Re: [PATCH] rtl8180: fix tx status reporting

[Adrian Bassett <Adrian.Bassett@hotmail.co.uk>]

John W. Linville <linville@...> writes:

> 
> When reporting Tx status, indicate that only one rate was used.
> Otherwise, the rate is frozen at rate index 0 (i.e. 1Mb/s).
> 
> Signed-off-by: John W. Linville <linville@...>
> ---
>  drivers/net/wireless/rtl818x/rtl8180_dev.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/net/wireless/rtl818x/rtl8180_dev.c
b/drivers/net/wireless/rtl818x/rtl8180_dev.c
> index d84ad05..8487327 100644
> --- a/drivers/net/wireless/rtl818x/rtl8180_dev.c
> +++ b/drivers/net/wireless/rtl818x/rtl8180_dev.c
> @@ -188,6 +188,7 @@ static void rtl8180_handle_tx(struct ieee80211_hw *dev,
unsigned int prio)
>  			info->flags |= IEEE80211_TX_STAT_ACK;
> 
>  		info->status.rates[0].count = (flags & 0xFF) + 1;
> +		info->status.rates[1].idx = -1;
> 
>  		ieee80211_tx_status_irqsafe(dev, skb);
>  		if (ring->entries - skb_queue_len(&ring->queue) == 2)

John,

I can confirm that this patch fixes the regression reported in the thread at
http://marc.info/?l=linux-wireless&m=123720659723688&w=2 so that the rtl8180
wireless driver and the minstrel rate controller now play together OK.  I would
endorse the suggestion that this patch is backported to stable.  Any chance of
late inclusion in 2.6.34?

Stats for info:

2.6.34-rc6-wl-00-47739-g27957c6

Rate control from /sys/kernel/debug/ieee80211/phy0/rc/name: minstrel

Stats from /sys/kernel/debug/ieee80211/phy0/stations/xx:xx:xx:xx:xx:xx/rc_stats

rate throughput  ewma prob   this prob  this succ/attempt   success    attempts
  P  1      0.9       98.1      100.0          0(  0)        137         142
     2      1.8       95.7      100.0          0(  0)         11          11
     5.5    4.8       95.7      100.0          0(  0)         11          11
    11      9.1       95.7      100.0          0(  0)         11          11
     6      5.4       95.9      100.0          0(  0)         18          20
     9      8.0       95.2      100.0          0(  0)         14          16
    12     10.5       95.3      100.0          0(  0)         13          14
    18     15.5       95.2      100.0          0(  0)         21          28
    24     20.3       95.4      100.0          0(  0)         65         110
 t  36     24.8       81.5      100.0          0(  0)        443         600
T   48     34.7       89.0      100.0          1(  1)       5348        6735
    54     17.8       41.1       25.0          0(  0)      16939       20381

Total packet count::    ideal 2794      lookaround 147


Thanks,

Adrian Bassett