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Bluetooth: Skip eSCO 2M params when not supported

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If a peer device doesn't support eSCO 2M we should skip the params that
use it when setting up sync connection since they will always fail.

Signed-off-by: Yu Liu <yudiliu@google.com>
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Yu Liu 2021-01-29 13:53:48 -08:00 committed by Marcel Holtmann
parent b8ddc3b14c
commit 8b1c324c9f
2 changed files with 19 additions and 2 deletions
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1
include/net/bluetooth/hci_core.h
View File

@ -1365,6 +1365,7 @@ void hci_conn_del_sysfs(struct hci_conn *conn);
#define lmp_le_capable(dev) ((dev)->features[0][4] & LMP_LE)
#define lmp_sniffsubr_capable(dev) ((dev)->features[0][5] & LMP_SNIFF_SUBR)
#define lmp_pause_enc_capable(dev) ((dev)->features[0][5] & LMP_PAUSE_ENC)
#define lmp_esco_2m_capable(dev) ((dev)->features[0][5] & LMP_EDR_ESCO_2M)
#define lmp_ext_inq_capable(dev) ((dev)->features[0][6] & LMP_EXT_INQ)
#define lmp_le_br_capable(dev) (!!((dev)->features[0][6] & LMP_SIMUL_LE_BR))
#define lmp_ssp_capable(dev) ((dev)->features[0][6] & LMP_SIMPLE_PAIR)

20
net/bluetooth/hci_conn.c
View File

@ -293,6 +293,20 @@ static void hci_add_sco(struct hci_conn *conn, __u16 handle)
hci_send_cmd(hdev, HCI_OP_ADD_SCO, sizeof(cp), &cp);
}
static bool find_next_esco_param(struct hci_conn *conn,
const struct sco_param *esco_param, int size)
{
for (; conn->attempt <= size; conn->attempt++) {
if (lmp_esco_2m_capable(conn->link) ||
(esco_param[conn->attempt - 1].pkt_type & ESCO_2EV3))
break;
BT_DBG("hcon %p skipped attempt %d, eSCO 2M not supported",
conn, conn->attempt);
}
return conn->attempt <= size;
}
bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
{
struct hci_dev *hdev = conn->hdev;
@ -314,13 +328,15 @@ bool hci_setup_sync(struct hci_conn *conn, __u16 handle)
switch (conn->setting & SCO_AIRMODE_MASK) {
case SCO_AIRMODE_TRANSP:
if (conn->attempt > ARRAY_SIZE(esco_param_msbc))
if (!find_next_esco_param(conn, esco_param_msbc,
ARRAY_SIZE(esco_param_msbc)))
return false;
param = &esco_param_msbc[conn->attempt - 1];
break;
case SCO_AIRMODE_CVSD:
if (lmp_esco_capable(conn->link)) {
if (conn->attempt > ARRAY_SIZE(esco_param_cvsd))
if (!find_next_esco_param(conn, esco_param_cvsd,
ARRAY_SIZE(esco_param_cvsd)))
return false;
param = &esco_param_cvsd[conn->attempt - 1];
} else {