mac80211: disable power save when scanning

When software scanning we need to disable power save so that all possible
probe responses and beacons are received. For hardware scanning assume that
hardware will take care of that and document that assumption.

Signed-off-by: Kalle Valo <kalle.valo@nokia.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 7 insertions, 5 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index daa539a4287b..174dc1d7526b 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1307,11 +1307,13 @@ enum ieee80211_ampdu_mlme_action {
  *
  * @hw_scan: Ask the hardware to service the scan request, no need to start
  *      the scan state machine in stack. The scan must honour the channel
- *      configuration done by the regulatory agent in the wiphy's registered
- *      bands. When the scan finishes, ieee80211_scan_completed() must be
- *      called; note that it also must be called when the scan cannot finish
- *      because the hardware is turned off! Anything else is a bug!
- *      Returns a negative error code which will be seen in userspace.
+ *      configuration done by the regulatory agent in the wiphy's
+ *      registered bands. The hardware (or the driver) needs to make sure
+ *      that power save is disabled. When the scan finishes,
+ *      ieee80211_scan_completed() must be called; note that it also must
+ *      be called when the scan cannot finish because the hardware is
+ *      turned off! Anything else is a bug! Returns a negative error code
+ *      which will be seen in userspace.
  *
  * @sw_scan_start: Notifier function that is called just before a software scan
  *      is started. Can be NULL, if the driver doesn't need this notification.