Re: [PATCH] Bluetooth: btrtl: Add null check in setup
From: Marcel Holtmann
Date: Wed Dec 23 2020 - 01:22:56 EST
Hi Abhishek,
> btrtl_dev->ic_info is only available from the controller on cold boot
> (the lmp subversion matches the device model and this is used to look up
> the ic_info). On warm boots (firmware already loaded),
> btrtl_dev->ic_info is null.
>
> Fixes: 05672a2c14a4 (Bluetooth: btrtl: Enable central-peripheral role)
> Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@xxxxxxxxxxxx>
> ---
>
> drivers/bluetooth/btrtl.c | 23 +++++++++++++----------
> 1 file changed, 13 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c
> index 1abf6a4d672734f..978f3c773856b05 100644
> --- a/drivers/bluetooth/btrtl.c
> +++ b/drivers/bluetooth/btrtl.c
> @@ -719,16 +719,19 @@ int btrtl_setup_realtek(struct hci_dev *hdev)
> */
> set_bit(HCI_QUIRK_SIMULTANEOUS_DISCOVERY, &hdev->quirks);
>
> - /* Enable central-peripheral role (able to create new connections with
> - * an existing connection in slave role).
> - */
> - switch (btrtl_dev->ic_info->lmp_subver) {
> - case RTL_ROM_LMP_8822B:
> - set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
> - break;
> - default:
> - rtl_dev_dbg(hdev, "Central-peripheral role not enabled.");
> - break;
> + if (btrtl_dev->ic_info) {
> + /* Enable central-peripheral role (able to create new
> + * connections with an existing connection in slave role).
> + */
> + switch (btrtl_dev->ic_info->lmp_subver) {
> + case RTL_ROM_LMP_8822B:
> + set_bit(HCI_QUIRK_VALID_LE_STATES, &hdev->quirks);
> + break;
> + default:
> + rtl_dev_dbg(hdev,
> + "Central-peripheral role not enabled.");
> + break;
> + }
> }
if (!btrtl_dev->ic_info)
goto done;
>
> btrtl_free(btrtl_dev);
Regards
Marcel