Merge tag 'char-misc-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc

Pull char/misc driver updates from Greg KH:
 "Here is the big char/misc driver update for 4.4-rc1.  Lots of
  different driver and subsystem updates, hwtracing being the largest
  with the addition of some new platforms that are now supported.  Full
  details in the shortlog.

  All of these have been in linux-next for a long time with no reported
  issues"

* tag 'char-misc-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (181 commits)
  fpga: socfpga: Fix check of return value of devm_request_irq
  lkdtm: fix ACCESS_USERSPACE test
  mcb: Destroy IDA on module unload
  mcb: Do not return zero on error path in mcb_pci_probe()
  mei: bus: set the device name before running fixup
  mei: bus: use correct lock ordering
  mei: Fix debugfs filename in error output
  char: ipmi: ipmi_ssif: Replace timeval with timespec64
  fpga: zynq-fpga: Fix issue with drvdata being overwritten.
  fpga manager: remove unnecessary null pointer checks
  fpga manager: ensure lifetime with of_fpga_mgr_get
  fpga: zynq-fpga: Change fw format to handle bin instead of bit.
  fpga: zynq-fpga: Fix unbalanced clock handling
  misc: sram: partition base address belongs to __iomem space
  coresight: etm3x: adding documentation for sysFS's cpu interface
  vme: 8-bit status/id takes 256 values, not 255
  fpga manager: Adding FPGA Manager support for Xilinx Zynq 7000
  ARM: zynq: dt: Updated devicetree for Zynq 7000 platform.
  ARM: dt: fpga: Added binding docs for Xilinx Zynq FPGA manager.
  ver_linux: proc/modules, limit text processing to 'sed'
  ...

1 files changed, 154 insertions, 64 deletions

diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index eef1c6b46ad8..0b05aa938799 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -91,7 +91,7 @@ out:
  * __mei_cl_recv - internal client receive (read)
  *
  * @cl: host client
- * @buf: buffer to send
+ * @buf: buffer to receive
  * @length: buffer length
  *
  * Return: read size in bytes of < 0 on error
@@ -165,7 +165,7 @@ out:
 }
 
 /**
- * mei_cl_send - me device send  (write)
+ * mei_cldev_send - me device send  (write)
  *
  * @cldev: me client device
  * @buf: buffer to send
@@ -173,7 +173,7 @@ out:
  *
  * Return: written size in bytes or < 0 on error
  */
-ssize_t mei_cl_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
+ssize_t mei_cldev_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
 {
 	struct mei_cl *cl = cldev->cl;
 
@@ -182,18 +182,18 @@ ssize_t mei_cl_send(struct mei_cl_device *cldev, u8 *buf, size_t length)
 
 	return __mei_cl_send(cl, buf, length, 1);
 }
-EXPORT_SYMBOL_GPL(mei_cl_send);
+EXPORT_SYMBOL_GPL(mei_cldev_send);
 
 /**
- * mei_cl_recv - client receive (read)
+ * mei_cldev_recv - client receive (read)
  *
  * @cldev: me client device
- * @buf: buffer to send
+ * @buf: buffer to receive
  * @length: buffer length
  *
  * Return: read size in bytes of < 0 on error
  */
-ssize_t mei_cl_recv(struct mei_cl_device *cldev, u8 *buf, size_t length)
+ssize_t mei_cldev_recv(struct mei_cl_device *cldev, u8 *buf, size_t length)
 {
 	struct mei_cl *cl = cldev->cl;
 
@@ -202,15 +202,15 @@ ssize_t mei_cl_recv(struct mei_cl_device *cldev, u8 *buf, size_t length)
 
 	return __mei_cl_recv(cl, buf, length);
 }
-EXPORT_SYMBOL_GPL(mei_cl_recv);
+EXPORT_SYMBOL_GPL(mei_cldev_recv);
 
 /**
- * mei_bus_event_work  - dispatch rx event for a bus device
+ * mei_cl_bus_event_work  - dispatch rx event for a bus device
  *    and schedule new work
  *
  * @work: work
  */
-static void mei_bus_event_work(struct work_struct *work)
+static void mei_cl_bus_event_work(struct work_struct *work)
 {
 	struct mei_cl_device *cldev;
 
@@ -272,7 +272,7 @@ void mei_cl_bus_rx_event(struct mei_cl *cl)
 }
 
 /**
- * mei_cl_register_event_cb - register event callback
+ * mei_cldev_register_event_cb - register event callback
  *
  * @cldev: me client devices
  * @event_cb: callback function
@@ -283,9 +283,9 @@ void mei_cl_bus_rx_event(struct mei_cl *cl)
  *         -EALREADY if an callback is already registered
  *         <0 on other errors
  */
-int mei_cl_register_event_cb(struct mei_cl_device *cldev,
-			  unsigned long events_mask,
-			  mei_cl_event_cb_t event_cb, void *context)
+int mei_cldev_register_event_cb(struct mei_cl_device *cldev,
+				unsigned long events_mask,
+				mei_cldev_event_cb_t event_cb, void *context)
 {
 	int ret;
 
@@ -296,7 +296,7 @@ int mei_cl_register_event_cb(struct mei_cl_device *cldev,
 	cldev->events_mask = events_mask;
 	cldev->event_cb = event_cb;
 	cldev->event_context = context;
-	INIT_WORK(&cldev->event_work, mei_bus_event_work);
+	INIT_WORK(&cldev->event_work, mei_cl_bus_event_work);
 
 	if (cldev->events_mask & BIT(MEI_CL_EVENT_RX)) {
 		ret = mei_cl_read_start(cldev->cl, 0, NULL);
@@ -314,42 +314,81 @@ int mei_cl_register_event_cb(struct mei_cl_device *cldev,
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(mei_cl_register_event_cb);
+EXPORT_SYMBOL_GPL(mei_cldev_register_event_cb);
 
 /**
- * mei_cl_get_drvdata - driver data getter
+ * mei_cldev_get_drvdata - driver data getter
  *
  * @cldev: mei client device
  *
  * Return: driver private data
  */
-void *mei_cl_get_drvdata(const struct mei_cl_device *cldev)
+void *mei_cldev_get_drvdata(const struct mei_cl_device *cldev)
 {
 	return dev_get_drvdata(&cldev->dev);
 }
-EXPORT_SYMBOL_GPL(mei_cl_get_drvdata);
+EXPORT_SYMBOL_GPL(mei_cldev_get_drvdata);
 
 /**
- * mei_cl_set_drvdata - driver data setter
+ * mei_cldev_set_drvdata - driver data setter
  *
  * @cldev: mei client device
  * @data: data to store
  */
-void mei_cl_set_drvdata(struct mei_cl_device *cldev, void *data)
+void mei_cldev_set_drvdata(struct mei_cl_device *cldev, void *data)
 {
 	dev_set_drvdata(&cldev->dev, data);
 }
-EXPORT_SYMBOL_GPL(mei_cl_set_drvdata);
+EXPORT_SYMBOL_GPL(mei_cldev_set_drvdata);
+
+/**
+ * mei_cldev_uuid - return uuid of the underlying me client
+ *
+ * @cldev: mei client device
+ *
+ * Return: me client uuid
+ */
+const uuid_le *mei_cldev_uuid(const struct mei_cl_device *cldev)
+{
+	return mei_me_cl_uuid(cldev->me_cl);
+}
+EXPORT_SYMBOL_GPL(mei_cldev_uuid);
+
+/**
+ * mei_cldev_ver - return protocol version of the underlying me client
+ *
+ * @cldev: mei client device
+ *
+ * Return: me client protocol version
+ */
+u8 mei_cldev_ver(const struct mei_cl_device *cldev)
+{
+	return mei_me_cl_ver(cldev->me_cl);
+}
+EXPORT_SYMBOL_GPL(mei_cldev_ver);
+
+/**
+ * mei_cldev_enabled - check whether the device is enabled
+ *
+ * @cldev: mei client device
+ *
+ * Return: true if me client is initialized and connected
+ */
+bool mei_cldev_enabled(struct mei_cl_device *cldev)
+{
+	return cldev->cl && mei_cl_is_connected(cldev->cl);
+}
+EXPORT_SYMBOL_GPL(mei_cldev_enabled);
 
 /**
- * mei_cl_enable_device - enable me client device
+ * mei_cldev_enable_device - enable me client device
  *     create connection with me client
  *
  * @cldev: me client device
  *
  * Return: 0 on success and < 0 on error
  */
-int mei_cl_enable_device(struct mei_cl_device *cldev)
+int mei_cldev_enable(struct mei_cl_device *cldev)
 {
 	struct mei_device *bus = cldev->bus;
 	struct mei_cl *cl;
@@ -389,17 +428,17 @@ out:
 
 	return ret;
 }
-EXPORT_SYMBOL_GPL(mei_cl_enable_device);
+EXPORT_SYMBOL_GPL(mei_cldev_enable);
 
 /**
- * mei_cl_disable_device - disable me client device
+ * mei_cldev_disable - disable me client device
  *     disconnect form the me client
  *
  * @cldev: me client device
  *
  * Return: 0 on success and < 0 on error
  */
-int mei_cl_disable_device(struct mei_cl_device *cldev)
+int mei_cldev_disable(struct mei_cl_device *cldev)
 {
 	struct mei_device *bus;
 	struct mei_cl *cl;
@@ -437,7 +476,7 @@ out:
 	mutex_unlock(&bus->device_lock);
 	return err;
 }
-EXPORT_SYMBOL_GPL(mei_cl_disable_device);
+EXPORT_SYMBOL_GPL(mei_cldev_disable);
 
 /**
  * mei_cl_device_find - find matching entry in the driver id table
@@ -453,17 +492,26 @@ struct mei_cl_device_id *mei_cl_device_find(struct mei_cl_device *cldev,
 {
 	const struct mei_cl_device_id *id;
 	const uuid_le *uuid;
+	u8 version;
+	bool match;
 
 	uuid = mei_me_cl_uuid(cldev->me_cl);
+	version = mei_me_cl_ver(cldev->me_cl);
 
 	id = cldrv->id_table;
 	while (uuid_le_cmp(NULL_UUID_LE, id->uuid)) {
 		if (!uuid_le_cmp(*uuid, id->uuid)) {
+			match = true;
 
-			if (!cldev->name[0])
-				return id;
+			if (cldev->name[0])
+				if (strncmp(cldev->name, id->name,
+					    sizeof(id->name)))
+					match = false;
 
-			if (!strncmp(cldev->name, id->name, sizeof(id->name)))
+			if (id->version != MEI_CL_VERSION_ANY)
+				if (id->version != version)
+					match = false;
+			if (match)
 				return id;
 		}
 
@@ -590,6 +638,19 @@ static ssize_t uuid_show(struct device *dev, struct device_attribute *a,
 }
 static DEVICE_ATTR_RO(uuid);
 
+static ssize_t version_show(struct device *dev, struct device_attribute *a,
+			     char *buf)
+{
+	struct mei_cl_device *cldev = to_mei_cl_device(dev);
+	u8 version = mei_me_cl_ver(cldev->me_cl);
+	size_t len;
+
+	len = snprintf(buf, PAGE_SIZE, "%02X", version);
+
+	return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
+}
+static DEVICE_ATTR_RO(version);
+
 static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
 			     char *buf)
 {
@@ -597,20 +658,19 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *a,
 	const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
 	size_t len;
 
-	len = snprintf(buf, PAGE_SIZE, "mei:%s:" MEI_CL_UUID_FMT ":",
-		cldev->name, MEI_CL_UUID_ARGS(uuid->b));
-
+	len = snprintf(buf, PAGE_SIZE, "mei:%s:%pUl:", cldev->name, uuid);
 	return (len >= PAGE_SIZE) ? (PAGE_SIZE - 1) : len;
 }
 static DEVICE_ATTR_RO(modalias);
 
-static struct attribute *mei_cl_dev_attrs[] = {
+static struct attribute *mei_cldev_attrs[] = {
 	&dev_attr_name.attr,
 	&dev_attr_uuid.attr,
+	&dev_attr_version.attr,
 	&dev_attr_modalias.attr,
 	NULL,
 };
-ATTRIBUTE_GROUPS(mei_cl_dev);
+ATTRIBUTE_GROUPS(mei_cldev);
 
 /**
  * mei_cl_device_uevent - me client bus uevent handler
@@ -624,6 +684,10 @@ static int mei_cl_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 {
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 	const uuid_le *uuid = mei_me_cl_uuid(cldev->me_cl);
+	u8 version = mei_me_cl_ver(cldev->me_cl);
+
+	if (add_uevent_var(env, "MEI_CL_VERSION=%d", version))
+		return -ENOMEM;
 
 	if (add_uevent_var(env, "MEI_CL_UUID=%pUl", uuid))
 		return -ENOMEM;
@@ -631,8 +695,8 @@ static int mei_cl_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 	if (add_uevent_var(env, "MEI_CL_NAME=%s", cldev->name))
 		return -ENOMEM;
 
-	if (add_uevent_var(env, "MODALIAS=mei:%s:" MEI_CL_UUID_FMT ":",
-		cldev->name, MEI_CL_UUID_ARGS(uuid->b)))
+	if (add_uevent_var(env, "MODALIAS=mei:%s:%pUl:%02X:",
+			   cldev->name, uuid, version))
 		return -ENOMEM;
 
 	return 0;
@@ -640,7 +704,7 @@ static int mei_cl_device_uevent(struct device *dev, struct kobj_uevent_env *env)
 
 static struct bus_type mei_cl_bus_type = {
 	.name		= "mei",
-	.dev_groups	= mei_cl_dev_groups,
+	.dev_groups	= mei_cldev_groups,
 	.match		= mei_cl_device_match,
 	.probe		= mei_cl_device_probe,
 	.remove		= mei_cl_device_remove,
@@ -661,7 +725,7 @@ static void mei_dev_bus_put(struct mei_device *bus)
 		put_device(bus->dev);
 }
 
-static void mei_cl_dev_release(struct device *dev)
+static void mei_cl_bus_dev_release(struct device *dev)
 {
 	struct mei_cl_device *cldev = to_mei_cl_device(dev);
 
@@ -674,19 +738,32 @@ static void mei_cl_dev_release(struct device *dev)
 }
 
 static struct device_type mei_cl_device_type = {
-	.release	= mei_cl_dev_release,
+	.release	= mei_cl_bus_dev_release,
 };
 
 /**
- * mei_cl_dev_alloc - initialize and allocate mei client device
+ * mei_cl_bus_set_name - set device name for me client device
+ *
+ * @cldev: me client device
+ */
+static inline void mei_cl_bus_set_name(struct mei_cl_device *cldev)
+{
+	dev_set_name(&cldev->dev, "mei:%s:%pUl:%02X",
+		     cldev->name,
+		     mei_me_cl_uuid(cldev->me_cl),
+		     mei_me_cl_ver(cldev->me_cl));
+}
+
+/**
+ * mei_cl_bus_dev_alloc - initialize and allocate mei client device
  *
  * @bus: mei device
  * @me_cl: me client
  *
  * Return: allocated device structur or NULL on allocation failure
  */
-static struct mei_cl_device *mei_cl_dev_alloc(struct mei_device *bus,
-					      struct mei_me_client *me_cl)
+static struct mei_cl_device *mei_cl_bus_dev_alloc(struct mei_device *bus,
+						  struct mei_me_client *me_cl)
 {
 	struct mei_cl_device *cldev;
 
@@ -700,6 +777,7 @@ static struct mei_cl_device *mei_cl_dev_alloc(struct mei_device *bus,
 	cldev->dev.type   = &mei_cl_device_type;
 	cldev->bus        = mei_dev_bus_get(bus);
 	cldev->me_cl      = mei_me_cl_get(me_cl);
+	mei_cl_bus_set_name(cldev);
 	cldev->is_added   = 0;
 	INIT_LIST_HEAD(&cldev->bus_list);
 
@@ -715,15 +793,15 @@ static struct mei_cl_device *mei_cl_dev_alloc(struct mei_device *bus,
  *
  * Return: true if the device is eligible for enumeration
  */
-static bool mei_cl_dev_setup(struct mei_device *bus,
-			     struct mei_cl_device *cldev)
+static bool mei_cl_bus_dev_setup(struct mei_device *bus,
+				 struct mei_cl_device *cldev)
 {
 	cldev->do_match = 1;
-	mei_cl_dev_fixup(cldev);
+	mei_cl_bus_dev_fixup(cldev);
 
+	/* the device name can change during fix up */
 	if (cldev->do_match)
-		dev_set_name(&cldev->dev, "mei:%s:%pUl",
-			     cldev->name, mei_me_cl_uuid(cldev->me_cl));
+		mei_cl_bus_set_name(cldev);
 
 	return cldev->do_match == 1;
 }
@@ -739,7 +817,9 @@ static int mei_cl_bus_dev_add(struct mei_cl_device *cldev)
 {
 	int ret;
 
-	dev_dbg(cldev->bus->dev, "adding %pUL\n", mei_me_cl_uuid(cldev->me_cl));
+	dev_dbg(cldev->bus->dev, "adding %pUL:%02X\n",
+		mei_me_cl_uuid(cldev->me_cl),
+		mei_me_cl_ver(cldev->me_cl));
 	ret = device_add(&cldev->dev);
 	if (!ret)
 		cldev->is_added = 1;
@@ -762,17 +842,20 @@ static void mei_cl_bus_dev_stop(struct mei_cl_device *cldev)
  * mei_cl_bus_dev_destroy - destroy me client devices object
  *
  * @cldev: me client device
+ *
+ * Locking: called under "dev->cl_bus_lock" lock
  */
 static void mei_cl_bus_dev_destroy(struct mei_cl_device *cldev)
 {
+
+	WARN_ON(!mutex_is_locked(&cldev->bus->cl_bus_lock));
+
 	if (!cldev->is_added)
 		return;
 
 	device_del(&cldev->dev);
 
-	mutex_lock(&cldev->bus->cl_bus_lock);
 	list_del_init(&cldev->bus_list);
-	mutex_unlock(&cldev->bus->cl_bus_lock);
 
 	cldev->is_added = 0;
 	put_device(&cldev->dev);
@@ -798,35 +881,40 @@ void mei_cl_bus_remove_devices(struct mei_device *bus)
 {
 	struct mei_cl_device *cldev, *next;
 
+	mutex_lock(&bus->cl_bus_lock);
 	list_for_each_entry_safe(cldev, next, &bus->device_list, bus_list)
 		mei_cl_bus_remove_device(cldev);
+	mutex_unlock(&bus->cl_bus_lock);
 }
 
 
 /**
- * mei_cl_dev_init - allocate and initializes an mei client devices
+ * mei_cl_bus_dev_init - allocate and initializes an mei client devices
  *     based on me client
  *
  * @bus: mei device
  * @me_cl: me client
+ *
+ * Locking: called under "dev->cl_bus_lock" lock
  */
-static void mei_cl_dev_init(struct mei_device *bus, struct mei_me_client *me_cl)
+static void mei_cl_bus_dev_init(struct mei_device *bus,
+				struct mei_me_client *me_cl)
 {
 	struct mei_cl_device *cldev;
 
+	WARN_ON(!mutex_is_locked(&bus->cl_bus_lock));
+
 	dev_dbg(bus->dev, "initializing %pUl", mei_me_cl_uuid(me_cl));
 
 	if (me_cl->bus_added)
 		return;
 
-	cldev = mei_cl_dev_alloc(bus, me_cl);
+	cldev = mei_cl_bus_dev_alloc(bus, me_cl);
 	if (!cldev)
 		return;
 
-	mutex_lock(&cldev->bus->cl_bus_lock);
 	me_cl->bus_added = true;
 	list_add_tail(&cldev->bus_list, &bus->device_list);
-	mutex_unlock(&cldev->bus->cl_bus_lock);
 
 }
 
@@ -841,12 +929,13 @@ void mei_cl_bus_rescan(struct mei_device *bus)
 	struct mei_cl_device *cldev, *n;
 	struct mei_me_client *me_cl;
 
+	mutex_lock(&bus->cl_bus_lock);
+
 	down_read(&bus->me_clients_rwsem);
 	list_for_each_entry(me_cl, &bus->me_clients, list)
-		mei_cl_dev_init(bus, me_cl);
+		mei_cl_bus_dev_init(bus, me_cl);
 	up_read(&bus->me_clients_rwsem);
 
-	mutex_lock(&bus->cl_bus_lock);
 	list_for_each_entry_safe(cldev, n, &bus->device_list, bus_list) {
 
 		if (!mei_me_cl_is_active(cldev->me_cl)) {
@@ -857,7 +946,7 @@ void mei_cl_bus_rescan(struct mei_device *bus)
 		if (cldev->is_added)
 			continue;
 
-		if (mei_cl_dev_setup(bus, cldev))
+		if (mei_cl_bus_dev_setup(bus, cldev))
 			mei_cl_bus_dev_add(cldev);
 		else {
 			list_del_init(&cldev->bus_list);
@@ -869,7 +958,8 @@ void mei_cl_bus_rescan(struct mei_device *bus)
 	dev_dbg(bus->dev, "rescan end");
 }
 
-int __mei_cl_driver_register(struct mei_cl_driver *cldrv, struct module *owner)
+int __mei_cldev_driver_register(struct mei_cl_driver *cldrv,
+				struct module *owner)
 {
 	int err;
 
@@ -885,15 +975,15 @@ int __mei_cl_driver_register(struct mei_cl_driver *cldrv, struct module *owner)
 
 	return 0;
 }
-EXPORT_SYMBOL_GPL(__mei_cl_driver_register);
+EXPORT_SYMBOL_GPL(__mei_cldev_driver_register);
 
-void mei_cl_driver_unregister(struct mei_cl_driver *cldrv)
+void mei_cldev_driver_unregister(struct mei_cl_driver *cldrv)
 {
 	driver_unregister(&cldrv->driver);
 
 	pr_debug("mei: driver [%s] unregistered\n", cldrv->driver.name);
 }
-EXPORT_SYMBOL_GPL(mei_cl_driver_unregister);
+EXPORT_SYMBOL_GPL(mei_cldev_driver_unregister);
 
 
 int __init mei_cl_bus_init(void)