From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 298273A8FEE for ; Thu, 17 Sep 2026 06:48:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789627724; cv=none; b=MQVS2XEZEVMaZC4lNyOUZFKf7Lp5sGbSCI76OnTEWXSdbcsAGwDWnypARYclJun2ueFUe9lo/IsNvUP9KI4t2uaFqrOgdAhhKObDdh+f+r9nk4Te0nF4qjTEsVfW6auQLT9wTA75P1CJ25iExEKTEaxIr6wfb6fnMZ18GfMph0w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789627724; c=relaxed/simple; bh=3jIIF/WOU9H2yQV04mRQjY74nmF7dGtB9JYdYQvm+1U=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=cO9ZlBCHQ7M5UnCroGHtiDvYfG3hezA78grBMhpN3LXn7dwHHVUfuK1714O6++gpfclkUMudwEgEV5euS3GfhmL7aW77oBwSfh8G6qyybpImV/sgBEZ11hrYmNS14YmtsOdOmhWI6e65frlb5L5Sm/xjd5Ag7+vehL3dxkGWrJA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=i8vKrf0F; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="i8vKrf0F" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1789627722; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=38XCC3pzzBeGcbj7BSYYe61HHKXklyzXx0gZrWcUPq4=; b=i8vKrf0FA+Oww7jZf2aSaZ/o+81HUPip+u0guErohTdPqjGglP/A8CrdK1zIzGYglVnt/x AqggsmWLoBGiew3kagSmWhhUmAu0pklXhIs32M1IL3P43VuJUhsuGhoYwtdjHeNXXLyNLN VDieqVk7vibeB7psWIJRNWyJxFf6wSk= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-623-L0mNYR8MM02UZed6OsDEtA-1; Thu, 17 Sep 2026 02:48:38 -0400 X-MC-Unique: L0mNYR8MM02UZed6OsDEtA-1 X-Mimecast-MFC-AGG-ID: L0mNYR8MM02UZed6OsDEtA_1789627717 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id F405E18CD2FA; Thu, 17 Sep 2026 06:48:30 +0000 (UTC) Received: from fedora.redhat.corp (headnet05.pony-001.prod.iad2.dc.redhat.com [10.2.32.117]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id B8AA23003EED; Thu, 17 Sep 2026 06:48:28 +0000 (UTC) From: Jose Ignacio Tornos Martinez To: jjohnson@kernel.org Cc: ath11k@lists.infradead.org, ath12k@lists.infradead.org, linux-wireless@vger.kernel.org, linux-kernel@vger.kernel.org, Jose Ignacio Tornos Martinez Subject: [PATCH v7 0/4] ath11k/ath12k: implement TX flow control Date: Thu, 17 Sep 2026 08:48:21 +0200 Message-ID: <20260917064825.12747-1-jtornosm@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 This series implements custom wake_tx_queue operations for ath11k and ath12k drivers to prevent hardware ring overflow issues under heavy traffic. Without proper flow control, both drivers experience -ENOMEM errors ("failed to transmit frame -12") when the hardware TCL ring fills up. Additionally, ath12k can hang under sustained high throughput. These issues are more commonly observed in VMs with PCIe passthrough but also occur on bare metal systems. The implementation follows the pattern used in the iwlwifi driver, adapted for ath11k/ath12k hardware ring architecture, checking hardware ring space before dequeuing packets from mac80211. Testing shows stable operation with eliminated -ENOMEM errors, no hangs, and improved throughput under heavy traffic conditions. Jose Ignacio Tornos Martinez (4): wifi: ath11k: use queue mapping for WCN6750 ring selection wifi: ath11k/ath12k: remove skb parameter from get_ring_selector wifi: ath11k: implement custom wake_tx_queue with flow control wifi: ath12k: implement custom wake_tx_queue with flow control v7: No modification in patches 1 and 2 Address comments from Jeff Johnson: Patch 3: Add the defensive pattern _bh in both spinlocks (ath11k) Patch 4: Add the defensive pattern _bh in both spinlocks (ath12k) v6: https://lore.kernel.org/all/20260811172435.616200-1-jtornosm@redhat.com/ -- 2.49.0