linux-kernel - Re: [PATCH 3/3] libertas_tf: get the MAC address before registering the device

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Date:   Mon, 11 Feb 2019 06:11:40 -0800
From:   Steve deRosier <derosier@...il.com>
To:     Lubomir Rintel <lkundrak@...sk>
Cc:     Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] libertas_tf: get the MAC address before registering
 the device

On Sun, Feb 10, 2019 at 11:52 AM Lubomir Rintel <lkundrak@...sk> wrote:
>
> The start() callback is too late for this: NetworkManager would already
> have seen the hardware, thinking 00:00:00:00:00:00 is its permanent
> address.
>
> Signed-off-by: Lubomir Rintel <lkundrak@...sk>
> ---
>  .../net/wireless/marvell/libertas_tf/main.c   | 57 ++++---------------
>  1 file changed, 11 insertions(+), 46 deletions(-)
>
> diff --git a/drivers/net/wireless/marvell/libertas_tf/main.c b/drivers/net/wireless/marvell/libertas_tf/main.c
> index b4bd3047eb4e..da53da71987e 100644
> --- a/drivers/net/wireless/marvell/libertas_tf/main.c
> +++ b/drivers/net/wireless/marvell/libertas_tf/main.c
> @@ -125,37 +125,6 @@ static void lbtf_cmd_work(struct work_struct *work)
>         lbtf_deb_leave(LBTF_DEB_CMD);
>  }
>
> -/**
> - *  lbtf_setup_firmware: initialize firmware.
> - *
> - *  @priv    A pointer to struct lbtf_private structure
> - *
> - *  Returns: 0 on success.
> - */
> -static int lbtf_setup_firmware(struct lbtf_private *priv)
> -{
> -       int ret = -1;
> -
> -       lbtf_deb_enter(LBTF_DEB_FW);
> -       /*
> -        * Read priv address from HW
> -        */
> -       eth_broadcast_addr(priv->current_addr);
> -       ret = lbtf_update_hw_spec(priv);
> -       if (ret) {
> -               ret = -1;
> -               goto done;
> -       }
> -
> -       lbtf_set_mac_control(priv);
> -       lbtf_set_radio_control(priv);
> -
> -       ret = 0;
> -done:
> -       lbtf_deb_leave_args(LBTF_DEB_FW, "ret: %d", ret);
> -       return ret;
> -}
> -
>  /**
>   *  This function handles the timeout of command sending.
>   *  It will re-send the same command again.
> @@ -289,30 +258,17 @@ static void lbtf_tx_work(struct work_struct *work)
>  static int lbtf_op_start(struct ieee80211_hw *hw)
>  {
>         struct lbtf_private *priv = hw->priv;
> -       int ret = -1;
>
>         lbtf_deb_enter(LBTF_DEB_MACOPS);
>
> -       /* poke the firmware */
>         priv->capability = WLAN_CAPABILITY_SHORT_PREAMBLE;
>         priv->radioon = RADIO_ON;
>         priv->mac_control = CMD_ACT_MAC_RX_ON | CMD_ACT_MAC_TX_ON;
> -       ret = lbtf_setup_firmware(priv);
> -       if (ret)
> -               goto err_setup_firmware;
> -
> -       if ((priv->fwrelease < LBTF_FW_VER_MIN) ||
> -           (priv->fwrelease > LBTF_FW_VER_MAX)) {
> -               ret = -1;
> -               goto err_setup_firmware;
> -       }
> +       lbtf_set_mac_control(priv);
> +       lbtf_set_radio_control(priv);
>
>         lbtf_deb_leave(LBTF_DEB_MACOPS);
>         return 0;
> -
> -err_setup_firmware:
> -       lbtf_deb_leave_args(LBTF_DEB_MACOPS, "fw setup error; ret=%d", ret);
> -       return ret;
>  }
>
>  static void lbtf_op_stop(struct ieee80211_hw *hw)
> @@ -649,6 +605,15 @@ struct lbtf_private *lbtf_add_card(void *card, struct device *dmdev,
>                 goto err_init_adapter;
>         }
>
> +       eth_broadcast_addr(priv->current_addr);
> +       if (lbtf_update_hw_spec(priv))
> +               goto err_init_adapter;
> +
> +       if (priv->fwrelease < LBTF_FW_VER_MIN ||
> +           priv->fwrelease > LBTF_FW_VER_MAX) {
> +               goto err_init_adapter;
> +       }
> +
>         /* The firmware seems to start with the radio enabled. Turn it
>          * off before an actual mac80211 start callback is invoked.
>          */
> --
> 2.20.1
>

Reviewed-by: Steve deRosier <derosier@...-sierra.com>