soundwire: bus: split handling of Device0 events

Assigning a device number to a Slave will result in additional events
when it reports its status in a PING frame. There is no point in
dealing with all the other devices in a loop, this can be done when a
non-device0 event happens.
Signed-off-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190725234032.21152-19-pierre-louis.bossart@linux.intel.comSigned-off-by: NVinod Koul <vkoul@kernel.org>

drivers/soundwire/bus.c

@@ -972,6 +972,11 @@ int sdw_handle_slave_status(struct sdw_bus *bus,
 		ret = sdw_program_device_num(bus);
 		if (ret)
 			dev_err(bus->dev, "Slave attach failed: %d\n", ret);
+		/*
+		 * programming a device number will have side effects,
+		 * so we deal with other devices at a later time
+		 */
+		return ret;
 	}
 
 	/* Continue to check other slave statuses */