From patchwork Wed Dec 5 22:29:20 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: [3.5.y.z, extended, stable] Patch "cfg80211: fix antenna gain handling" has been added to staging queue Date: Wed, 05 Dec 2012 12:29:20 -0000 From: Herton Ronaldo Krzesinski X-Patchwork-Id: 203983 Message-Id: <1354746560-20449-1-git-send-email-herton.krzesinski@canonical.com> To: Felix Fietkau Cc: kernel-team@lists.ubuntu.com, Johannes Berg This is a note to let you know that I have just added a patch titled cfg80211: fix antenna gain handling to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree which can be found at: http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue If you, or anyone else, feels it should not be added to this tree, please reply to this email. For more information about the 3.5.y.z tree, see https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable Thanks. -Herton ------ >From 87351082a805fa0213bd8e5cf9f83d51fe75ac18 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 17 Oct 2012 13:56:19 +0200 Subject: [PATCH] cfg80211: fix antenna gain handling X-Extended-Stable: 3.5 commit c4a9fafc77a5318f5ed26c509bbcddf03e18c201 upstream. 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 Signed-off-by: Johannes Berg Signed-off-by: Herton Ronaldo Krzesinski --- net/wireless/core.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) -- 1.7.9.5 diff --git a/net/wireless/core.c b/net/wireless/core.c index e98ab2f..3f514b6 100644 --- a/net/wireless/core.c +++ b/net/wireless/core.c @@ -548,8 +548,7 @@ 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;