[PATCH v2 3/5] ath10k: drain tx before restarting hw

[Johannes Berg]

On Fri, 2014-05-23 at 11:06 +0200, Michal Kazior wrote:

> There's nothing wrong with other thread holding it. Actually that's
> the reason for this very check.
> 
> The point is to prevent ath10k_drain_tx() being called while caller
> (current thread) holds conf_mutex. If it were to hold conf_mutex then
> cancel_work_sync() can deadlock as both workers it tries to stop try
> to get a hold of the lock too.

That seems pointless - lockdep would warn you about that *anyway*
because cancel_work_sync() and friends have proper annotations. Try it
sometime :)

johannes