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Message-ID: <0574f6d2-51dd-4962-40fe-9424a19cb3c7@redhat.com>
Date: Sun, 30 Oct 2022 10:59:18 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Ismael Ferreras Morezuelas <swyterzone@...il.com>,
marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com,
davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
luiz.von.dentz@...el.com, quic_zijuhu@...cinc.com
Cc: linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
netdev@...r.kernel.org
Subject: Re: [PATCH 1/3] Bluetooth: btusb: Fix Chinese CSR dongles again by
re-adding ERR_DATA_REPORTING quirk
Hi Ismael,
On 10/29/22 22:24, Ismael Ferreras Morezuelas wrote:
> A patch series by a Qualcomm engineer essentially removed my
> quirk/workaround because they thought it was unnecessary.
>
> It wasn't, and it broke everything again:
>
> https://patchwork.kernel.org/project/netdevbpf/list/?series=661703&archive=both&state=*
>
> He argues that the quirk is not necessary because the code should check if the dongle
> says if it's supported or not. The problem is that for these Chinese CSR
> clones they say that it would work, but it's a lie. Take a look:
>
> = New Index: 00:00:00:00:00:00 (Primary,USB,hci0) [hci0] 11.272194
> = Open Index: 00:00:00:00:00:00 [hci0] 11.272384
> < HCI Command: Read Local Version Information (0x04|0x0001) plen 0 #1 [hci0] 11.272400
>> HCI Event: Command Complete (0x0e) plen 12 #2
>> [hci0] 11.276039
> Read Local Version Information (0x04|0x0001) ncmd 1
> Status: Success (0x00)
> HCI version: Bluetooth 5.0 (0x09) - Revision 2064 (0x0810)
> LMP version: Bluetooth 5.0 (0x09) - Subversion 8978 (0x2312)
> Manufacturer: Cambridge Silicon Radio (10)
> ...
> < HCI Command: Read Local Supported Features (0x04|0x0003) plen 0 #5 [hci0] 11.648370
>> HCI Event: Command Complete (0x0e) plen 68 #12
>> [hci0] 11.668030
> Read Local Supported Commands (0x04|0x0002) ncmd 1
> Status: Success (0x00)
> Commands: 163 entries
> ...
> Read Default Erroneous Data Reporting (Octet 18 - Bit 2)
> Write Default Erroneous Data Reporting (Octet 18 - Bit 3)
> ...
> ...
> < HCI Command: Read Default Erroneous Data Reporting (0x03|0x005a) plen 0 #47 [hci0] 11.748352
> = Close Index: 00:1A:7D:DA:71:XX [hci0] 13.776824
>
> So bring it back wholesale.
>
> Fixes: 63b1a7dd3 (Bluetooth: hci_sync: Remove HCI_QUIRK_BROKEN_ERR_DATA_REPORTING)
> Fixes: e168f69008 (Bluetooth: btusb: Remove HCI_QUIRK_BROKEN_ERR_DATA_REPORTING for fake CSR)
> Fixes: 766ae2422b (Bluetooth: hci_sync: Check LMP feature bit instead of quirk)
>
> Cc: stable@...r.kernel.org
> Cc: Zijun Hu <quic_zijuhu@...cinc.com>
> Cc: Luiz Augusto von Dentz <luiz.von.dentz@...el.com>
> Cc: Hans de Goede <hdegoede@...hat.com>
> Tested-by: Ismael Ferreras Morezuelas <swyterzone@...il.com>
> Signed-off-by: Ismael Ferreras Morezuelas <swyterzone@...il.com>
Thank you very much for your continued work on making these
clones work with Linux!
The entire series looks good to me:
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
for the series.
Regards,
Hans
> ---
> drivers/bluetooth/btusb.c | 1 +
> include/net/bluetooth/hci.h | 11 +++++++++++
> net/bluetooth/hci_sync.c | 9 +++++++--
> 3 files changed, 19 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/bluetooth/btusb.c b/drivers/bluetooth/btusb.c
> index 3b269060e91f..1360b2163ec5 100644
> --- a/drivers/bluetooth/btusb.c
> +++ b/drivers/bluetooth/btusb.c
> @@ -2174,6 +2174,7 @@ static int btusb_setup_csr(struct hci_dev *hdev)
> * without these the controller will lock up.
> */
> set_bit(HCI_QUIRK_BROKEN_STORED_LINK_KEY, &hdev->quirks);
> + set_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks);
> set_bit(HCI_QUIRK_BROKEN_FILTER_CLEAR_ALL, &hdev->quirks);
> set_bit(HCI_QUIRK_NO_SUSPEND_NOTIFIER, &hdev->quirks);
>
> diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
> index e004ba04a9ae..0fe789f6a653 100644
> --- a/include/net/bluetooth/hci.h
> +++ b/include/net/bluetooth/hci.h
> @@ -228,6 +228,17 @@ enum {
> */
> HCI_QUIRK_VALID_LE_STATES,
>
> + /* When this quirk is set, then erroneous data reporting
> + * is ignored. This is mainly due to the fact that the HCI
> + * Read Default Erroneous Data Reporting command is advertised,
> + * but not supported; these controllers often reply with unknown
> + * command and tend to lock up randomly. Needing a hard reset.
> + *
> + * This quirk can be set before hci_register_dev is called or
> + * during the hdev->setup vendor callback.
> + */
> + HCI_QUIRK_BROKEN_ERR_DATA_REPORTING,
> +
> /*
> * When this quirk is set, then the hci_suspend_notifier is not
> * registered. This is intended for devices which drop completely
> diff --git a/net/bluetooth/hci_sync.c b/net/bluetooth/hci_sync.c
> index bd9eb713b26b..0a7abc817f10 100644
> --- a/net/bluetooth/hci_sync.c
> +++ b/net/bluetooth/hci_sync.c
> @@ -3798,7 +3798,8 @@ static int hci_read_page_scan_activity_sync(struct hci_dev *hdev)
> static int hci_read_def_err_data_reporting_sync(struct hci_dev *hdev)
> {
> if (!(hdev->commands[18] & 0x04) ||
> - !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING))
> + !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
> + test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
> return 0;
>
> return __hci_cmd_sync_status(hdev, HCI_OP_READ_DEF_ERR_DATA_REPORTING,
> @@ -4316,7 +4317,8 @@ static int hci_set_err_data_report_sync(struct hci_dev *hdev)
> bool enabled = hci_dev_test_flag(hdev, HCI_WIDEBAND_SPEECH_ENABLED);
>
> if (!(hdev->commands[18] & 0x08) ||
> - !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING))
> + !(hdev->features[0][6] & LMP_ERR_DATA_REPORTING) ||
> + test_bit(HCI_QUIRK_BROKEN_ERR_DATA_REPORTING, &hdev->quirks))
> return 0;
>
> if (enabled == hdev->err_data_reporting)
> @@ -4475,6 +4477,9 @@ static const struct {
> HCI_QUIRK_BROKEN(STORED_LINK_KEY,
> "HCI Delete Stored Link Key command is advertised, "
> "but not supported."),
> + HCI_QUIRK_BROKEN(ERR_DATA_REPORTING,
> + "HCI Read Default Erroneous Data Reporting command is "
> + "advertised, but not supported."),
> HCI_QUIRK_BROKEN(READ_TRANSMIT_POWER,
> "HCI Read Transmit Power Level command is advertised, "
> "but not supported."),
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