Merge branch 'linus' into tracing/hw-breakpoints

Conflicts:
	arch/x86/Kconfig
	arch/x86/kernel/traps.c
	arch/x86/power/cpu.c
	arch/x86/power/cpu_32.c
	kernel/Makefile

Semantic conflict:
	arch/x86/kernel/hw_breakpoint.c

Merge reason: Resolve the conflicts, move from put_cpu_no_sched() to
              put_cpu() in arch/x86/kernel/hw_breakpoint.c.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 151 insertions, 141 deletions

diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
index 03e1926f40b..c15878e8815 100644
--- a/drivers/scsi/fcoe/fcoe.c
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -54,7 +54,6 @@ MODULE_LICENSE("GPL v2");
 /* fcoe host list */
 LIST_HEAD(fcoe_hostlist);
 DEFINE_RWLOCK(fcoe_hostlist_lock);
-DEFINE_TIMER(fcoe_timer, NULL, 0, 0);
 DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
 
 /* Function Prototypes */
@@ -71,7 +70,7 @@ static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
 static int fcoe_hostlist_add(const struct fc_lport *);
 static int fcoe_hostlist_remove(const struct fc_lport *);
 
-static int fcoe_check_wait_queue(struct fc_lport *);
+static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *);
 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
 static void fcoe_dev_setup(void);
 static void fcoe_dev_cleanup(void);
@@ -136,6 +135,58 @@ static struct scsi_host_template fcoe_shost_template = {
 };
 
 /**
+ * fcoe_fip_recv - handle a received FIP frame.
+ * @skb: the receive skb
+ * @dev: associated &net_device
+ * @ptype: the &packet_type structure which was used to register this handler.
+ * @orig_dev: original receive &net_device, in case @dev is a bond.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
+			 struct packet_type *ptype,
+			 struct net_device *orig_dev)
+{
+	struct fcoe_softc *fc;
+
+	fc = container_of(ptype, struct fcoe_softc, fip_packet_type);
+	fcoe_ctlr_recv(&fc->ctlr, skb);
+	return 0;
+}
+
+/**
+ * fcoe_fip_send() - send an Ethernet-encapsulated FIP frame.
+ * @fip: FCoE controller.
+ * @skb: FIP Packet.
+ */
+static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+	skb->dev = fcoe_from_ctlr(fip)->real_dev;
+	dev_queue_xmit(skb);
+}
+
+/**
+ * fcoe_update_src_mac() - Update Ethernet MAC filters.
+ * @fip: FCoE controller.
+ * @old: Unicast MAC address to delete if the MAC is non-zero.
+ * @new: Unicast MAC address to add.
+ *
+ * Remove any previously-set unicast MAC filter.
+ * Add secondary FCoE MAC address filter for our OUI.
+ */
+static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new)
+{
+	struct fcoe_softc *fc;
+
+	fc = fcoe_from_ctlr(fip);
+	rtnl_lock();
+	if (!is_zero_ether_addr(old))
+		dev_unicast_delete(fc->real_dev, old);
+	dev_unicast_add(fc->real_dev, new);
+	rtnl_unlock();
+}
+
+/**
  * fcoe_lport_config() - sets up the fc_lport
  * @lp: ptr to the fc_lport
  *
@@ -146,6 +197,7 @@ static int fcoe_lport_config(struct fc_lport *lp)
 	lp->link_up = 0;
 	lp->qfull = 0;
 	lp->max_retry_count = 3;
+	lp->max_rport_retry_count = 3;
 	lp->e_d_tov = 2 * 1000;	/* FC-FS default */
 	lp->r_a_tov = 2 * 2 * 1000;
 	lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
@@ -167,6 +219,42 @@ static int fcoe_lport_config(struct fc_lport *lp)
 }
 
 /**
+ * fcoe_netdev_cleanup() - clean up netdev configurations
+ * @fc: ptr to the fcoe_softc
+ */
+void fcoe_netdev_cleanup(struct fcoe_softc *fc)
+{
+	u8 flogi_maddr[ETH_ALEN];
+
+	/* Don't listen for Ethernet packets anymore */
+	dev_remove_pack(&fc->fcoe_packet_type);
+	dev_remove_pack(&fc->fip_packet_type);
+
+	/* Delete secondary MAC addresses */
+	rtnl_lock();
+	memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+	dev_unicast_delete(fc->real_dev, flogi_maddr);
+	if (!is_zero_ether_addr(fc->ctlr.data_src_addr))
+		dev_unicast_delete(fc->real_dev, fc->ctlr.data_src_addr);
+	if (fc->ctlr.spma)
+		dev_unicast_delete(fc->real_dev, fc->ctlr.ctl_src_addr);
+	dev_mc_delete(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
+	rtnl_unlock();
+}
+
+/**
+ * fcoe_queue_timer() - fcoe queue timer
+ * @lp: the fc_lport pointer
+ *
+ * Calls fcoe_check_wait_queue on timeout
+ *
+ */
+static void fcoe_queue_timer(ulong lp)
+{
+	fcoe_check_wait_queue((struct fc_lport *)lp, NULL);
+}
+
+/**
  * fcoe_netdev_config() - Set up netdev for SW FCoE
  * @lp : ptr to the fc_lport
  * @netdev : ptr to the associated netdevice struct
@@ -181,6 +269,7 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 	u64 wwnn, wwpn;
 	struct fcoe_softc *fc;
 	u8 flogi_maddr[ETH_ALEN];
+	struct netdev_hw_addr *ha;
 
 	/* Setup lport private data to point to fcoe softc */
 	fc = lport_priv(lp);
@@ -236,10 +325,25 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 	}
 	skb_queue_head_init(&fc->fcoe_pending_queue);
 	fc->fcoe_pending_queue_active = 0;
+	setup_timer(&fc->timer, fcoe_queue_timer, (unsigned long)lp);
+
+	/* look for SAN MAC address, if multiple SAN MACs exist, only
+	 * use the first one for SPMA */
+	rcu_read_lock();
+	for_each_dev_addr(netdev, ha) {
+		if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
+		    (is_valid_ether_addr(fc->ctlr.ctl_src_addr))) {
+			memcpy(fc->ctlr.ctl_src_addr, ha->addr, ETH_ALEN);
+			fc->ctlr.spma = 1;
+			break;
+		}
+	}
+	rcu_read_unlock();
 
 	/* setup Source Mac Address */
-	memcpy(fc->ctlr.ctl_src_addr, fc->real_dev->dev_addr,
-	       fc->real_dev->addr_len);
+	if (!fc->ctlr.spma)
+		memcpy(fc->ctlr.ctl_src_addr, fc->real_dev->dev_addr,
+		       fc->real_dev->addr_len);
 
 	wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
 	fc_set_wwnn(lp, wwnn);
@@ -254,7 +358,9 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 	 */
 	rtnl_lock();
 	memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
-	dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
+	dev_unicast_add(fc->real_dev, flogi_maddr);
+	if (fc->ctlr.spma)
+		dev_unicast_add(fc->real_dev, fc->ctlr.ctl_src_addr);
 	dev_mc_add(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
 	rtnl_unlock();
 
@@ -267,6 +373,11 @@ static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
 	fc->fcoe_packet_type.dev = fc->real_dev;
 	dev_add_pack(&fc->fcoe_packet_type);
 
+	fc->fip_packet_type.func = fcoe_fip_recv;
+	fc->fip_packet_type.type = htons(ETH_P_FIP);
+	fc->fip_packet_type.dev = fc->real_dev;
+	dev_add_pack(&fc->fip_packet_type);
+
 	return 0;
 }
 
@@ -334,7 +445,6 @@ static int fcoe_if_destroy(struct net_device *netdev)
 {
 	struct fc_lport *lp = NULL;
 	struct fcoe_softc *fc;
-	u8 flogi_maddr[ETH_ALEN];
 
 	BUG_ON(!netdev);
 
@@ -353,9 +463,10 @@ static int fcoe_if_destroy(struct net_device *netdev)
 	/* Remove the instance from fcoe's list */
 	fcoe_hostlist_remove(lp);
 
-	/* Don't listen for Ethernet packets anymore */
-	dev_remove_pack(&fc->fcoe_packet_type);
-	dev_remove_pack(&fc->fip_packet_type);
+	/* clean up netdev configurations */
+	fcoe_netdev_cleanup(fc);
+
+	/* tear-down the FCoE controller */
 	fcoe_ctlr_destroy(&fc->ctlr);
 
 	/* Cleanup the fc_lport */
@@ -370,22 +481,15 @@ static int fcoe_if_destroy(struct net_device *netdev)
 	if (lp->emp)
 		fc_exch_mgr_free(lp->emp);
 
-	/* Delete secondary MAC addresses */
-	rtnl_lock();
-	memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
-	dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
-	if (!is_zero_ether_addr(fc->ctlr.data_src_addr))
-		dev_unicast_delete(fc->real_dev,
-				   fc->ctlr.data_src_addr, ETH_ALEN);
-	dev_mc_delete(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
-	rtnl_unlock();
-
 	/* Free the per-CPU receive threads */
 	fcoe_percpu_clean(lp);
 
 	/* Free existing skbs */
 	fcoe_clean_pending_queue(lp);
 
+	/* Stop the timer */
+	del_timer_sync(&fc->timer);
+
 	/* Free memory used by statistical counters */
 	fc_lport_free_stats(lp);
 
@@ -439,58 +543,6 @@ static struct libfc_function_template fcoe_libfc_fcn_templ = {
 };
 
 /**
- * fcoe_fip_recv - handle a received FIP frame.
- * @skb: the receive skb
- * @dev: associated &net_device
- * @ptype: the &packet_type structure which was used to register this handler.
- * @orig_dev: original receive &net_device, in case @dev is a bond.
- *
- * Returns: 0 for success
- */
-static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
-			 struct packet_type *ptype,
-			 struct net_device *orig_dev)
-{
-	struct fcoe_softc *fc;
-
-	fc = container_of(ptype, struct fcoe_softc, fip_packet_type);
-	fcoe_ctlr_recv(&fc->ctlr, skb);
-	return 0;
-}
-
-/**
- * fcoe_fip_send() - send an Ethernet-encapsulated FIP frame.
- * @fip: FCoE controller.
- * @skb: FIP Packet.
- */
-static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
-{
-	skb->dev = fcoe_from_ctlr(fip)->real_dev;
-	dev_queue_xmit(skb);
-}
-
-/**
- * fcoe_update_src_mac() - Update Ethernet MAC filters.
- * @fip: FCoE controller.
- * @old: Unicast MAC address to delete if the MAC is non-zero.
- * @new: Unicast MAC address to add.
- *
- * Remove any previously-set unicast MAC filter.
- * Add secondary FCoE MAC address filter for our OUI.
- */
-static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new)
-{
-	struct fcoe_softc *fc;
-
-	fc = fcoe_from_ctlr(fip);
-	rtnl_lock();
-	if (!is_zero_ether_addr(old))
-		dev_unicast_delete(fc->real_dev, old, ETH_ALEN);
-	dev_unicast_add(fc->real_dev, new, ETH_ALEN);
-	rtnl_unlock();
-}
-
-/**
  * fcoe_if_create() - this function creates the fcoe interface
  * @netdev: pointer the associated netdevice
  *
@@ -531,13 +583,6 @@ static int fcoe_if_create(struct net_device *netdev)
 		goto out_host_put;
 	}
 
-	/* configure lport network properties */
-	rc = fcoe_netdev_config(lp, netdev);
-	if (rc) {
-		FC_DBG("Could not configure netdev for lport\n");
-		goto out_host_put;
-	}
-
 	/*
 	 * Initialize FIP.
 	 */
@@ -545,23 +590,25 @@ static int fcoe_if_create(struct net_device *netdev)
 	fc->ctlr.send = fcoe_fip_send;
 	fc->ctlr.update_mac = fcoe_update_src_mac;
 
-	fc->fip_packet_type.func = fcoe_fip_recv;
-	fc->fip_packet_type.type = htons(ETH_P_FIP);
-	fc->fip_packet_type.dev = fc->real_dev;
-	dev_add_pack(&fc->fip_packet_type);
+	/* configure lport network properties */
+	rc = fcoe_netdev_config(lp, netdev);
+	if (rc) {
+		FC_DBG("Could not configure netdev for the interface\n");
+		goto out_netdev_cleanup;
+	}
 
 	/* configure lport scsi host properties */
 	rc = fcoe_shost_config(lp, shost, &netdev->dev);
 	if (rc) {
 		FC_DBG("Could not configure shost for lport\n");
-		goto out_host_put;
+		goto out_netdev_cleanup;
 	}
 
 	/* lport exch manager allocation */
 	rc = fcoe_em_config(lp);
 	if (rc) {
 		FC_DBG("Could not configure em for lport\n");
-		goto out_host_put;
+		goto out_netdev_cleanup;
 	}
 
 	/* Initialize the library */
@@ -587,6 +634,8 @@ static int fcoe_if_create(struct net_device *netdev)
 
 out_lp_destroy:
 	fc_exch_mgr_free(lp->emp); /* Free the EM */
+out_netdev_cleanup:
+	fcoe_netdev_cleanup(fc);
 out_host_put:
 	scsi_host_put(lp->host);
 	return rc;
@@ -988,7 +1037,7 @@ u32 fcoe_fc_crc(struct fc_frame *fp)
  */
 int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 {
-	int wlen, rc = 0;
+	int wlen;
 	u32 crc;
 	struct ethhdr *eh;
 	struct fcoe_crc_eof *cp;
@@ -1021,8 +1070,7 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 	sof = fr_sof(fp);
 	eof = fr_eof(fp);
 
-	elen = (fc->real_dev->priv_flags & IFF_802_1Q_VLAN) ?
-		sizeof(struct vlan_ethhdr) : sizeof(struct ethhdr);
+	elen = sizeof(struct ethhdr);
 	hlen = sizeof(struct fcoe_hdr);
 	tlen = sizeof(struct fcoe_crc_eof);
 	wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
@@ -1107,18 +1155,9 @@ int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
 	/* send down to lld */
 	fr_dev(fp) = lp;
 	if (fc->fcoe_pending_queue.qlen)
-		rc = fcoe_check_wait_queue(lp);
-
-	if (rc == 0)
-		rc = fcoe_start_io(skb);
-
-	if (rc) {
-		spin_lock_bh(&fc->fcoe_pending_queue.lock);
-		__skb_queue_tail(&fc->fcoe_pending_queue, skb);
-		spin_unlock_bh(&fc->fcoe_pending_queue.lock);
-		if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
-			lp->qfull = 1;
-	}
+		fcoe_check_wait_queue(lp, skb);
+	else if (fcoe_start_io(skb))
+		fcoe_check_wait_queue(lp, skb);
 
 	return 0;
 }
@@ -1268,32 +1307,6 @@ int fcoe_percpu_receive_thread(void *arg)
 }
 
 /**
- * fcoe_watchdog() - fcoe timer callback
- * @vp:
- *
- * This checks the pending queue length for fcoe and set lport qfull
- * if the FCOE_MAX_QUEUE_DEPTH is reached. This is done for all fc_lport on the
- * fcoe_hostlist.
- *
- * Returns: 0 for success
- */
-void fcoe_watchdog(ulong vp)
-{
-	struct fcoe_softc *fc;
-
-	read_lock(&fcoe_hostlist_lock);
-	list_for_each_entry(fc, &fcoe_hostlist, list) {
-		if (fc->ctlr.lp)
-			fcoe_check_wait_queue(fc->ctlr.lp);
-	}
-	read_unlock(&fcoe_hostlist_lock);
-
-	fcoe_timer.expires = jiffies + (1 * HZ);
-	add_timer(&fcoe_timer);
-}
-
-
-/**
  * fcoe_check_wait_queue() - attempt to clear the transmit backlog
  * @lp: the fc_lport
  *
@@ -1305,16 +1318,17 @@ void fcoe_watchdog(ulong vp)
  * The wait_queue is used when the skb transmit fails. skb will go
  * in the wait_queue which will be emptied by the timer function or
  * by the next skb transmit.
- *
- * Returns: 0 for success
  */
-static int fcoe_check_wait_queue(struct fc_lport *lp)
+static void fcoe_check_wait_queue(struct fc_lport *lp, struct sk_buff *skb)
 {
 	struct fcoe_softc *fc = lport_priv(lp);
-	struct sk_buff *skb;
-	int rc = -1;
+	int rc;
 
 	spin_lock_bh(&fc->fcoe_pending_queue.lock);
+
+	if (skb)
+		__skb_queue_tail(&fc->fcoe_pending_queue, skb);
+
 	if (fc->fcoe_pending_queue_active)
 		goto out;
 	fc->fcoe_pending_queue_active = 1;
@@ -1340,23 +1354,26 @@ static int fcoe_check_wait_queue(struct fc_lport *lp)
 
 	if (fc->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
 		lp->qfull = 0;
+	if (fc->fcoe_pending_queue.qlen && !timer_pending(&fc->timer))
+		mod_timer(&fc->timer, jiffies + 2);
 	fc->fcoe_pending_queue_active = 0;
-	rc = fc->fcoe_pending_queue.qlen;
 out:
+	if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
+		lp->qfull = 1;
 	spin_unlock_bh(&fc->fcoe_pending_queue.lock);
-	return rc;
+	return;
 }
 
 /**
  * fcoe_dev_setup() - setup link change notification interface
  */
-static void fcoe_dev_setup()
+static void fcoe_dev_setup(void)
 {
 	register_netdevice_notifier(&fcoe_notifier);
 }
 
 /**
- * fcoe_dev_setup() - cleanup link change notification interface
+ * fcoe_dev_cleanup() - cleanup link change notification interface
  */
 static void fcoe_dev_cleanup(void)
 {
@@ -1815,10 +1832,6 @@ static int __init fcoe_init(void)
 	/* Setup link change notification */
 	fcoe_dev_setup();
 
-	setup_timer(&fcoe_timer, fcoe_watchdog, 0);
-
-	mod_timer(&fcoe_timer, jiffies + (10 * HZ));
-
 	fcoe_if_init();
 
 	return 0;
@@ -1844,9 +1857,6 @@ static void __exit fcoe_exit(void)
 
 	fcoe_dev_cleanup();
 
-	/* Stop the timer */
-	del_timer_sync(&fcoe_timer);
-
 	/* releases the associated fcoe hosts */
 	list_for_each_entry_safe(fc, tmp, &fcoe_hostlist, list)
 		fcoe_if_destroy(fc->real_dev);