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From: Felix Fietkau <nbd@nbd.name>
To: linux-wireless@vger.kernel.org
Cc: johannes@sipsolutions.net, emmanuel.grumbach@intel.com
Subject: [PATCH] mac80211: fix broken AP mode handling of powersave clients
Date: Thu,  3 Nov 2016 10:59:38 +0100	[thread overview]
Message-ID: <20161103095938.84054-1-nbd@nbd.name> (raw)

Commit c68df2e7be0c ("mac80211: allow using AP_LINK_PS with
mac80211-generated TIM IE") introduced a logic error, where
__sta_info_recalc_tim turns into a no-op if local->ops->set_tim is not
set. This prevents the beacon TIM bit from being set for all drivers
that do not implement this op (almost all of them), thus thoroughly
essential AP mode powersave functionality.

Cc: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Fixes: c68df2e7be0c ("mac80211: allow using AP_LINK_PS with mac80211-generated TIM IE")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
 net/mac80211/sta_info.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c
index 236d47e..621734e 100644
--- a/net/mac80211/sta_info.c
+++ b/net/mac80211/sta_info.c
@@ -688,7 +688,7 @@ static void __sta_info_recalc_tim(struct sta_info *sta, bool ignore_pending)
 	}
 
 	/* No need to do anything if the driver does all */
-	if (!local->ops->set_tim)
+	if (local->ops->set_tim)
 		return;
 
 	if (sta->dead)
-- 
2.10.1

             reply	other threads:[~2016-11-03  9:59 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-03  9:59 Felix Fietkau [this message]
2016-11-03 10:51 ` [PATCH] mac80211: fix broken AP mode handling of powersave clients Emmanuel Grumbach
2016-11-03 10:51   ` Emmanuel Grumbach
2016-11-03 11:08     ` Felix Fietkau
2016-11-03 11:10       ` Emmanuel Grumbach

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