remove pcm_prepare in pcm_open

For the dynamic pcm device, it is valid to specify the backend after
opening it. However, it is invalid to call prepare on a dynamic pcm
device without connecting any backend device. We should not do
pcm_prepare in pcm_open.

See also: Issue #197

1 files changed, 0 insertions, 4 deletions

diff --git a/src/pcm.c b/src/pcm.c
index 169d982..8678919 100644
--- a/src/pcm.c
+++ b/src/pcm.c
@@ -1101,10 +1101,6 @@ struct pcm *pcm_open(unsigned int card, unsigned int device,
     }
 #endif
 
-    /* prepare here so the user does not need to do this later */
-    if (pcm_prepare(pcm))
-        goto fail;
-
     pcm->xruns = 0;
     return pcm;