mei: split amthif client init from end of clients enumeration

The amthif FW client can appear after the end of client enumeration.
Amthif host client initialization is done now at FW client discovery
time.

Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

7 files changed, 15 insertions, 23 deletions

diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c
index de194ef..04525ad 100644
--- a/drivers/misc/mei/amthif.c
+++ b/drivers/misc/mei/amthif.c
@@ -67,6 +67,9 @@ int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl)
 	struct mei_cl *cl = &dev->iamthif_cl;
 	int ret;
 
+	if (mei_cl_is_connected(cl))
+		return 0;
+
 	dev->iamthif_state = MEI_IAMTHIF_IDLE;
 
 	mei_cl_init(cl, dev);
@@ -79,8 +82,6 @@ int mei_amthif_host_init(struct mei_device *dev, struct mei_me_client *me_cl)
 
 	ret = mei_cl_connect(cl, me_cl, NULL);
 
-	dev->iamthif_state = MEI_IAMTHIF_IDLE;
-
 	return ret;
 }
 
diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c
index 951d322..f4cf43b 100644
--- a/drivers/misc/mei/bus.c
+++ b/drivers/misc/mei/bus.c
@@ -981,6 +981,14 @@ void mei_cl_bus_rescan_work(struct work_struct *work)
 {
 	struct mei_device *bus =
 		container_of(work, struct mei_device, bus_rescan_work);
+	struct mei_me_client *me_cl;
+
+	mutex_lock(&bus->device_lock);
+	me_cl = mei_me_cl_by_uuid(bus, &mei_amthif_guid);
+	if (me_cl)
+		mei_amthif_host_init(bus, me_cl);
+	mei_me_cl_put(me_cl);
+	mutex_unlock(&bus->device_lock);
 
 	mei_cl_bus_rescan(bus);
 }
diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c
index 2890669..af6816bc2 100644
--- a/drivers/misc/mei/client.c
+++ b/drivers/misc/mei/client.c
@@ -666,25 +666,12 @@ int mei_cl_unlink(struct mei_cl *cl)
 	return 0;
 }
 
-
-void mei_host_client_init(struct work_struct *work)
+void mei_host_client_init(struct mei_device *dev)
 {
-	struct mei_device *dev =
-		container_of(work, struct mei_device, init_work);
-	struct mei_me_client *me_cl;
-
-	mutex_lock(&dev->device_lock);
-
-	me_cl = mei_me_cl_by_uuid(dev, &mei_amthif_guid);
-	if (me_cl)
-		mei_amthif_host_init(dev, me_cl);
-	mei_me_cl_put(me_cl);
-
 	dev->dev_state = MEI_DEV_ENABLED;
 	dev->reset_count = 0;
-	mutex_unlock(&dev->device_lock);
 
-	mei_cl_bus_rescan(dev);
+	schedule_work(&dev->bus_rescan_work);
 
 	pm_runtime_mark_last_busy(dev->dev);
 	dev_dbg(dev->dev, "rpm: autosuspend\n");
diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h
index a912ea6..0d7a3a1 100644
--- a/drivers/misc/mei/client.h
+++ b/drivers/misc/mei/client.h
@@ -226,7 +226,7 @@ int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb,
 
 void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb);
 
-void mei_host_client_init(struct work_struct *work);
+void mei_host_client_init(struct mei_device *dev);
 
 u8 mei_cl_notify_fop2req(enum mei_cb_file_ops fop);
 enum mei_cb_file_ops mei_cl_notify_req2fop(u8 request);
diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c
index d2798d5..5e305d2 100644
--- a/drivers/misc/mei/hbm.c
+++ b/drivers/misc/mei/hbm.c
@@ -549,7 +549,7 @@ static int mei_hbm_prop_req(struct mei_device *dev)
 	/* We got all client properties */
 	if (next_client_index == MEI_CLIENTS_MAX) {
 		dev->hbm_state = MEI_HBM_STARTED;
-		schedule_work(&dev->init_work);
+		mei_host_client_init(dev);
 
 		return 0;
 	}
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 52fde2b..f7c8dfd 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -91,7 +91,6 @@ EXPORT_SYMBOL_GPL(mei_fw_status2str);
  */
 void mei_cancel_work(struct mei_device *dev)
 {
-	cancel_work_sync(&dev->init_work);
 	cancel_work_sync(&dev->reset_work);
 	cancel_work_sync(&dev->bus_rescan_work);
 
@@ -393,7 +392,6 @@ void mei_device_init(struct mei_device *dev,
 	mei_io_list_init(&dev->ctrl_rd_list);
 
 	INIT_DELAYED_WORK(&dev->timer_work, mei_timer);
-	INIT_WORK(&dev->init_work, mei_host_client_init);
 	INIT_WORK(&dev->reset_work, mei_reset_work);
 	INIT_WORK(&dev->bus_rescan_work, mei_cl_bus_rescan_work);
 
diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h
index 2b9160e..db78e6d 100644
--- a/drivers/misc/mei/mei_dev.h
+++ b/drivers/misc/mei/mei_dev.h
@@ -410,7 +410,6 @@ const char *mei_pg_state_str(enum mei_pg_state state);
  * @iamthif_state : amthif processor state
  * @iamthif_canceled : current amthif command is canceled
  *
- * @init_work   : work item for the device init
  * @reset_work  : work item for the device reset
  * @bus_rescan_work : work item for the bus rescan
  *
@@ -503,7 +502,6 @@ struct mei_device {
 	enum iamthif_states iamthif_state;
 	bool iamthif_canceled;
 
-	struct work_struct init_work;
 	struct work_struct reset_work;
 	struct work_struct bus_rescan_work;