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wifi: mt76: mt7915: set mt76 specific PS flag

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mt76 tracks the PSM state of a sta internally with a wcid flag. TX to
such clients is skipped based on the presence of this flag.

This flag was not added to the PS state notify handler for MT7915 chips.
Without this flag, mt76 queues pending frames to the hardware,
accounting for airtime when a PSM notification is received while in a TX
iteration.

Set the PS flag for the STA WCID to prevent this from happening. TX gets
skipped in presence of this flag.

Link: https://patchwork.kernel.org/project/linux-wireless/patch/20260313112502.2026974-1-mail@david-bauer.net/

Signed-off-by: David Bauer <mail@david-bauer.net>
This commit is contained in:
David Bauer 2026-03-15 17:47:15 +01:00
parent 7d2c244646
commit 045deec7e9
2 changed files with 43 additions and 1 deletions
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2
package/kernel/mt76/Makefile
View file

@ -1,7 +1,7 @@
include $(TOPDIR)/rules.mk
PKG_NAME:=mt76
PKG_RELEASE=1
PKG_RELEASE=2
PKG_LICENSE:=BSD-3-Clause-Clear
PKG_LICENSE_FILES:=

42
package/kernel/mt76/patches/0001-wifi-mt76-mt7915-set-mt76-specific-PS-flag.patch Normal file
View file

@ -0,0 +1,42 @@
From e78688a4f44478a9270813ac494fc548ed6b3be9 Mon Sep 17 00:00:00 2001
From: David Bauer <mail@david-bauer.net>
Date: Fri, 13 Mar 2026 12:19:37 +0100
Subject: [PATCH] wifi: mt76: mt7915: set mt76 specific PS flag
mt76 tracks the PSM state of a sta internally with a wcid flag. TX to
such clients is skipped based on the presence of this flag.
This flag was not added to the PS state notify handler for MT7915 chips.
Without this flag, mt76 queues pending frames to the hardware,
accounting for airtime when a PSM notification is received while in a TX
iteration.
Set the PS flag for the STA WCID to prevent this from happening. TX gets
skipped in presence of this flag.
Link: https://patchwork.kernel.org/project/linux-wireless/patch/20260313112502.2026974-1-mail@david-bauer.net/
Signed-off-by: David Bauer <mail@david-bauer.net>
---
mt7915/mcu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/mt7915/mcu.c b/mt7915/mcu.c
index 6625f905..52c89d2b 100644
--- a/mt7915/mcu.c
+++ b/mt7915/mcu.c
@@ -421,6 +421,11 @@ static void mt7915_mcu_rx_ps_sync(struct mt7915_dev *dev, struct sk_buff *skb)
if (!sta)
goto out;
+ if (p->ps_bit)
+ set_bit(MT_WCID_FLAG_PS, &wcid->flags);
+ else
+ clear_bit(MT_WCID_FLAG_PS, &wcid->flags);
+
ieee80211_sta_ps_transition_ni(sta, !!p->ps_bit);
out:
--
2.51.0