linux-kernel - Re: [PATCH RESEND 0/3] Add quirk for reading BD

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Date:   Mon, 18 Feb 2019 11:48:21 +0100
From:   Marcel Holtmann <marcel@...tmann.org>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     Johan Hedberg <johan.hedberg@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Loic Poulain <loic.poulain@...aro.org>,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org,
        Balakrishna Godavarthi <bgodavar@...eaurora.org>
Subject: Re: [PATCH RESEND 0/3] Add quirk for reading BD_ADDR from fwnode
 property

Hi Matthias,

> [initial post: https://lore.kernel.org/patchwork/cover/1028184/]
> 
> On some systems the Bluetooth Device Address (BD_ADDR) isn't stored
> on the Bluetooth chip itself. One way to configure the address is
> through the device tree (patched in by the bootloader). The btqcomsmd
> driver is an example, it can read the address from the DT property
> 'local-bd-address'.
> 
> To avoid redundant open-coded reading of 'local-bd-address' and error
> handling this series adds the quirk HCI_QUIRK_USE_BDADDR_PROPERTY to
> retrieve the BD address of a device from the DT and adapts the
> btqcomsmd and hci_qca drivers to use this quirk.
> 
> Matthias Kaehlcke (3):
>  Bluetooth: Add quirk for reading BD_ADDR from fwnode property
>  Bluetooth: btqcomsmd: use HCI_QUIRK_USE_BDADDR_PROPERTY
>  Bluetooth: hci_qca: Set HCI_QUIRK_USE_BDADDR_PROPERTY for wcn3990
> 
> drivers/bluetooth/btqcomsmd.c | 29 +++--------------------
> drivers/bluetooth/hci_qca.c   |  1 +
> include/net/bluetooth/hci.h   | 12 ++++++++++
> net/bluetooth/hci_core.c      | 43 +++++++++++++++++++++++++++++++++++
> net/bluetooth/mgmt.c          |  6 +++--
> 5 files changed, 63 insertions(+), 28 deletions(-)

I am getting compiler warnings when trying to apply this set:

  CC      drivers/bluetooth/btqcomsmd.o
drivers/bluetooth/btqcomsmd.c: In function ‘btqcomsmd_setup’:
drivers/bluetooth/btqcomsmd.c:120:6: warning: unused variable ‘err’ [-Wunused-variable]
  int err;
      ^~~
drivers/bluetooth/btqcomsmd.c:118:20: warning: unused variable ‘btq’ [-Wunused-variable]
  struct btqcomsmd *btq = hci_get_drvdata(hdev);
                    ^~~

Regards

Marcel