From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us.padl.com (us.padl.com [216.154.215.154]) (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 9803A331209 for ; Tue, 28 Jul 2026 05:53:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=216.154.215.154 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785217997; cv=none; b=gfzI1yCJEV44/2opI4SKNtAgRtzE2YUmhnd63hIv7C69V2tiCefvyung8MCAdkUkLfzth9ePPxAjVg1ckAAmiXdTx6m00oJ3udhkPKmBAQH51XhDBPTu5F6AIuK+0q6nMmjUORdeRmOATZBRD+V3f44zrE5VZ6SqM51gVGtRanQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785217997; c=relaxed/simple; bh=hVgSZZXuBFk7uISejArwO/h3BcZVvMYOjz9HEoNwm3Q=; h=Content-Type:Mime-Version:Subject:From:In-Reply-To:Date:Cc: Message-Id:References:To; b=T2NcFSSTgt3ed+IfA4N7qiQ5CZDeCFmr8Aa+RuxKdg5a/MeDU+cdpnLd6WPkCcorrwzajNiBKU1IhhtlvYplCn4xDMxW6tM0T0TAqUzJ8JSOuQVcS5xo9ewkzdU7Ba9fsMif2NUfNL5tkl7kutK5AMcT9ZvJ2ufGhfd+qFgEJCw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=padl.com; spf=pass smtp.mailfrom=padl.com; dkim=pass (2048-bit key) header.d=padl.com header.i=@padl.com header.b=A2kAB8cs; arc=none smtp.client-ip=216.154.215.154 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=padl.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=padl.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=padl.com header.i=@padl.com header.b="A2kAB8cs" Received: from smtpclient.apple (border.lukktone.com [139.130.100.52]) by us.padl.com (Postfix) with ESMTPSA id 9C53160964; Tue, 28 Jul 2026 01:53:11 -0400 (EDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=padl.com; s=default; t=1785217994; bh=hVgSZZXuBFk7uISejArwO/h3BcZVvMYOjz9HEoNwm3Q=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=A2kAB8csum8T1cdCCYPmfMI57RKgHLZNh0yziPOEFzqHwbvKSbM4TfsHyN4bFvlNr rWkc9VWbZevbauwiBYQmGjlvlHrD1xwUn9vUgaJcWi2cpobJW2M8gFIOzNc7FyGTA8 /Zz1LggeeO9A+B7GDbkH3YoN5Bhrl7pWmC7FdsZhwDvsuMUMALuiD+CZQLyI/k9+Ph 3609E3aIjbB1UmluDJ40wVs5iWG2IVuHeBF0KR/BZKbKpMnpvUqNhj8COqWoy9fUpY VwXs+HOXwTCvIU3MVPRjBjNfVPR1L2n80RbhLm/1/HuD0zs5YOJhwicTMNvXluq/yE UEt4o54w8QwlQ== Content-Type: text/plain; charset=us-ascii Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3864.600.51.1.1\)) Subject: Re: [PATCH net-next v4 3/5] net: dsa: mv88e6xxx: decouple the PTP timecounter from the register lock From: Luke Howard In-Reply-To: <20260728040001.D87D21F00A3E@smtp.kernel.org> Date: Tue, 28 Jul 2026 15:52:59 +1000 Cc: robh@kernel.org, netdev@vger.kernel.org, Vladimir Oltean , Jakub Kicinski , Andrew Lunn , Richard Cochran , Cedric Jehasse , Kieran Tyrrell , Max Holtmann , Max Hunter , Christoph Mellauner , Simon Gapp Content-Transfer-Encoding: quoted-printable Message-Id: References: <20260727-mv88e6xxx-ptp-fixes-v4-0-10b4020155fc@padl.com> <20260727-mv88e6xxx-ptp-fixes-v4-3-10b4020155fc@padl.com> <20260728040001.D87D21F00A3E@smtp.kernel.org> To: sashiko-reviews@lists.linux.dev X-Mailer: Apple Mail (2.3864.600.51.1.1) > Because cancel_delayed_work_sync() is waiting for the worker to finish = while > holding the mutex the worker needs, can this lead to an AB-BA = deadlock? This is a pre-existing bug with a simple fix that will be made in the = next revision. Luke=