Merge branch 'perf/core' into perf/uprobes

Merge in latest upstream (and the latest perf development tree),
to prepare for tooling changes, and also to pick up v3.4 MM
changes that the uprobes code needs to take care of.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

1 files changed, 56 insertions, 4 deletions

diff --git a/drivers/scsi/scsi_transport_sas.c b/drivers/scsi/scsi_transport_sas.c
index 9d9330ae421..f7565fc4f0e 100644
--- a/drivers/scsi/scsi_transport_sas.c
+++ b/drivers/scsi/scsi_transport_sas.c
@@ -615,6 +615,7 @@ do_sas_phy_reset(struct device *dev, size_t count, int hard_reset)
 	error = i->f->phy_reset(phy, hard_reset);
 	if (error)
 		return error;
+	phy->enabled = 1;
 	return count;
 };
 
@@ -652,9 +653,21 @@ sas_phy_linkerror_attr(running_disparity_error_count);
 sas_phy_linkerror_attr(loss_of_dword_sync_count);
 sas_phy_linkerror_attr(phy_reset_problem_count);
 
+static int sas_phy_setup(struct transport_container *tc, struct device *dev,
+			 struct device *cdev)
+{
+	struct sas_phy *phy = dev_to_phy(dev);
+	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
+	struct sas_internal *i = to_sas_internal(shost->transportt);
+
+	if (i->f->phy_setup)
+		i->f->phy_setup(phy);
+
+	return 0;
+}
 
 static DECLARE_TRANSPORT_CLASS(sas_phy_class,
-		"sas_phy", NULL, NULL, NULL);
+		"sas_phy", sas_phy_setup, NULL, NULL);
 
 static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 {
@@ -678,7 +691,11 @@ static int sas_phy_match(struct attribute_container *cont, struct device *dev)
 static void sas_phy_release(struct device *dev)
 {
 	struct sas_phy *phy = dev_to_phy(dev);
+	struct Scsi_Host *shost = dev_to_shost(phy->dev.parent);
+	struct sas_internal *i = to_sas_internal(shost->transportt);
 
+	if (i->f->phy_release)
+		i->f->phy_release(phy);
 	put_device(dev->parent);
 	kfree(phy);
 }
@@ -1044,6 +1061,29 @@ int scsi_is_sas_port(const struct device *dev)
 EXPORT_SYMBOL(scsi_is_sas_port);
 
 /**
+ * sas_port_get_phy - try to take a reference on a port member
+ * @port: port to check
+ */
+struct sas_phy *sas_port_get_phy(struct sas_port *port)
+{
+	struct sas_phy *phy;
+
+	mutex_lock(&port->phy_list_mutex);
+	if (list_empty(&port->phy_list))
+		phy = NULL;
+	else {
+		struct list_head *ent = port->phy_list.next;
+
+		phy = list_entry(ent, typeof(*phy), port_siblings);
+		get_device(&phy->dev);
+	}
+	mutex_unlock(&port->phy_list_mutex);
+
+	return phy;
+}
+EXPORT_SYMBOL(sas_port_get_phy);
+
+/**
  * sas_port_add_phy - add another phy to a port to form a wide port
  * @port:	port to add the phy to
  * @phy:	phy to add
@@ -1603,6 +1643,20 @@ sas_rphy_delete(struct sas_rphy *rphy)
 EXPORT_SYMBOL(sas_rphy_delete);
 
 /**
+ * sas_rphy_unlink  -  unlink SAS remote PHY
+ * @rphy:	SAS remote phy to unlink from its parent port
+ *
+ * Removes port reference to an rphy
+ */
+void sas_rphy_unlink(struct sas_rphy *rphy)
+{
+	struct sas_port *parent = dev_to_sas_port(rphy->dev.parent);
+
+	parent->rphy = NULL;
+}
+EXPORT_SYMBOL(sas_rphy_unlink);
+
+/**
  * sas_rphy_remove  -  remove SAS remote PHY
  * @rphy:	SAS remote phy to remove
  *
@@ -1612,7 +1666,6 @@ void
 sas_rphy_remove(struct sas_rphy *rphy)
 {
 	struct device *dev = &rphy->dev;
-	struct sas_port *parent = dev_to_sas_port(dev->parent);
 
 	switch (rphy->identify.device_type) {
 	case SAS_END_DEVICE:
@@ -1626,10 +1679,9 @@ sas_rphy_remove(struct sas_rphy *rphy)
 		break;
 	}
 
+	sas_rphy_unlink(rphy);
 	transport_remove_device(dev);
 	device_del(dev);
-
-	parent->rphy = NULL;
 }
 EXPORT_SYMBOL(sas_rphy_remove);