Messages in this thread | | | Subject | Re: [PATCH v3 1/2] Bluetooth: add quirk disabling LE Read Transmit Power | From | Marcel Holtmann <> | Date | Mon, 29 Nov 2021 12:02:23 +0100 |
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Hi Aditya,
> Some devices have a bug causing them to not work if they query > LE tx power on startup. Thus we add a quirk in order to not query it > and default min/max tx power values to HCI_TX_POWER_INVALID. > > Signed-off-by: Aditya Garg <gargaditya08@live.com> > --- > include/net/bluetooth/hci.h | 9 +++++++++ > net/bluetooth/hci_core.c | 3 ++- > 2 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h > index 63065bc01b766c..383342efcdc464 100644 > --- a/include/net/bluetooth/hci.h > +++ b/include/net/bluetooth/hci.h > @@ -246,6 +246,15 @@ enum { > * HCI after resume. > */ > HCI_QUIRK_NO_SUSPEND_NOTIFIER, > + > + /* > + * When this quirk is set, LE tx power is not queried on startup > + * and the min/max tx power values default to HCI_TX_POWER_INVALID. > + * > + * This quirk can be set before hci_register_dev is called or > + * during the hdev->setup vendor callback. > + */ > + HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, > }; > > /* HCI device flags */ > diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c > index 8d33aa64846b1c..434c6878fe9640 100644 > --- a/net/bluetooth/hci_core.c > +++ b/net/bluetooth/hci_core.c > @@ -619,7 +619,8 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt) > hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL); > } > > - if (hdev->commands[38] & 0x80) { > + if (hdev->commands[38] & 0x80 && > + !test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks)) {
if ((hdev->commands[38] && 0x80) && !test_bit(HCI_QUIRK_.., &hdev->quirks)) {
> /* Read LE Min/Max Tx Power*/ > hci_req_add(req, HCI_OP_LE_READ_TRANSMIT_POWER, > 0, NULL); >
Regards
Marcel
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