mac80211: fix contention time computation in minstrel, minstrel_ht
authorDaniel Halperin <dhalperi@cs.washington.edu>
Wed, 11 May 2011 02:00:45 +0000 (19:00 -0700)
committerJohn W. Linville <linville@tuxdriver.com>
Thu, 12 May 2011 18:10:48 +0000 (14:10 -0400)
commit8fddddff0ad4ccc2787464207eba9ed3063e69cd
tree6f219c46e9fdae5df766deb784c3cfc00e3e4106
parent56d1893d94bc06d0b1aa3a53f924ed02f9e207bf
mac80211: fix contention time computation in minstrel, minstrel_ht

When transmitting a frame, the transmitter waits a random number of
slots between 0 and cw. Thus, the contention time is (cw / 2) * t_slot
which we can represent instead as (cw * t_slot) >> 1. Also fix a few
other accounting bugs around contention time, and add comments.

Signed-off-by: Daniel Halperin <dhalperi@cs.washington.edu>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
net/mac80211/rc80211_minstrel.c
net/mac80211/rc80211_minstrel_ht.c