[PATCH v5 4/5] Bluetooth: hci_qca: Disable IBS state machine and flush Tx buffer
From: Balakrishna Godavarthi <hidden>
Date: 2018-12-20 14:47:08
Also in:
linux-arm-msm, lkml
Subsystem:
bluetooth drivers, qualcomm bluetooth driver, the rest · Maintainers:
Marcel Holtmann, Luiz Augusto von Dentz, Bartosz Golaszewski, Linus Torvalds
During hci down we observed IBS sleep commands are queued in the Tx buffer and hci_uart_write_work is sending data to the chip which is not required as the chip is powered off. This patch will disable IBS and flush the Tx buffer before we turn off the chip. Signed-off-by: Balakrishna Godavarthi <redacted> --- drivers/bluetooth/hci_qca.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 52de0b5a0620..cccc9a525926 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c@@ -1286,6 +1286,8 @@ static void qca_power_shutdown(struct hci_uart *hu) * still open, discard all the garbage data received on the Rx line. */ set_bit(STATE_DISCARD_RX, &qca->flags); + clear_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags); + qca_flush(hu); serdev_device_write_flush(hu->serdev); host_set_baudrate(hu, 2400); qca_send_power_pulse(hu, QCA_WCN3990_POWEROFF_PULSE);
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