On 06/29/2012 02:56 PM, Thomas Huehn wrote:
> brcmsmac uses info->control.sta while doing ampdu aggregation. This patch
> changes the usage of the structure info->control.sta, as it is going to be
> removed soon from struct ieee80211_tx_info. This patch is a pre-requisit in
> order to add transmission power control (TPC) to the mac80211 subsystem.
>
> Suggested-by: Felix Fietkau <nbd@xxxxxxxxxxx>
> Signed-off-by: Thomas Huehn <thomas@xxxxxxxxxxxxxxxxxxxxxxx>
> ---
> Change sequence of overwriting data. Thx to Johannes.
> ---
> drivers/net/wireless/brcm80211/brcmsmac/ampdu.c | 10 +++++-----
> drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c | 2 ++
> drivers/net/wireless/brcm80211/brcmsmac/main.c | 2 +-
> 3 files changed, 8 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c b/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c
> index 01b190a..d341c91 100644
> --- a/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c
> +++ b/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c
> @@ -665,7 +665,7 @@ brcms_c_sendampdu(struct ampdu_info *ampdu, struct brcms_txq_info *qi,
> u8 plcp0, plcp3, is40, sgi;
> struct ieee80211_sta *sta;
>
> - sta = tx_info->control.sta;
> + sta = tx_info->rate_driver_data[0];
The sta pointer is not used in this function so this assignment is not
needed. Also the rate_driver_data[0] does not yet hold the sta pointer
upon reaching this function. brcms_c_sendampdu is called from
brcms_c_sendpkt_mac80211 (see below).
Just remove the sta pointer here.
> diff --git a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
> index 2d5a404..f3ab8a6 100644
> --- a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
> +++ b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
> @@ -267,6 +267,7 @@ static void brcms_set_basic_rate(struct brcm_rateset *rs, u16 rate, bool is_br)
> static void brcms_ops_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
> {
> struct brcms_info *wl = hw->priv;
> + struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
>
> spin_lock_bh(&wl->lock);
> if (!wl->pub->up) {
> @@ -275,6 +276,7 @@ static void brcms_ops_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
> goto done;
> }
> brcms_c_sendpkt_mac80211(wl->wlc, skb, hw);
> + tx_info->rate_driver_data[0] = tx_info->control.sta;
> done:
> spin_unlock_bh(&wl->lock);
> }
Gr. AvS
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