When the SSR (SubSystem Restart) duration exceeds 2 seconds, it triggers
host tx_idle_timeout, which sets host TX state to sleep. due to the
hardware pulling up bt_en, the firmware is not downloaded after the SSR.
As a result, the controller does not enter sleep mode. Consequently,
when the host sends a command afterward, it sends 0xFD to the controller,
but the controller does not respond, leading to a command timeout.
So reset tx_idle_timer after SSR to prevent host enter TX IBS_Sloeep mode.
Signed-off-by: Shuai Zhang <quic_shuaz@xxxxxxxxxxx>
---
drivers/bluetooth/hci_qca.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 33c2dd7b8..1fb8eea09 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1668,6 +1668,15 @@ static void qca_hw_error(struct hci_dev *hdev, u8 code)
if (!test_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks)) {
clear_bit(QCA_SSR_TRIGGERED, &qca->flags);
clear_bit(QCA_IBS_DISABLED, &qca->flags);
+ /*
+ * When the SSR (Sub-System Restart) duration exceeds 2 seconds,
+ * it triggers host tx_idle_timeout, which sets host TX state
+ * to sleep. Reset tx_idle_timer after SSR to prevent
+ * host enter TX IBS_Sloeep mode.
+ */
+ mod_timer(&qca->tx_idle_timer, jiffies +
+ msecs_to_jiffies(qca->tx_idle_delay));
+
qca->tx_ibs_state = HCI_IBS_TX_AWAKE;
qca->memdump_state = QCA_MEMDUMP_IDLE;
msleep(50);
--
2.34.1
