mac80211: replace the previous fix with a revert of the faulty upstream commit

This avoids potential breakage in rt2x00usb

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 28 insertions, 0 deletions

diff --git a/package/kernel/mac80211/patches/321-Revert-mac80211-allow-using-AP_LINK_PS-with-mac80211.patch b/package/kernel/mac80211/patches/321-Revert-mac80211-allow-using-AP_LINK_PS-with-mac80211.patch
new file mode 100644
index 0000000..ace20e7
--- /dev/null
+++ b/package/kernel/mac80211/patches/321-Revert-mac80211-allow-using-AP_LINK_PS-with-mac80211.patch
@@ -0,0 +1,28 @@
+From: Felix Fietkau <nbd@nbd.name>
+Date: Thu, 3 Nov 2016 12:10:34 +0100
+Subject: [PATCH] Revert "mac80211: allow using AP_LINK_PS with
+ mac80211-generated TIM IE"
+
+This reverts commit c68df2e7be0c1238ea3c281fd744a204ef3b15a0.
+
+__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>
+---
+
+--- a/net/mac80211/sta_info.c
++++ b/net/mac80211/sta_info.c
+@@ -688,7 +688,7 @@ static void __sta_info_recalc_tim(struct
+ 	}
+ 
+ 	/* No need to do anything if the driver does all */
+-	if (!local->ops->set_tim)
++	if (ieee80211_hw_check(&local->hw, AP_LINK_PS))
+ 		return;
+ 
+ 	if (sta->dead)