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Re: [RFC/RFT 1/2] mac80211: Add NEED_ALIGNED4_SKBS hw flag

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On 2015-12-17 10:20, Janusz Dziedzic wrote:
> HW/driver should set NEED_ALIGNED4_SKBS flag in case require
> aligned skbs to four-byte boundaries.
> 
> Before we have to do memmove() in the driver before
> pass this to HW and memmove() back in tx completion.
> This patch allow to save CPU and skip such memmoves.
> For each skb we called memmove(ieee80211_hdrsize()) twice.
> 
> Currently this was tested with ath9k, both hw/sw crypt for
> tkip/ccmp.
> For sure more tests required.
> 
> Signed-off-by: Janusz Dziedzic <janusz.dziedzic@xxxxxxxxx>
Nice. By the way, this alignment requirement is not ath9k specific -
mt76 (currently out-of-tree), mt7601u and rt2x00 can use this as well.

- Felix
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