mac80211: Defer tranmission of mesh path errors

Under failure conditions, the mesh stack sends PERR messages to the
previous sender of the failed frame.  This happens in the tx feedback
path, in which the transmission queue lock may be taken.  Avoid a
deadlock by sending the path error via the pending queue.

v3: - Comment on headroom size (Johannes)
v2: - Prepare skb for deferred transmission (Johannes)
    - Reword comment (Johannes)

Signed-off-by: Javier Cardona <[email protected]>
Reviewed-by: Johannes Berg <[email protected]>

mac80211: Stop forwarding mesh traffic when tx queues are full

Tx flow control for non-mesh modes of operation only needs to act on the
net device queues: when the hardware queues are full we stop accepting
traffic from the net device.  In mesh, however, we also need to stop
forwarding traffic.  This patch checks the hardware queues before
attempting to forward a mesh frame.

Signed-off-by: Javier Cardona <[email protected]>

v2: Call ieee80211_queue_stopped, which acquires the queue lock
(Johannes)

mac80211: Mesh data frames must have the QoS header

Per sec 7.1.3.5 of draft 12.0 of 802.11s, mesh frames indicate the
presence of the mesh control header in their QoS header.

Signed-off-by: Javier Cardona <[email protected]>

wireless-testing 2011-08-30

Linux 3.1-rc4

wireless-testing 2011-08-29

wireless-testing 2011-08-26

wireless-testing 2011-08-24

wireless-testing 2011-08-23

Linux 3.1-rc3