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| author | Jian-Hong Pan <jian-hong@endlessm.com> | 2019-06-25 11:30:51 +0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2019-07-06 13:32:50 +0300 |
| commit | 7af3f558aca74f2ee47b173f1c27f6bb9a5b5561 (patch) | |
| tree | aa560c8fe725702f772da427c407e98afffcf3fb /drivers/bluetooth/btrtl.c | |
| parent | 6322f377bc4a0e3dac040c1c6d01761514f42187 (diff) | |
| download | linux-7af3f558aca74f2ee47b173f1c27f6bb9a5b5561.tar.xz | |
Bluetooth: btrtl: HCI reset on close for Realtek BT chip
Realtek RTL8822BE BT chip on ASUS X420FA cannot be turned on correctly
after on-off several times. Bluetooth daemon sets BT mode failed when
this issue happens. Scanning must be active while turning off for this
bug to be hit.
bluetoothd[1576]: Failed to set mode: Failed (0x03)
If BT is turned off, then turned on again, it works correctly again.
According to the vendor driver, the HCI_QUIRK_RESET_ON_CLOSE flag is set
during probing. So, this patch makes Realtek's BT reset on close to fix
this issue.
Link: https://bugzilla.kernel.org/show_bug.cgi?id=203429
Signed-off-by: Jian-Hong Pan <jian-hong@endlessm.com>
Reviewed-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'drivers/bluetooth/btrtl.c')
| -rw-r--r-- | drivers/bluetooth/btrtl.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/bluetooth/btrtl.c b/drivers/bluetooth/btrtl.c index 208feef63de4..d04b443cad1f 100644 --- a/drivers/bluetooth/btrtl.c +++ b/drivers/bluetooth/btrtl.c @@ -637,6 +637,26 @@ int btrtl_setup_realtek(struct hci_dev *hdev) } EXPORT_SYMBOL_GPL(btrtl_setup_realtek); +int btrtl_shutdown_realtek(struct hci_dev *hdev) +{ + struct sk_buff *skb; + int ret; + + /* According to the vendor driver, BT must be reset on close to avoid + * firmware crash. + */ + skb = __hci_cmd_sync(hdev, HCI_OP_RESET, 0, NULL, HCI_INIT_TIMEOUT); + if (IS_ERR(skb)) { + ret = PTR_ERR(skb); + bt_dev_err(hdev, "HCI reset during shutdown failed"); + return ret; + } + kfree_skb(skb); + + return 0; +} +EXPORT_SYMBOL_GPL(btrtl_shutdown_realtek); + static unsigned int btrtl_convert_baudrate(u32 device_baudrate) { switch (device_baudrate) { |