From: Archie Pusaka <apusaka@xxxxxxxxxxxx>
There is a possibility where BlueZ initiate an A2DP connection just
around the same time as the peripheral also initiate it.
One scenario is the peripheral initiate the connection first, so
confirm_cb() on /profiles/audio/a2dp.c is called. However, while we
are waiting for the authentication step, BlueZ initiate a connection
to the peripheral, therefore a2dp_sink_connect() is called, which
from there a2dp_avdtp_get() is called.
If this happens: When calling confirm_cb(), chan for the
corresponding device is created.
Then when calling a2dp_avdtp_get(), chan will be found as it is
created in confirm_cb(), and the value of chan->io is not NULL.
However, a NULL is supplied instead to create a new session and
assigned to chan->session.
Then when calling connect_cb(), chan->session will NOT be NULL, as
it is assigned in a2dp_avdtp_get(). Nevertheless, chan->session is
always assigned a new value.
These cause failure in connection.
Therefore, fixing this by supplying the value of chan->io inside
a2dp_avdtp_get() (it's going to be NULL on the normal case so it is
fine), and check whether chan->session already assigned inside
connect_cb().
---
profiles/audio/a2dp.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/profiles/audio/a2dp.c b/profiles/audio/a2dp.c
index e8262cdfe..a5590b24c 100644
--- a/profiles/audio/a2dp.c
+++ b/profiles/audio/a2dp.c
@@ -2118,7 +2118,7 @@ struct avdtp *a2dp_avdtp_get(struct btd_device *device)
return NULL;
found:
- chan->session = avdtp_new(NULL, device, server->seps);
+ chan->session = avdtp_new(chan->io, device, server->seps);
if (!chan->session) {
channel_remove(chan);
return NULL;
@@ -2136,10 +2136,13 @@ static void connect_cb(GIOChannel *io, GError *err, gpointer user_data)
goto fail;
}
- chan->session = avdtp_new(chan->io, chan->device, chan->server->seps);
if (!chan->session) {
- error("Unable to create AVDTP session");
- goto fail;
+ chan->session = avdtp_new(chan->io, chan->device,
+ chan->server->seps);
+ if (!chan->session) {
+ error("Unable to create AVDTP session");
+ goto fail;
+ }
}
g_io_channel_unref(chan->io);
--
2.25.1.481.gfbce0eb801-goog
