Make CIG auto-allocation to select the first CIG_ID that is still
configurable. Also use correct CIG_ID range (see Core v5.3 Vol 4 Part E
Sec 7.8.97 p.2553).
Previously, it would always select CIG_ID 0 regardless of anything,
because cis_list with data.cis == 0xff (BT_ISO_QOS_CIS_UNSET) would not
count any CIS. Since we are not adding CIS here, use find_cis instead.
Fixes: 26afbd826ee3 ("Bluetooth: Add initial implementation of CIS connections")
Signed-off-by: Pauli Virtanen <pav@xxxxxx>
---
Notes:
* v2: add forgotten signoff + fixes
It could also make sense to always auto-allocate to an unused CIG_ID
instead. However, that changes current behavior, and would force
userspace to do the allocation themselves as they may want to use as few
CIG as possible. I think e.g Intel AX210 doesn't support multiple CIG.
With the patchset adding new BlueZ iso-tester CIG tests:
ISO Connect2 CIG auto/auto Seq - Success Passed 0.148 seconds
net/bluetooth/hci_conn.c | 13 ++++++-------
1 file changed, 6 insertions(+), 7 deletions(-)
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 2363477af89d..99150d054a8d 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -1771,24 +1771,23 @@ static bool hci_le_set_cig_params(struct hci_conn *conn, struct bt_iso_qos *qos)
memset(&data, 0, sizeof(data));
- /* Allocate a CIG if not set */
+ /* Allocate first still reconfigurable CIG if not set */
if (qos->ucast.cig == BT_ISO_QOS_CIG_UNSET) {
- for (data.cig = 0x00; data.cig < 0xff; data.cig++) {
+ for (data.cig = 0x00; data.cig < 0xf0; data.cig++) {
data.count = 0;
- data.cis = 0xff;
- hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
- BT_BOUND, &data);
+ hci_conn_hash_list_state(hdev, find_cis, ISO_LINK,
+ BT_CONNECT, &data);
if (data.count)
continue;
- hci_conn_hash_list_state(hdev, cis_list, ISO_LINK,
+ hci_conn_hash_list_state(hdev, find_cis, ISO_LINK,
BT_CONNECTED, &data);
if (!data.count)
break;
}
- if (data.cig == 0xff)
+ if (data.cig == 0xf0)
return false;
/* Update CIG */
--
2.40.1
