rtac: add NULL pointer check for asm handle

Add NULL pointer check for asm handle before assignment.

Change-Id: Ic371c8486d153a6a95cd4e23d65ea0be0a9e70e8
Signed-off-by: Timothy Sham <tsham@codeaurora.org>

diff --git a/sound/soc/msm/qdsp6v2/rtac.c b/sound/soc/msm/qdsp6v2/rtac.c
index 0a33171..5572a3d 100644 (file)
--- a/sound/soc/msm/qdsp6v2/rtac.c
+++ b/sound/soc/msm/qdsp6v2/rtac.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012-2018, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2019, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -962,7 +962,8 @@ void rtac_set_asm_handle(u32 session_id, void *handle)
        pr_debug("%s\n", __func__);
 
        mutex_lock(&rtac_asm_apr_mutex);
-       rtac_asm_apr_data[session_id].apr_handle = handle;
+       if (rtac_asm_apr_data[session_id].apr_handle)
+               rtac_asm_apr_data[session_id].apr_handle = handle;
        mutex_unlock(&rtac_asm_apr_mutex);
 }