Commit a801ad8f authored Oct 15, 2019 by Meng Wang Committed by Gerrit - the friendly Code Review server Oct 14, 2019

dsp: lsm: move lsm_common deregister out of mutex_lock



When dispatch_event in apr and q6lsm_client_free in q6lsm
are running concurrently, there may be deadlock between
session_lock in lsm and svc->m_lock in apr for lsm_common.
Move lsm_common mmap apr deregister out of mutex_lock to
avoid deadlock.

Change-Id: I7c96ba12834bd4a7c8e5ca1b78d798578678b251
Signed-off-by: Meng Wang <mengw@codeaurora.org>

parent f1385241

dsp/q6lsm.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -376,10 +376,10 @@ void q6lsm_client_free(struct lsm_client *client)
		return;
		}
		apr_deregister(client->apr);
		q6lsm_mmap_apr_dereg();
		client->mmap_apr = NULL;
		mutex_lock(&session_lock);
		q6lsm_session_free(client);
		q6lsm_mmap_apr_dereg();
		mutex_destroy(&client->cmd_lock);
		kfree(client);
		client = NULL;