We need an async mechanism to prevent access to Slaves that are not fully-enumerated.
init_completion() will be invoked when the Slave becomes UNATTACHED, and complete() will be invoked when the state become ATTACHED. Any read/write before this status change will be delayed with a wait_for_completion().
Signed-off-by: Pierre-Louis Bossart pierre-louis.bossart@linux.intel.com --- include/linux/soundwire/sdw.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index a381a596212b..1381edfaa206 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -565,6 +565,7 @@ struct sdw_slave { u16 dev_num; bool probed; struct completion probe_complete; + struct completion enumeration_complete; };
#define dev_to_sdw_dev(_dev) container_of(_dev, struct sdw_slave, dev)