SCO connection cannot be setup to devices that do not support retransmission.
Patch based on http://permalink.gmane.org/gmane.linux.bluez.kernel/7779 and
adapted for this kernel version.
Code changed to check SCO/eSCO type before setting retransmission effort
and max. latency. The purpose of the patch is to support older devices not
capable of eSCO.
Tested on Blackberry 655+ headset which does not support retransmission.
Credits go to Alexander Sommerhuber.
Signed-off-by: Bernhard Thaler <bernhard.tha...@r-it.at>
---
net/bluetooth/hci_conn.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index faff624..f6e3183 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -194,10 +194,18 @@ bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
param = &sco_param_wideband[conn->attempt - 1];
break;
case SCO_AIRMODE_CVSD:
- if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
- return false;
- cp.retrans_effort = 0x01;
- param = &sco_param_cvsd[conn->attempt - 1];
+ if (!lmp_esco_capable(conn->link)) {
+ /* sco_param_cvsd contains SCO in last two elements */
+ if ((conn->attempt + 3) > ARRAY_SIZE(sco_param_cvsd))
+ return false;
+ cp.retrans_effort = 0xff;
+ param = &sco_param_cvsd[(conn->attempt + 2)];
+ } else {
+ if (conn->attempt > ARRAY_SIZE(sco_param_cvsd))
+ return false;
+ cp.retrans_effort = 0x01;
+ param = &sco_param_cvsd[conn->attempt - 1];
+ }
break;
default:
return false;
--
1.7.10.4
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