diff options
| author | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2025-08-13 15:57:39 -0400 |
|---|---|---|
| committer | Luiz Augusto von Dentz <luiz.von.dentz@intel.com> | 2025-09-27 11:37:01 -0400 |
| commit | c9beb36c14660713b948e289b1e352cc3d386d44 (patch) | |
| tree | 46131d5f555ab73f2fd5fb6960c4d05259134647 /net/bluetooth | |
| parent | 339a87883a14d6a818ca436fed41aa5d10e0f4bd (diff) | |
Bluetooth: hci_core: Detect if an ISO link has stalled
This attempts to detect if an ISO link has been waiting for an ISO
buffer for longer than the maximum allowed transport latency then
proceed to use hci_link_tx_to which prints an error and disconnects.
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/hci_core.c | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index e2bffad9816f..4cf4bb1187dc 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -3585,24 +3585,37 @@ static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type) static void __check_timeout(struct hci_dev *hdev, unsigned int cnt, u8 type) { - unsigned long last_tx; + unsigned long timeout; if (hci_dev_test_flag(hdev, HCI_UNCONFIGURED)) return; switch (type) { + case ACL_LINK: + /* tx timeout must be longer than maximum link supervision + * timeout (40.9 seconds) + */ + timeout = hdev->acl_last_tx + HCI_ACL_TX_TIMEOUT; + break; case LE_LINK: - last_tx = hdev->le_last_tx; + /* tx timeout must be longer than maximum link supervision + * timeout (40.9 seconds) + */ + timeout = hdev->le_last_tx + HCI_ACL_TX_TIMEOUT; break; - default: - last_tx = hdev->acl_last_tx; + case CIS_LINK: + case BIS_LINK: + case PA_LINK: + /* tx timeout must be longer than the maximum transport latency + * (8.388607 seconds) + */ + timeout = hdev->iso_last_tx + HCI_ISO_TX_TIMEOUT; break; + default: + return; } - /* tx timeout must be longer than maximum link supervision timeout - * (40.9 seconds) - */ - if (!cnt && time_after(jiffies, last_tx + HCI_ACL_TX_TIMEOUT)) + if (!cnt && time_after(jiffies, timeout)) hci_link_tx_to(hdev, type); } @@ -3759,10 +3772,15 @@ static void hci_sched_iso(struct hci_dev *hdev, __u8 type) return; cnt = &hdev->iso_cnt; + + __check_timeout(hdev, *cnt, type); + while (*cnt && (conn = hci_low_sent(hdev, type, "e))) { while (quote-- && (skb = skb_dequeue(&conn->data_q))) { BT_DBG("skb %p len %d", skb, skb->len); + hci_send_conn_frame(hdev, conn, skb); + hdev->iso_last_tx = jiffies; conn->sent++; if (conn->sent == ~0) |