mac80211: add support for tx to abort low priority scan requests

Use NL80211_SCAN_FLAG_LOW_PRIORITY flag in mac80211's scan state
machine to prematurely terminate scan operations if outbound
traffic collides. This is useful for marking background scans so
they don't affect throughput.

Signed-off-by: Sam Leffler <sleffler@chromium.org>
Signed-off-by: Amitkumar Karwar <akarwar@marvell.com>
Signed-off-by: Bing Zhao <bzhao@marvell.com>
[set feature flag only if software scan is used]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index 931f14f3281f..ba5a23249771 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -602,6 +602,9 @@ struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len,
                            NL80211_FEATURE_SAE |
                            NL80211_FEATURE_HT_IBSS;
 
+        if (!ops->hw_scan)
+                wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN;
+
         if (!ops->set_key)
                 wiphy->flags |= WIPHY_FLAG_IBSS_RSN;