Merge v7.1.5linux-rolling-stable

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 13 insertions, 1 deletions

diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h
index 592b646f6134..8cdd7be505d3 100644
--- a/include/linux/i3c/master.h
+++ b/include/linux/i3c/master.h
@@ -511,15 +511,23 @@ struct i3c_master_controller_ops {
  * @hotjoin: true if the master support hotjoin
  * @rpm_allowed: true if Runtime PM allowed
  * @rpm_ibi_allowed: true if IBI and Hot-Join allowed while runtime suspended
+ * @shutting_down: set to true when master begins shutdown or unregister
  * @boardinfo.i3c: list of I3C  boardinfo objects
  * @boardinfo.i2c: list of I2C boardinfo objects
  * @boardinfo: board-level information attached to devices connected on the bus
  * @bus: I3C bus exposed by this master
- * @wq: workqueue which can be used by master
+ * @wq: freezable workqueue which can be used by master
  *	drivers if they need to postpone operations that need to take place
  *	in a thread context. Typical examples are Hot Join processing which
  *	requires taking the bus lock in maintenance, which in turn, can only
  *	be done from a sleep-able context
+ * @hj_work: work item used to run DAA after a Hot-Join event is detected.
+ *           Queued to @wq by i3c_master_queue_hotjoin()
+ * @reg_work: work item used to register newly discovered I3C devices with
+ *            the driver model. Queued to @wq by i3c_master_do_daa_ext() so
+ *            that device registration is deferred out of the DAA caller's
+ *            context (notably the resume path), and is skipped if the
+ *            controller is shutting down
  * @dev_nack_retry_count: retry count when slave device nack
  *
  * A &struct i3c_master_controller has to be registered to the I3C subsystem
@@ -537,12 +545,15 @@ struct i3c_master_controller {
 	unsigned int hotjoin: 1;
 	unsigned int rpm_allowed: 1;
 	unsigned int rpm_ibi_allowed: 1;
+	bool shutting_down;
 	struct {
 		struct list_head i3c;
 		struct list_head i2c;
 	} boardinfo;
 	struct i3c_bus bus;
 	struct workqueue_struct *wq;
+	struct work_struct hj_work;
+	struct work_struct reg_work;
 	unsigned int dev_nack_retry_count;
 };
 
@@ -623,6 +634,7 @@ int i3c_master_register(struct i3c_master_controller *master,
 void i3c_master_unregister(struct i3c_master_controller *master);
 int i3c_master_enable_hotjoin(struct i3c_master_controller *master);
 int i3c_master_disable_hotjoin(struct i3c_master_controller *master);
+void i3c_master_queue_hotjoin(struct i3c_master_controller *master);
 
 /**
  * i3c_dev_get_master_data() - get master private data attached to an I3C