@@ -1447,9 +1447,6 @@ static int nxp_shutdown(struct hci_dev *hdev)
/* HCI_NXP_IND_RESET command may not returns any response */
if (!IS_ERR(skb))
kfree_skb(skb);
- } else if (nxpdev->current_baudrate != nxpdev->fw_init_baudrate) {
- nxpdev->new_baudrate = nxpdev->fw_init_baudrate;
- nxp_set_baudrate_cmd(hdev, NULL);
}
return 0;
@@ -1801,13 +1798,15 @@ static void nxp_serdev_remove(struct serdev_device *serdev)
clear_bit(BTNXPUART_FW_DOWNLOADING, &nxpdev->tx_state);
wake_up_interruptible(&nxpdev->check_boot_sign_wait_q);
wake_up_interruptible(&nxpdev->fw_dnld_done_wait_q);
- }
-
- if (test_bit(HCI_RUNNING, &hdev->flags)) {
- /* Ensure shutdown callback is executed before unregistering, so
- * that baudrate is reset to initial value.
+ } else {
+ /* Restore FW baudrate to fw_init_baudrate if changed.
+ * This will ensure FW baudrate is in sync with
+ * driver baudrate in case this driver is re-inserted.
*/
- nxp_shutdown(hdev);
+ if (nxpdev->current_baudrate != nxpdev->fw_init_baudrate) {
+ nxpdev->new_baudrate = nxpdev->fw_init_baudrate;
+ nxp_set_baudrate_cmd(hdev, NULL);
+ }
}
ps_cleanup(nxpdev);
This reverts the change baudrate logic in nxp_shutdown. Earlier, when the driver was removed, it restored the controller baudrate to fw_init_baudrate, so that on re-loading the driver, things work fine. However, if the driver was removed while hci0 interface is down, the change baudrate vendor command could not be sent by the driver. When the driver was re-loaded, host and controller baudrate would be mismatched and hci initialization would fail. The only way to recover would be to reboot the system. This issue was fixed by moving the restore baudrate logic from nxp_serdev_remove() to nxp_shutdown(). This fix however caused another issue with the command "hciconfig hci0 reset", which makes hci0 DOWN and UP immediately. Running "bluetoothctl power off" and "bluetoothctl power on" in a tight loop works fine. To maintain support for "hciconfig reset" command, the above mentioned fix is reverted. Fixes: 6fca6781d19d ("Bluetooth: btnxpuart: Move vendor specific initialization to .post_init") Signed-off-by: Neeraj Sanjay Kale <neeraj.sanjaykale@nxp.com> --- drivers/bluetooth/btnxpuart.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-)