From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1D4F821C187; Tue, 12 Aug 2025 19:11:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755025899; cv=none; b=tL8KNYgriYEJWao+6pEk/8HLMzM6hTWm0LdfvBFMzOsFYuqiClD8dCUVp2GRHUaceGIPjoY2bOKUnUG7iQzsxu2Fh6tZ6kfhbA38+CTb7Z8OEja2YtsAOhmP6R6dedyxwTSkRX1xQuYfxmhnMczur1561IwkzmmMeDzam4gNBic= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755025899; c=relaxed/simple; bh=Kr69zzqoZ4QrmULUMrG+rib5Vky6GoELG02DR76TUNA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YcFVuqVpW6+aLnaQQRC1UuQvmg5BvzE0FuvqajG58znkvCgob8hUu81zec1PZyG6slkIp4VV8slKMBezKm80vH4qRvKIKGTgyo+oyQJ76D12cgfOBTZRnGzPlL/8w3jdYXZoH6FbgKP40ZbIMimuinUxUK9f5Cjxsx4zpaaweik= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=fF/AY04m; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="fF/AY04m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9C8C7C4CEF0; Tue, 12 Aug 2025 19:11:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755025899; bh=Kr69zzqoZ4QrmULUMrG+rib5Vky6GoELG02DR76TUNA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fF/AY04m6SfpbFazk59WALz2M+HVvyjHvAxxSh4Wl8wzJh3PK97vD76WpcnQRvYkV RrO8vgWIM9nTex+y69cvZAGsu8/tyUBTCOWwdASHu6wf0fTPYzi4iwpeDkSjScBKrI 0ia/yyF6yz1vvz76LJteEivQ2LN3S/lNH5Z9oxas= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Alexander Wetzel , Johannes Berg , Sasha Levin Subject: [PATCH 6.15 177/480] wifi: mac80211: Do not schedule stopped TXQs Date: Tue, 12 Aug 2025 19:46:25 +0200 Message-ID: <20250812174404.814733318@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250812174357.281828096@linuxfoundation.org> References: <20250812174357.281828096@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alexander Wetzel [ Upstream commit 11e3e22fa533f5d7cf04e32343b05a27eda3c7a5 ] Ignore TXQs with the flag IEEE80211_TXQ_STOP when scheduling a queue. The flag is only set after all fragments have been dequeued and won't allow dequeueing other frames as long as the flag is set. For drivers using ieee80211_txq_schedule_start() this prevents an loop trying to push the queued frames while IEEE80211_TXQ_STOP is set: After setting IEEE80211_TXQ_STOP the driver will call ieee80211_return_txq(). Which calls __ieee80211_schedule_txq(), detects that there sill are frames in the queue and immediately restarts the stopped TXQ. Which can't dequeue any frame and thus starts over the loop. Signed-off-by: Alexander Wetzel Fixes: ba8c3d6f16a1 ("mac80211: add an intermediate software queue implementation") Link: https://patch.msgid.link/20250717162547.94582-2-Alexander@wetzel-home.de Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/tx.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index 695db38ccfb4..fd21a18a028d 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -4109,7 +4109,9 @@ void __ieee80211_schedule_txq(struct ieee80211_hw *hw, spin_lock_bh(&local->active_txq_lock[txq->ac]); - has_queue = force || txq_has_queue(txq); + has_queue = force || + (!test_bit(IEEE80211_TXQ_STOP, &txqi->flags) && + txq_has_queue(txq)); if (list_empty(&txqi->schedule_order) && (has_queue || ieee80211_txq_keep_active(txqi))) { /* If airtime accounting is active, always enqueue STAs at the -- 2.39.5