Hi Kai-Heng,
Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> writes:
> Hi Mattijs,
>
> On Thu, Aug 5, 2021 at 2:55 PM Mattijs Korpershoek
> <mkorpershoek@xxxxxxxxxxxx> wrote:
>>
>> Hi Kai-Heng,
>>
>> Thanks for your patch,
>>
>> Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> writes:
>>
>
> [snipped]
>
>> I confirm this diff works for me:
>>
>> root@i500-pumpkin:~# hciconfig hci0 up
>> root@i500-pumpkin:~# hciconfig hci0 down
>> root@i500-pumpkin:~# hciconfig hci0 up
>> root@i500-pumpkin:~# hciconfig hci0
>> hci0: Type: Primary Bus: SDIO
>> BD Address: 00:0C:E7:55:FF:12 ACL MTU: 1021:8 SCO MTU: 244:4
>> UP RUNNING
>> RX bytes:11268 acl:0 sco:0 events:829 errors:0
>> TX bytes:182569 acl:0 sco:0 commands:829 errors:0
>>
>> root@i500-pumpkin:~# hcitool scan
>> Scanning ...
>> <redacted> Pixel 3 XL
>>
>> Tested-by: Mattijs Korpershoek <mkorpershoek@xxxxxxxxxxxx>
>
> I found that btmtksdio_flush() only cancels the work instead of doing
> flush_work(). That probably explains why putting ->shutdown right
> before ->flush doesn't work.
> So can you please test the following again:
> diff --git a/drivers/bluetooth/btmtksdio.c b/drivers/bluetooth/btmtksdio.c
> index 9872ef18f9fea..b33c05ad2150b 100644
> --- a/drivers/bluetooth/btmtksdio.c
> +++ b/drivers/bluetooth/btmtksdio.c
> @@ -649,9 +649,9 @@ static int btmtksdio_flush(struct hci_dev *hdev)
> {
> struct btmtksdio_dev *bdev = hci_get_drvdata(hdev);
>
> - skb_queue_purge(&bdev->txq);
> + flush_work(&bdev->tx_work);
>
> - cancel_work_sync(&bdev->tx_work);
> + skb_queue_purge(&bdev->txq);
>
> return 0;
> }
> diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
> index 2560ed2f144d4..a61e610a400cb 100644
>
> --- a/net/bluetooth/hci_core.c
> +++ b/net/bluetooth/hci_core.c
> @@ -1785,6 +1785,14 @@ int hci_dev_do_close(struct hci_dev *hdev)
> aosp_do_close(hdev);
> msft_do_close(hdev);
>
> + if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
> + !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
> + test_bit(HCI_UP, &hdev->flags)) {
> + /* Execute vendor specific shutdown routine */
> + if (hdev->shutdown)
> + hdev->shutdown(hdev);
> + }
> +
> if (hdev->flush)
> hdev->flush(hdev);
>
> @@ -1798,14 +1806,6 @@ int hci_dev_do_close(struct hci_dev *hdev)
> clear_bit(HCI_INIT, &hdev->flags);
> }
>
> - if (!hci_dev_test_flag(hdev, HCI_UNREGISTER) &&
> - !hci_dev_test_flag(hdev, HCI_USER_CHANNEL) &&
> - test_bit(HCI_UP, &hdev->flags)) {
> - /* Execute vendor specific shutdown routine */
> - if (hdev->shutdown)
> - hdev->shutdown(hdev);
> - }
> -
> /* flush cmd work */
> flush_work(&hdev->cmd_work);
I've tried this but I have the same (broken) symptoms as before.
Here are some logs of v3:
dmesg: https://pastebin.com/1x4UHkzy
ftrace: https://pastebin.com/Lm1d6AWy
Mattijs
>
> Kai-Heng
