[PATCH v2 1/2] mac80211: check requested flags in ieee80211_tx_prepare_skb()

[PATCH v2 1/2] mac80211: check requested flags in ieee80211_tx_prepare_skb()

[Janusz Dziedzic]

In case driver already set info->flags (eg. IEEE80211_TX_CTL_NO_CCK_RATE
in ath9k driver), before this patch we skip this requested flags.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
---
 net/mac80211/tx.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index a512c4b..6ea1c65 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1532,6 +1532,7 @@ bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_tx_data tx;
 	struct sk_buff *skb2;
+	unsigned int flags = info->flags;
 
 	if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
 		return false;
@@ -1539,6 +1540,7 @@ bool ieee80211_tx_prepare_skb(struct ieee80211_hw *hw,
 	info->band = band;
 	info->control.vif = vif;
 	info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
+	info->flags |= flags;
 
 	if (invoke_tx_handlers(&tx))
 		return false;
-- 
1.9.1

[PATCH v2 2/2] ath9k: use min rate when MCC and nullfunc

[Janusz Dziedzic]

In case of nullfunc and MCC case use lowest
possible rates.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
---
 drivers/net/wireless/ath/ath9k/channel.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/wireless/ath/ath9k/channel.c b/drivers/net/wireless/ath/ath9k/channel.c
index b81f65c..988c859 100644
--- a/drivers/net/wireless/ath/ath9k/channel.c
+++ b/drivers/net/wireless/ath/ath9k/channel.c
@@ -1155,6 +1155,7 @@ ath_chanctx_send_vif_ps_frame(struct ath_softc *sc, struct ath_vif *avp,
 
 		skb->priority = 7;
 		skb_set_queue_mapping(skb, IEEE80211_AC_VO);
+		IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
 		if (!ieee80211_tx_prepare_skb(sc->hw, vif, skb, band, &sta)) {
 			dev_kfree_skb_any(skb);
 			return false;
-- 
1.9.1

Re: [PATCH v2 2/2] ath9k: use min rate when MCC and nullfunc

[Kalle Valo]

Janusz Dziedzic <janusz.dziedzic@tieto.com> writes:

> In case of nullfunc and MCC case use lowest
> possible rates.
>
> Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>

So what should I do with this patch? The mac80211 patch from this series
was dropped, should I do the same?

https://patchwork.kernel.org/patch/7953631/

Also please try to keep driver and mac80211 patches separate, that's
easier for me and Johannes.

-- 
Kalle Valo

Re: [PATCH v2 1/2] mac80211: check requested flags in ieee80211_tx_prepare_skb()

[Johannes Berg]

On Tue, 2016-01-05 at 11:35 +0100, Janusz Dziedzic wrote:
> In case driver already set info->flags (eg.
> IEEE80211_TX_CTL_NO_CCK_RATE
> in ath9k driver), before this patch we skip this requested flags.

I don't see how we "skip" them?

> +	unsigned int flags = info->flags;
>  
>  	if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
>  		return false;
> 
>  	info->band = band;
>  	info->control.vif = vif;
>  	info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
> +	info->flags |= flags;

tx_prepare() doesn't [seem to] do anything to the flags but twiddle a
few, so ?

johannes

Re: [PATCH v2 1/2] mac80211: check requested flags in ieee80211_tx_prepare_skb()

[Janusz Dziedzic]

On 6 January 2016 at 11:44, Johannes Berg <johannes@sipsolutions.net> wrote:
> On Tue, 2016-01-05 at 11:35 +0100, Janusz Dziedzic wrote:
>> In case driver already set info->flags (eg.
>> IEEE80211_TX_CTL_NO_CCK_RATE
>> in ath9k driver), before this patch we skip this requested flags.
>
> I don't see how we "skip" them?
>
>> +     unsigned int flags = info->flags;
>>
>>       if (ieee80211_tx_prepare(sdata, &tx, NULL, skb) == TX_DROP)
>>               return false;
>>
>>       info->band = band;
>>       info->control.vif = vif;
>>       info->hw_queue = vif->hw_queue[skb_get_queue_mapping(skb)];
>> +     info->flags |= flags;
>
> tx_prepare() doesn't [seem to] do anything to the flags but twiddle a
> few, so ?
>
Yes, you right - this patch is not needed.
Thanks.

BR
Janusz