diff options
| author | Gertjan van Wingerde <gwingerde@gmail.com> | 2010-10-10 19:25:33 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-05-09 15:55:22 -0700 |
| commit | 2b5f7f94872ef2ed281783017e1a6ac787b8c107 (patch) | |
| tree | c4b62532a8d4526168b97660f31b3a14cb53b3d2 /net | |
| parent | 5e93019e4a06ade55e91010371ee22a218190567 (diff) | |
mac80211: Add define for TX headroom reserved by mac80211 itself.
commit d24deb2580823ab0b8425790c6f5d18e2ff749d8 upstream.
Add a definition of the amount of TX headroom reserved by mac80211 itself
for its own purposes. Also add BUILD_BUG_ON to validate the value.
This define can then be used by drivers to request additional TX headroom
in the most efficient manner.
Signed-off-by: Gertjan van Wingerde <gwingerde@gmail.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[bwh: Adjust context for 2.6.32]
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'net')
| -rw-r--r-- | net/mac80211/main.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/mac80211/main.c b/net/mac80211/main.c index 19fbd25a705..2dfe1768e2a 100644 --- a/net/mac80211/main.c +++ b/net/mac80211/main.c @@ -859,6 +859,8 @@ int ieee80211_register_hw(struct ieee80211_hw *hw) * and we need some headroom for passing the frame to monitor * interfaces, but never both at the same time. */ + BUILD_BUG_ON(IEEE80211_TX_STATUS_HEADROOM != + sizeof(struct ieee80211_tx_status_rtap_hdr)); local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, sizeof(struct ieee80211_tx_status_rtap_hdr)); |