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Bluetooth: add quirk disabling LE Read Transmit Power

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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>
Reported-by: Orlando Chamberlain <redecorating@protonmail.com>
Tested-by: Orlando Chamberlain <redecorating@protonmail.com>
Link:
https://lore.kernel.org/r/4970a940-211b-25d6-edab-21a815313954@protonmail.com
Fixes: 7c395ea521 ("Bluetooth: Query LE tx power on startup")
Cc: stable@vger.kernel.org
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Aditya Garg 2021-12-02 12:41:59 +00:00 committed by Marcel Holtmann
parent 16ada83b9a
commit d2f8114f95
2 changed files with 11 additions and 1 deletions
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9
include/net/bluetooth/hci.h
View file

@ -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 */

3
net/bluetooth/hci_sync.c
View file

@ -3300,7 +3300,8 @@ static int hci_le_read_adv_tx_power_sync(struct hci_dev *hdev)
/* Read LE Min/Max Tx Power*/
static int hci_le_read_tx_power_sync(struct hci_dev *hdev)
{
if (!(hdev->commands[38] & 0x80))
if (!(hdev->commands[38] & 0x80) ||
test_bit(HCI_QUIRK_BROKEN_READ_TRANSMIT_POWER, &hdev->quirks))
return 0;
return __hci_cmd_sync_status(hdev, HCI_OP_LE_READ_TRANSMIT_POWER,