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alsa: Don't try to use ELD controls with UCM

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This fixes a crash that occurred when trying to access non-existent
port data. Doing this:

    pa_alsa_port_data *data = PA_DEVICE_PORT_DATA(port);

is not a good idea when using UCM, because in the UCM mode ports don't
have any data, so the data pointer points to some random memory.
This commit is contained in:
Tanu Kaskinen 2015-02-07 00:15:34 +02:00
parent ff5e7b8707
commit 82ec47898e
1 changed files with 6 additions and 0 deletions
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6
src/modules/alsa/module-alsa-card.c
View file

@ -455,6 +455,12 @@ static void init_eld_ctls(struct userdata *u) {
if (!u->mixer_handle)
return;
/* The code in this function expects ports to have a pa_alsa_port_data
* struct as their data, but in UCM mode ports don't have any data. Hence,
* the ELD controls can't currently be used in UCM mode. */
if (u->use_ucm)
return;
PA_HASHMAP_FOREACH(port, u->card->ports, state) {
pa_alsa_port_data *data = PA_DEVICE_PORT_DATA(port);
snd_mixer_elem_t* melem;