tree d875681269e087e6a148593bb1d436849e642b7f
parent 5ee0865615f65f84e6ee9174771a6716c29e08e1
author Felix Fietkau <nbd@openwrt.org> 1280527920 +0200
committer John W. Linville <linville@tuxdriver.com> 1280950057 -0400

ath9k_hw: clean up per-channel calibration data

The noise floor history buffer is currently not kept per channel, which
can lead to problems when changing channels from a clean channel to a
noisy one. Also when switching from HT20 to HT40, the noise floor
history buffer is full of measurements, but none of them contain data
for the extension channel, which it needs quite a bit of time to recover
from.

This patch puts all the per-channel calibration data into a single data
structure, and gives the the driver control over whether that is used
per-channel or even not used for some channels.

For ath9k_htc, I decided to keep this per-channel in order to avoid
creating regressions.

For ath9k, the data is kept only for the operating channel, which saves
some space. ath9k_hw takes care of wiping old data when the operating
channel or its channel flags change.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>