mac80211: extend fast-xmit for more ciphers

When crypto is offloaded then in some cases it's all handled
by the device, and in others only some space for the IV must
be reserved in the frame. Handle both of these cases in the
fast-xmit path, up to a limit of 18 bytes of space for IVs.

Change-Id: I9987f7e467e6ea238cdd7d623462044e1db4005d
Signed-off-by: Johannes Berg <>
2 files changed