Re: [PATCH 2/2] ath9k: Fix stop in tx date traffic after scan

[Vasanthakumar Thiagarajan <vasanth@atheros.com>]

On Thu, Jul 22, 2010 at 03:44:54PM +0530, Johannes Berg wrote:
> On Thu, 2010-07-22 at 15:41 +0530, Vasanthakumar Thiagarajan wrote:
> > > Just go and implement flush() and all these issues will go away and you
> > > will stop thinking that you need to touch queues from channel switching.
> > > They have nothing to do with each other.
> > 
> > 
> > I thought about it also, but i'll hit the same issue 
> > when ieee80211_scan_state_leave_oper_channel() flushes
> > the hw tx queues where driver is not supposed to wake
> > up the queues as drv_flush() is called only after stopping
> > all queues.
> 
> I don't get it. The driver can start/stop queues at _any_ time it wants
> to. Regardless of what mac80211 is doing, all that goes via
> IEEE80211_QUEUE_STOP_REASON_DRIVER which is never touched by mac80211
> itself.

My understanding is, if driver wakes up the queues when operating on
a off-channel, it would get data frames from upper layer for
transmission but it should not send out these frames as the hw is on
non-operating channel.

Vasanth