1. 21 May, 2008 1 commit
  2. 14 May, 2008 1 commit
    • Johannes Berg's avatar
      mac80211: proper STA info locking · 07346f81
      Johannes Berg authored
      
      
      As discussed earlier, we can unify locking in struct sta_info
      and use just a single spinlock protecting all members of the
      structure that need protection. Many don't, but one of the
      especially bad ones is the 'flags' member that can currently
      be clobbered when RX and TX is being processed on different
      CPUs at the same time.
      
      Because having four spinlocks for different, mostly exclusive
      parts of a single structure is overkill, this patch also kills
      the ampdu and mesh plink spinlocks and uses just a single one
      for everything. Because none of the spinlocks are nested, this
      is safe.
      
      It remains to be seen whether or not we should make the sta
      flags use atomic bit operations instead, for now though this
      is a safe thing and using atomic operations instead will be
      very simple using the new static inline functions this patch
      introduces for accessing sta->flags.
      
      Since spin_lock_bh() is used with this lock, there shouldn't
      be any contention even if aggregation is enabled at around the
      same time as both requires frame transmission/reception which
      is in a bh context.
      
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Cc: Tomas Winkler <tomasw@gmail.com>
      Cc: Ron Rindjunsky <ron.rindjunsky@intel.com>
      Cc: Luis Carlos Cobo <luisca@cozybit.com>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      07346f81
  3. 16 Apr, 2008 2 commits
  4. 08 Apr, 2008 2 commits
    • Johannes Berg's avatar
      mac80211: rename files · 2c8dccc7
      Johannes Berg authored
      
      
      This patch renames all mac80211 files (except ieee80211_i.h) to get rid
      of the useless ieee80211_ prefix.
      
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      2c8dccc7
    • Johannes Berg's avatar
      mac80211: fix key vs. sta locking problems · 3b96766f
      Johannes Berg authored
      
      
      Up to now, key manipulation is supposed to run under RTNL to
      avoid concurrent manipulations and also allow the set_key()
      hardware callback to sleep. This is not feasible because STA
      structs are rcu-protected and thus a lot of operations there
      cannot take the RTNL. Also, key references are rcu-protected
      so we cannot do things atomically.
      
      This patch changes key locking completely:
       * key operations are now atomic
       * hardware crypto offload is enabled and disabled from
         a workqueue, due to that key freeing is also delayed
       * debugfs code is also run from a workqueue
       * keys reference STAs (and vice versa!) so during STA
         unlink the STAs key reference is removed but not the
         keys STA reference, to avoid races key todo work is
         run before STA destruction.
       * fewer STA operations now need the RTNL which was
         required due to key operations
      
      This fixes the locking problems lockdep pointed out and also
      makes things more light-weight because the rtnl isn't required
      as much.
      
      Note that the key todo lock/key mutex are global locks, this
      is not required, of course, they could be per-hardware instead.
      
      Signed-off-by: default avatarJohannes Berg <johannes@sipsolutions.net>
      Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
      3b96766f
  5. 01 Apr, 2008 2 commits
  6. 06 Mar, 2008 8 commits
  7. 29 Feb, 2008 5 commits
  8. 28 Jan, 2008 6 commits
  9. 10 Oct, 2007 5 commits
  10. 05 May, 2007 1 commit