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authorEliad Peller <eliad@wizery.com>2011-06-13 12:47:30 +0300
committerJohn W. Linville <linville@tuxdriver.com>2011-06-17 14:22:18 -0400
commitb856439b1b54358e580aaee5dbe683af5ada9403 (patch)
treedc38beee0a1585693fa228e33646dee5a37f456d /include
parenteb40e3e8bb453519ae17d42e7cab6bdd2b4b9fc5 (diff)
mac80211: add cancel_hw_scan() callback
When suspending, __ieee80211_suspend() calls ieee80211_scan_cancel(), which will only cancel sw scan. In order to cancel hw scan, the low-level driver has to cancel it in the suspend() callback. however, this is too late, as a new scan_work will be enqueued (while the driver is going into suspend). Add a new cancel_hw_scan() callback, asking the driver to cancel an active hw scan, and call it in ieee80211_scan_cancel(). Signed-off-by: Eliad Peller <eliad@wizery.com> Reviewed-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'include')
-rw-r--r--include/net/mac80211.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index e33fe795a3a4..120f102814b6 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1708,6 +1708,14 @@ enum ieee80211_ampdu_mlme_action {
* any error unless this callback returned a negative error code.
* The callback can sleep.
*
+ * @cancel_hw_scan: Ask the low-level tp cancel the active hw scan.
+ * The driver should ask the hardware to cancel the scan (if possible),
+ * but the scan will be completed only after the driver will call
+ * ieee80211_scan_completed().
+ * This callback is needed for wowlan, to prevent enqueueing a new
+ * scan_work after the low-level driver was already suspended.
+ * The callback can sleep.
+ *
* @sched_scan_start: Ask the hardware to start scanning repeatedly at
* specific intervals. The driver must call the
* ieee80211_sched_scan_results() function whenever it finds results.
@@ -1900,6 +1908,8 @@ struct ieee80211_ops {
u32 iv32, u16 *phase1key);
int (*hw_scan)(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
struct cfg80211_scan_request *req);
+ void (*cancel_hw_scan)(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif);
int (*sched_scan_start)(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct cfg80211_sched_scan_request *req,