commit 94de74c9450130f9dd01972414b18cb358062876
author ty.lee <ty.lee@lge.com> Mon Sep 03 17:03:12 2012 +0900
committer Iliyan Malchev <malchev@google.com> Tue Sep 11 17:58:51 2012 -0700
tree ea8af5f3a829e162bf67cf00be6fb567a66b136c
parent 0a019914794cc27f5dacddf4e5dbc019dbe21788

audio: avoid latent media server crash during device is booting

Sometimes media server is killed by alsa_ucm during device is booting.
A alsa_ucm gets a index of "use case device" from get_use_case_index()
function.
But, get_use_case_index() function can be returned a wrong value
(dev_index = -22 used index of dev_list[] array) at booting time.
This patch avoids latent media server crash causing abnormal value
as using index of dev_list[] array.

Change-Id: I961465f99b994d3ab1b26ee74d6d0978159960f4

libalsa-intf/alsa_ucm.c

diff --git a/libalsa-intf/alsa_ucm.c b/libalsa-intf/alsa_ucm.c
index 075deca..59721ad 100644
--- a/libalsa-intf/alsa_ucm.c
+++ b/libalsa-intf/alsa_ucm.c
@@ -1064,7 +1064,8 @@
     dev_list =
          uc_mgr->card_ctxt_ptr->use_case_verb_list[verb_index].device_ctrls;
     dev_index = get_use_case_index(uc_mgr, device, CTRL_LIST_DEVICE);
-    capability = dev_list[dev_index].capability;
+    if (dev_index >= 0)
+        capability = dev_list[dev_index].capability;
     if (strncmp(uc_mgr->card_ctxt_ptr->current_verb, SND_USE_CASE_VERB_INACTIVE,
         strlen(SND_USE_CASE_VERB_INACTIVE))) {
         uc_list =