From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from rtits2.realtek.com.tw (rtits2.realtek.com [211.75.126.72]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EE2A51C862F; Mon, 5 Oct 2026 01:52:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=211.75.126.72 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791165130; cv=none; b=bt0Ikdzw3oslLVWXhpm+K+pJ6oLaBi3rJbT9cA7eBnlwFrroVk1L+qvyfjbiqo8zRxyBcACDkyBkg408um0k1bw/PYovj8bAAfDdMoZ9ObhbZlHnoecSFMXZwE95rHT2lrZSUHumyl3xoOdXK3OJ2oCWE6z4PRWMVfg2GypIR78= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1791165130; c=relaxed/simple; bh=YgsrRmrNBTau/ES8l0RE5kXvOByyT65/kGKuFa4VmiU=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:MIME-Version; b=FMzNNtwA/nCg8pVYmdW7XGf5zJkem54RaB9mpmKBRyftcFETtrw8lvJaXbh+7kWPFeH1tvki705FqAroWBa5auHH8dNRnyO0FjB4kWXpLFBdrzlrr7Ext+NUtf/NSTtzDTJZwxdpI7HxxwkLKi5bRRFxedGxk1agb287o9E+Zbg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=realtek.com; spf=pass smtp.mailfrom=realtek.com; dkim=pass (2048-bit key) header.d=realtek.com header.i=@realtek.com header.b=efMoIVTX; arc=none smtp.client-ip=211.75.126.72 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=realtek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=realtek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=realtek.com header.i=@realtek.com header.b="efMoIVTX" X-SpamFilter-By: ArmorX SpamTrap 5.80 with qID 6951q5tF51530858, This message is accepted by code: ctloc85258 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=realtek.com; s=dkim; t=1791165125; bh=YgsrRmrNBTau/ES8l0RE5kXvOByyT65/kGKuFa4VmiU=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:Content-Transfer-Encoding:MIME-Version; b=efMoIVTXxqCDw6GZV7Ty27gKaTbWGAjhXAC7ZWHqzjYH5B2EQJaAJix0vo7xnd5sY hqsjbx2vALlYnSyblSbLgNQ67JEoNR3zFWyFGVh6QsMLYBl95xh6HoKC+XHj1wIB0f dm3/3LJyNQPfQ+cnna/FvaHjF6IokkSNbPPZFlUMwbunkm9w2M5S2yoWPeyse5nNk9 fZSk6vXVqHehD9fhU335E8/nR1o2+0NvcZgqVu8a57VvqizSQlWsBU+a7fnGn4ffqm b4okdkYcaWQvN+3LHA9vwbukW7TJC8hIYCQKI+LfA+9swXsILpbsyvw0+JTZQIiQFD 7EsiA2pRoXMzg== Received: from mail.realtek.com (rtkexhmbs02.realtek.com.tw[172.21.6.41]) by rtits2.realtek.com.tw (8.15.2/3.29/5.94) with ESMTPS id 6951q5tF51530858 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Mon, 5 Oct 2026 09:52:05 +0800 Received: from RTKEXHMBS06.realtek.com.tw (10.21.1.56) by RTKEXHMBS02.realtek.com.tw (172.21.6.41) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.49; Mon, 5 Oct 2026 09:52:05 +0800 Received: from RTKEXHMBS06.realtek.com.tw (10.21.1.56) by RTKEXHMBS06.realtek.com.tw (10.21.1.56) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.2562.49; Mon, 5 Oct 2026 09:52:04 +0800 Received: from RTKEXHMBS06.realtek.com.tw ([::1]) by RTKEXHMBS06.realtek.com.tw ([fe80::b3cc:c263:b82d:e87c%10]) with mapi id 15.02.2562.049; Mon, 5 Oct 2026 09:52:04 +0800 From: Ping-Ke Shih To: Abdurrahman Karadag CC: "linux-wireless@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "rtl8821cerfe2@gmail.com" Subject: RE: [PATCH rtw-next 2/2] wifi: rtw88: pci: warn when a TX ring stops advancing Thread-Topic: [PATCH rtw-next 2/2] wifi: rtw88: pci: warn when a TX ring stops advancing Thread-Index: AQHdUsNFIL/l8RggjUyOfPNj4VrGRLbuMh1w Date: Mon, 5 Oct 2026 01:52:04 +0000 Message-ID: References: <20261002231013.11792-1-abdurrahmankaradag19@gmail.com> <20261002231013.11792-3-abdurrahmankaradag19@gmail.com> In-Reply-To: <20261002231013.11792-3-abdurrahmankaradag19@gmail.com> Accept-Language: en-US, zh-TW Content-Language: zh-TW Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Abdurrahman Karadag wrote: > On RTL8821CE the hardware read index of a TX ring can stop moving while > the driver keeps submitting descriptors. The link stays associated and > RX keeps working, so from userspace this is a dead network with no > explanation: ping and curl report 100% loss and nothing appears in the > log. >=20 > A watchdog dumping the TXBD registers caught five of these across three > boots, all with station power save off and REG_TXPAUSE at 0x00.=20 As you mentioned, REG_TXPAUSE at 0xff sometimes. I think it will be=20 a right direction to dig why it becomes 0xff. Then, we don't need a watchdog to detect the status periodically.=20