Commit c4a9fafc authored Oct 17, 2012 by Felix Fietkau Committed by Johannes Berg Oct 18, 2012

cfg80211: fix antenna gain handling



No driver initializes chan->max_antenna_gain to something sensible, and
the only place where it is being used right now is inside ath9k. This
leads to ath9k potentially using less tx power than it can use, which can
decrease performance/range in some rare cases.

Rather than going through every single driver, this patch initializes
chan->orig_mag in wiphy_register(), ignoring whatever value the driver
left in there. If a driver for some reason wishes to limit it independent
from regulatory rulesets, it can do so internally.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

parent 3a40414f

net/wireless/core.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -526,8 +526,7 @@ int wiphy_register(struct wiphy *wiphy)
		for (i = 0; i < sband->n_channels; i++) {
		sband->channels[i].orig_flags =
		sband->channels[i].flags;
		sband->channels[i].orig_mag =
		sband->channels[i].max_antenna_gain;
		sband->channels[i].orig_mag = INT_MAX;
		sband->channels[i].orig_mpwr =
		sband->channels[i].max_power;
		sband->channels[i].band = band;

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