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Commit 77bbbcf6 authored by Johan Hovold's avatar Johan Hovold Committed by Greg Kroah-Hartman
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greybus: operation: restructure activation state handling 



Restructure the operation activation state handling in preparation for a
new disconnecting state.

Signed-off-by: default avatarJohan Hovold <johan@hovoldconsulting.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@google.com>
parent 8890f957

drivers/staging/greybus/operation.c

+14 −5
Original line number Diff line number Diff line
@@ -47,11 +47,15 @@ static int gb_operation_get_active(struct gb_operation *operation) 


	spin_lock_irqsave(&connection->lock, flags);



	if (connection->state != GB_CONNECTION_STATE_ENABLED &&

			(connection->state != GB_CONNECTION_STATE_ENABLED_TX ||

			 gb_operation_is_incoming(operation))) {

		spin_unlock_irqrestore(&connection->lock, flags);

		return -ENOTCONN;

	switch (connection->state) {

	case GB_CONNECTION_STATE_ENABLED:

		break;

	case GB_CONNECTION_STATE_ENABLED_TX:

		if (gb_operation_is_incoming(operation))

			goto err_unlock;

		break;

	default:

		goto err_unlock;

	}



	if (operation->active++ == 0)
@@ -62,6 +66,11 @@ static int gb_operation_get_active(struct gb_operation *operation) 
	spin_unlock_irqrestore(&connection->lock, flags);



	return 0;



err_unlock:

	spin_unlock_irqrestore(&connection->lock, flags);



	return -ENOTCONN;

}



/* Caller holds operation reference. */