiming));
 	if (priv->bittiming_const)				/* IFLA_CAN_BITTIMING_CONST */
 		size += nla_total_size(sizeof(struct can_bittiming_const));
 	size += nla_total_size(sizeof(struct can_clock));	/* IFLA_CAN_CLOCK */
@@ -727,6 +797,10 @@ static size_t can_get_size(const struct net_device *dev)
 	size += nla_total_size(sizeof(u32));			/* IFLA_CAN_RESTART_MS */
 	if (priv->do_get_berr_counter)				/* IFLA_CAN_BERR_COUNTER */
 		size += nla_total_size(sizeof(struct can_berr_counter));
+	if (priv->data_bittiming.bitrate)			/* IFLA_CAN_DATA_BITTIMING */
+		size += nla_total_size(sizeof(struct can_bittiming));
+	if (priv->data_bittiming_const)				/* IFLA_CAN_DATA_BITTIMING_CONST */
+		size += nla_total_size(sizeof(struct can_bittiming_const));
 
 	return size;
 }
@@ -740,19 +814,34 @@ static int can_fill_info(struct sk_buff *skb, const struct net_device *dev)
 
 	if (priv->do_get_state)
 		priv->do_get_state(dev, &state);
-	if (nla_put(skb, IFLA_CAN_BITTIMING,
-		    sizeof(priv->bittiming), &priv->bittiming) ||
+
+	if ((priv->bittiming.bitrate &&
+	     nla_put(skb, IFLA_CAN_BITTIMING,
+		     sizeof(priv->bittiming), &priv->bittiming)) ||
+
 	    (priv->bittiming_const &&
 	     nla_put(skb, IFLA_CAN_BITTIMING_CONST,
 		     sizeof(*priv->bittiming_const), priv->bittiming_const)) ||
+
 	    nla_put(skb, IFLA_CAN_CLOCK, sizeof(cm), &priv->clock) ||
 	    nla_put_u32(skb, IFLA_CAN_STATE, state) ||
 	    nla_put(skb, IFLA_CAN_CTRLMODE, sizeof(cm), &cm) ||
 	    nla_put_u32(skb, IFLA_CAN_RESTART_MS, priv->restart_ms) ||
+
 	    (priv->do_get_berr_counter &&
 	     !priv->do_get_berr_counter(dev, &bec) &&
-	     nla_put(skb, IFLA_CAN_BERR_COUNTER, sizeof(bec), &bec)))
+	     nla_put(skb, IFLA_CAN_BERR_COUNTER, sizeof(bec), &bec)) ||
+
+	    (priv->data_bittiming.bitrate &&
+	     nla_put(skb, IFLA_CAN_DATA_BITTIMING,
+		     sizeof(priv->data_bittiming), &priv->data_bittiming)) ||
+
+	    (priv->data_bittiming_const &&
+	     nla_put(skb, IFLA_CAN_DATA_BITTIMING_CONST,
+		     sizeof(*priv->data_bittiming_const),
+		     priv->data_bittiming_const)))
 		return -EMSGSIZE;
+
 	return 0;
 }
 

drivers/net/can/flexcan.c

@@ -1132,9 +1132,9 @@ static int flexcan_probe(struct platform_device *pdev)
 	of_id = of_match_device(flexcan_of_match, &pdev->dev);
 	if (of_id) {
 		devtype_data = of_id->data;
-	} else if (pdev->id_entry->driver_data) {
+	} else if (platform_get_device_id(pdev)->driver_data) {
 		devtype_data = (struct flexcan_devtype_data *)
-			pdev->id_entry->driver_data;
+			platform_get_device_id(pdev)->driver_data;
 	} else {
 		return -ENODEV;
 	}
@@ -1201,8 +1201,7 @@ static int flexcan_remove(struct platform_device *pdev)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-static int flexcan_suspend(struct device *device)
+static int __maybe_unused flexcan_suspend(struct device *device)
 {
 	struct net_device *dev = dev_get_drvdata(device);
 	struct flexcan_priv *priv = netdev_priv(dev);
@@ -1221,7 +1220,7 @@ static int flexcan_suspend(struct device *device)
 	return 0;
 }
 
-static int flexcan_resume(struct device *device)
+static int __maybe_unused flexcan_resume(struct device *device)
 {
 	struct net_device *dev = dev_get_drvdata(device);
 	struct flexcan_priv *priv = netdev_priv(dev);
@@ -1233,7 +1232,6 @@ static int flexcan_resume(struct device *device)
 	}
 	return flexcan_chip_enable(priv);
 }
-#endif /* CONFIG_PM_SLEEP */
 
 static SIMPLE_DEV_PM_OPS(flexcan_pm_ops, flexcan_suspend, flexcan_resume);
 

drivers/net/can/janz-ican3.c

@@ -198,9 +198,6 @@ struct ican3_dev {
 	struct net_device *ndev;
 	struct napi_struct napi;
 
-	/* Device for printing */
-	struct device *dev;
-
 	/* module number */
 	unsigned int num;
 
@@ -295,7 +292,7 @@ static int ican3_old_recv_msg(struct ican3_dev *mod, struct ican3_msg *msg)
 	xord = locl ^ peer;
 
 	if ((xord & MSYNC_RB_MASK) == 0x00) {
-		dev_dbg(mod->dev, "no mbox for reading\n");
+		netdev_dbg(mod->ndev, "no mbox for reading\n");
 		return -ENOMEM;
 	}
 
@@ -340,7 +337,7 @@ static int ican3_old_send_msg(struct ican3_dev *mod, struct ican3_msg *msg)
 	xord = locl ^ peer;
 
 	if ((xord & MSYNC_WB_MASK) == MSYNC_WB_MASK) {
-		dev_err(mod->dev, "no mbox for writing\n");
+		netdev_err(mod->ndev, "no mbox for writing\n");
 		return -ENOMEM;
 	}
 
@@ -542,7 +539,7 @@ static int ican3_new_send_msg(struct ican3_dev *mod, struct ican3_msg *msg)
 	memcpy_fromio(&desc, desc_addr, sizeof(desc));
 
 	if (!(desc.control & DESC_VALID)) {
-		dev_dbg(mod->dev, "%s: no free buffers\n", __func__);
+		netdev_dbg(mod->ndev, "%s: no free buffers\n", __func__);
 		return -ENOMEM;
 	}
 
@@ -573,7 +570,7 @@ static int ican3_new_recv_msg(struct ican3_dev *mod, struct ican3_msg *msg)
 	memcpy_fromio(&desc, desc_addr, sizeof(desc));
 
 	if (!(desc.control & DESC_VALID)) {
-		dev_dbg(mod->dev, "%s: no buffers to recv\n", __func__);
+		netdev_dbg(mod->ndev, "%s: no buffers to recv\n", __func__);
 		return -ENOMEM;
 	}
 
@@ -883,7 +880,7 @@ static void can_frame_to_ican3(struct ican3_dev *mod,
  */
 static void ican3_handle_idvers(struct ican3_dev *mod, struct ican3_msg *msg)
 {
-	dev_dbg(mod->dev, "IDVERS response: %s\n", msg->data);
+	netdev_dbg(mod->ndev, "IDVERS response: %s\n", msg->data);
 }
 
 static void ican3_handle_msglost(struct ican3_dev *mod, struct ican3_msg *msg)
@@ -899,7 +896,7 @@ static void ican3_handle_msglost(struct ican3_dev *mod, struct ican3_msg *msg)
 	 * error frame for userspace
 	 */
 	if (msg->spec == MSG_MSGLOST) {
-		dev_err(mod->dev, "lost %d control messages\n", msg->data[0]);
+		netdev_err(mod->ndev, "lost %d control messages\n", msg->data[0]);
 		return;
 	}
 
@@ -939,13 +936,13 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
 
 	/* we can only handle the SJA1000 part */
 	if (msg->data[1] != CEVTIND_CHIP_SJA1000) {
-		dev_err(mod->dev, "unable to handle errors on non-SJA1000\n");
+		netdev_err(mod->ndev, "unable to handle errors on non-SJA1000\n");
 		return -ENODEV;
 	}
 
 	/* check the message length for sanity */
 	if (le16_to_cpu(msg->len) < 6) {
-		dev_err(mod->dev, "error message too short\n");
+		netdev_err(mod->ndev, "error message too short\n");
 		return -EINVAL;
 	}
 
@@ -967,7 +964,7 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
 	 */
 	if (isrc == CEVTIND_BEI) {
 		int ret;
-		dev_dbg(mod->dev, "bus error interrupt\n");
+		netdev_dbg(mod->ndev, "bus error interrupt\n");
 
 		/* TX error */
 		if (!(ecc & ECC_DIR)) {
@@ -983,7 +980,7 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
 		 */
 		ret = ican3_set_buserror(mod, 1);
 		if (ret) {
-			dev_err(mod->dev, "unable to re-enable bus-error\n");
+			netdev_err(mod->ndev, "unable to re-enable bus-error\n");
 			return ret;
 		}
 
@@ -998,7 +995,7 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
 
 	/* data overrun interrupt */
 	if (isrc == CEVTIND_DOI || isrc == CEVTIND_LOST) {
-		dev_dbg(mod->dev, "data overrun interrupt\n");
+		netdev_dbg(mod->ndev, "data overrun interrupt\n");
 		cf->can_id |= CAN_ERR_CRTL;
 		cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
 		stats->rx_over_errors++;
@@ -1007,7 +1004,7 @@ static int ican3_handle_cevtind(struct ican3_dev *mod, struct ican3_msg *msg)
 
 	/* error warning + passive interrupt */
 	if (isrc == CEVTIND_EI) {
-		dev_dbg(mod->dev, "error warning + passive interrupt\n");
+		netdev_dbg(mod->ndev, "error warning + passive interrupt\n");
 		if (status & SR_BS) {
 			state = CAN_STATE_BUS_OFF;
 			cf->can_id |= CAN_ERR_BUSOFF;
@@ -1088,7 +1085,7 @@ static void ican3_handle_inquiry(struct ican3_dev *mod, struct ican3_msg *msg)
 		complete(&mod->termination_comp);
 		break;
 	default:
-		dev_err(mod->dev, "received an unknown inquiry response\n");
+		netdev_err(mod->ndev, "received an unknown inquiry response\n");
 		break;
 	}
 }
@@ -1096,7 +1093,7 @@ static void ican3_handle_inquiry(struct ican3_dev *mod, struct ican3_msg *msg)
 static void ican3_handle_unknown_message(struct ican3_dev *mod,
 					struct ican3_msg *msg)
 {
-	dev_warn(mod->dev, "received unknown message: spec 0x%.2x length %d\n",
+	netdev_warn(mod->ndev, "received unknown message: spec 0x%.2x length %d\n",
 			   msg->spec, le16_to_cpu(msg->len));
 }
 
@@ -1105,7 +1102,7 @@ static void ican3_handle_unknown_message(struct ican3_dev *mod,
  */
 static void ican3_handle_message(struct ican3_dev *mod, struct ican3_msg *msg)
 {
-	dev_dbg(mod->dev, "%s: modno %d spec 0x%.2x len %d bytes\n", __func__,
+	netdev_dbg(mod->ndev, "%s: modno %d spec 0x%.2x len %d bytes\n", __func__,
 			   mod->num, msg->spec, le16_to_cpu(msg->len));
 
 	switch (msg->spec) {
@@ -1406,7 +1403,7 @@ static int ican3_reset_module(struct ican3_dev *mod)
 		msleep(10);
 	} while (time_before(jiffies, start + HZ / 4));
 
-	dev_err(mod->dev, "failed to reset CAN module\n");
+	netdev_err(mod->ndev, "failed to reset CAN module\n");
 	return -ETIMEDOUT;
 }
 
@@ -1425,7 +1422,7 @@ static int ican3_startup_module(struct ican3_dev *mod)
 
 	ret = ican3_reset_module(mod);
 	if (ret) {
-		dev_err(mod->dev, "unable to reset module\n");
+		netdev_err(mod->ndev, "unable to reset module\n");
 		return ret;
 	}
 
@@ -1434,41 +1431,41 @@ static int ican3_startup_module(struct ican3_dev *mod)
 
 	ret = ican3_msg_connect(mod);
 	if (ret) {
-		dev_err(mod->dev, "unable to connect to module\n");
+		netdev_err(mod->ndev, "unable to connect to module\n");
 		return ret;
 	}
 
 	ican3_init_new_host_interface(mod);
 	ret = ican3_msg_newhostif(mod);
 	if (ret) {
-		dev_err(mod->dev, "unable to switch to new-style interface\n");
+		netdev_err(mod->ndev, "unable to switch to new-style interface\n");
 		return ret;
 	}
 
 	/* default to "termination on" */
 	ret = ican3_set_termination(mod, true);
 	if (ret) {
-		dev_err(mod->dev, "unable to enable termination\n");
+		netdev_err(mod->ndev, "unable to enable termination\n");
 		return ret;
 	}
 
 	/* default to "bus errors enabled" */
 	ret = ican3_set_buserror(mod, 1);
 	if (ret) {
-		dev_err(mod->dev, "unable to set bus-error\n");
+		netdev_err(mod->ndev, "unable to set bus-error\n");
 		return ret;
 	}
 
 	ican3_init_fast_host_interface(mod);
 	ret = ican3_msg_fasthostif(mod);
 	if (ret) {
-		dev_err(mod->dev, "unable to switch to fast host interface\n");
+		netdev_err(mod->ndev, "unable to switch to fast host interface\n");
 		return ret;
 	}
 
 	ret = ican3_set_id_filter(mod, true);
 	if (ret) {
-		dev_err(mod->dev, "unable to set acceptance filter\n");
+		netdev_err(mod->ndev, "unable to set acceptance filter\n");
 		return ret;
 	}
 
@@ -1487,14 +1484,14 @@ static int ican3_open(struct net_device *ndev)
 	/* open the CAN layer */
 	ret = open_candev(ndev);
 	if (ret) {
-		dev_err(mod->dev, "unable to start CAN layer\n");
+		netdev_err(mod->ndev, "unable to start CAN layer\n");
 		return ret;
 	}
 
 	/* bring the bus online */
 	ret = ican3_set_bus_state(mod, true);
 	if (ret) {
-		dev_err(mod->dev, "unable to set bus-on\n");
+		netdev_err(mod->ndev, "unable to set bus-on\n");
 		close_candev(ndev);
 		return ret;
 	}
@@ -1518,7 +1515,7 @@ static int ican3_stop(struct net_device *ndev)
 	/* bring the bus offline, stop receiving packets */
 	ret = ican3_set_bus_state(mod, false);
 	if (ret) {
-		dev_err(mod->dev, "unable to set bus-off\n");
+		netdev_err(mod->ndev, "unable to set bus-off\n");
 		return ret;
 	}
 
@@ -1545,7 +1542,7 @@ static int ican3_xmit(struct sk_buff *skb, struct net_device *ndev)
 
 	/* check that we can actually transmit */
 	if (!ican3_txok(mod)) {
-		dev_err(mod->dev, "BUG: no free descriptors\n");
+		netdev_err(mod->ndev, "BUG: no free descriptors\n");
 		spin_unlock_irqrestore(&mod->lock, flags);
 		return NETDEV_TX_BUSY;
 	}
@@ -1657,7 +1654,7 @@ static int ican3_set_mode(struct net_device *ndev, enum can_mode mode)
 	/* bring the bus online */
 	ret = ican3_set_bus_state(mod, true);
 	if (ret) {
-		dev_err(mod->dev, "unable to set bus-on\n");
+		netdev_err(ndev, "unable to set bus-on\n");
 		return ret;
 	}
 
@@ -1682,7 +1679,7 @@ static int ican3_get_berr_counter(const struct net_device *ndev,
 
 	ret = wait_for_completion_timeout(&mod->buserror_comp, HZ);
 	if (ret == 0) {
-		dev_info(mod->dev, "%s timed out\n", __func__);
+		netdev_info(mod->ndev, "%s timed out\n", __func__);
 		return -ETIMEDOUT;
 	}
 
@@ -1708,7 +1705,7 @@ static ssize_t ican3_sysfs_show_term(struct device *dev,
 
 	ret = wait_for_completion_timeout(&mod->termination_comp, HZ);
 	if (ret == 0) {
-		dev_info(mod->dev, "%s timed out\n", __func__);
+		netdev_info(mod->ndev, "%s timed out\n", __func__);
 		return -ETIMEDOUT;
 	}
 
@@ -1778,7 +1775,6 @@ static int ican3_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, ndev);
 	mod = netdev_priv(ndev);
 	mod->ndev = ndev;
-	mod->dev = &pdev->dev;
 	mod->num = pdata->modno;
 	netif_napi_add(ndev, &mod->napi, ican3_napi, ICAN3_RX_BUFFERS);
 	skb_queue_head_init(&mod->echoq);

drivers/net/can/mcp251x.c

@@ -601,7 +601,7 @@ static int mcp251x_do_set_bittiming(struct net_device *net)
 			  (bt->prop_seg - 1));
 	mcp251x_write_bits(spi, CNF3, CNF3_PHSEG2_MASK,
 			   (bt->phase_seg2 - 1));
-	dev_info(&spi->dev, "CNF: 0x%02x 0x%02x 0x%02x\n",
+	dev_dbg(&spi->dev, "CNF: 0x%02x 0x%02x 0x%02x\n",
 		mcp251x_read_reg(spi, CNF1),
 		mcp251x_read_reg(spi, CNF2),
 		mcp251x_read_reg(spi, CNF3));
@@ -1155,8 +1155,6 @@ static int mcp251x_can_probe(struct spi_device *spi)
 
 	devm_can_led_init(net);
 
-	dev_info(&spi->dev, "probed\n");
-
 	return ret;
 
 error_probe:
@@ -1197,9 +1195,7 @@ static int mcp251x_can_remove(struct spi_device *spi)
 	return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
-
-static int mcp251x_can_suspend(struct device *dev)
+static int __maybe_unused mcp251x_can_suspend(struct device *dev)
 {
 	struct spi_device *spi = to_spi_device(dev);
 	struct mcp251x_priv *priv = spi_get_drvdata(spi);
@@ -1229,7 +1225,7 @@ static int mcp251x_can_suspend(struct device *dev)
 	return 0;
 }
 
-static int mcp251x_can_resume(struct device *dev)
+static int __maybe_unused mcp251x_can_resume(struct device *dev)
 {
 	struct spi_device *spi = to_spi_device(dev);
 	struct mcp251x_priv *priv = spi_get_drvdata(spi);
@@ -1249,7 +1245,6 @@ static int mcp251x_can_resume(struct device *dev)
 	enable_irq(spi->irq);
 	return 0;
 }
-#endif
 
 static SIMPLE_DEV_PM_OPS(mcp251x_can_pm_ops, mcp251x_can_suspend,
 	mcp251x_can_resume);

include/linux/can/dev.h

@@ -33,8 +33,9 @@ enum can_mode {
 struct can_priv {
 	struct can_device_stats can_stats;
 
-	struct can_bittiming bittiming;
-	const struct can_bittiming_const *bittiming_const;
+	struct can_bittiming bittiming, data_bittiming;
+	const struct can_bittiming_const *bittiming_const,
+		*data_bittiming_const;
 	struct can_clock clock;
 
 	enum can_state state;
@@ -45,6 +46,7 @@ struct can_priv {
 	struct timer_list restart_timer;
 
 	int (*do_set_bittiming)(struct net_device *dev);
+	int (*do_set_data_bittiming)(struct net_device *dev);
 	int (*do_set_mode)(struct net_device *dev, enum can_mode mode);
 	int (*do_get_state)(const struct net_device *dev,
 			    enum can_state *state);
@@ -111,6 +113,7 @@ struct can_priv *safe_candev_priv(struct net_device *dev);
 
 int open_candev(struct net_device *dev);
 void close_candev(struct net_device *dev);
+int can_change_mtu(struct net_device *dev, int new_mtu);
 
 int register_candev(struct net_device *dev);
 void unregister_candev(struct net_device *dev);

include/uapi/linux/can/netlink.h

@@ -96,6 +96,7 @@ struct can_ctrlmode {
 #define CAN_CTRLMODE_3_SAMPLES		0x04	/* Triple sampling mode */
 #define CAN_CTRLMODE_ONE_SHOT		0x08	/* One-Shot mode */
 #define CAN_CTRLMODE_BERR_REPORTING	0x10	/* Bus-error reporting */
+#define CAN_CTRLMODE_FD			0x20	/* CAN FD mode */
 
 /*
  * CAN device statistics
@@ -122,6 +123,8 @@ enum {
 	IFLA_CAN_RESTART_MS,
 	IFLA_CAN_RESTART,
 	IFLA_CAN_BERR_COUNTER,
+	IFLA_CAN_DATA_BITTIMING,
+	IFLA_CAN_DATA_BITTIMING_CONST,
 	__IFLA_CAN_MAX
 };