tree 07e1cacc2db49e3a7534e4d012e75e96f5ad0d45
parent ad82d8a5366fc3f84ea9ee0fa417cdfb42b28ec8
author Emmanuel Grumbach <emmanuel.grumbach@intel.com> 1421766160 +0200
committer Emmanuel Grumbach <emmanuel.grumbach@intel.com> 1426147063 +0200

iwlwifi: pcie: allow the op_mode to freeze the stuck queue timer

This allows the op_mode to let the transport know that a
queue is currently frozen and that its timer should be
stopped.
When the queue is unfrozen, its timer should be set to
expire after the remainder of the timeout has elapsed.
This can be used when stations go to sleep. When a station
goes to sleep, the op_mode can freeze the timer so that the
queue will never be considered as stuck. When the station
wakes up, the queue will be unfrozen.
This is meant to avoid false positives that would happen if
a buggy station goes to sleep for a very long time. In case
we have a dedicated queue for this station (BA agreement)
and it goes to sleep for a very long time, the queue would
rightfully be stopped during all that time. In this case,
the stuck queue timer could fire and that would be a false
positive.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>