samsung-sm8650/android_kernel_samsung_sm8650-modules
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dsp: lsm: adjust mutex_lock to avoid deadlock

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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. Adjust session_lock
in q6lsm_client_free to avoid deadlock.

Change-Id: I26eb788d4c17af78272dd1f717717e865dfbd0ac
Signed-off-by: Meng Wang <mengw@codeaurora.org>
This commit is contained in:
Meng Wang
2019-08-26 16:49:28 +08:00
parent 47673f2f83
commit 818d4e9b7f
1 changed files with 1 additions and 1 deletions
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2
dsp/q6lsm.c
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@@ -372,9 +372,9 @@ void q6lsm_client_free(struct lsm_client *client)
pr_err("%s: Invalid Session %d\n", __func__, client->session);
return;
}
mutex_lock(&session_lock);
apr_deregister(client->apr);
client->mmap_apr = NULL;
mutex_lock(&session_lock);
q6lsm_session_free(client);
q6lsm_mmap_apr_dereg();
mutex_destroy(&client->cmd_lock);