From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4BCFAC61DA4 for ; Mon, 30 Jan 2023 11:49:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236755AbjA3Ltr (ORCPT ); Mon, 30 Jan 2023 06:49:47 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45742 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236693AbjA3Ltd (ORCPT ); Mon, 30 Jan 2023 06:49:33 -0500 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3F4BA2CC5F; Mon, 30 Jan 2023 03:49:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1675079340; x=1706615340; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=rKk3BcTrOaYcavGP7FjeV9tA755cnL8HiSR0t7sd6Fg=; b=danzpZ975VUc2SLLAeo8HtPhjR+knyC1nescji9+GrDJBpJ+2K4zvgnt umX3PiPVux8+Lie8ytG2PFEP7WOjxJBEPkOfUmcIp+0Kk5BECVeISG0Wb sHbo0Rq8l+6iyj2K/IBgxCI27eXfY+K3Fe/kVapNszl/pmXzaHeKZE0hO KqpBEKoSFteHXCZf5zJp8n9baqRBUFU6jWw8KXQaHyqdwz23/hqWKYYev G+N1Bs1SGvIRJ3EE2axU15kv6UDvrAw895Mn1iNBDOZJkML1aOmKnPVhW 72kw8O6ldZuFoyOHN+xB8i43aYyCLAizlEkAtE3rLs4kFfuIi3fnVS/Sl Q==; X-IronPort-AV: E=McAfee;i="6500,9779,10605"; a="307882334" X-IronPort-AV: E=Sophos;i="5.97,257,1669104000"; d="scan'208";a="307882334" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jan 2023 03:48:52 -0800 X-IronPort-AV: E=McAfee;i="6500,9779,10605"; a="732672095" X-IronPort-AV: E=Sophos;i="5.97,257,1669104000"; d="scan'208";a="732672095" Received: from nbelenko-mobl.ger.corp.intel.com (HELO ijarvine-MOBL2.ger.corp.intel.com) ([10.251.210.56]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Jan 2023 03:48:49 -0800 From: =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= To: Greg Kroah-Hartman , Jiri Slaby , Andy Shevchenko , linux-serial@vger.kernel.org, Heikki Krogerus Cc: Gilles BULOZ , linux-kernel@vger.kernel.org, =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , stable@vger.kernel.org Subject: [PATCH 0/2] serial: 8250_dma: DMA Rx race fixes Date: Mon, 30 Jan 2023 13:48:39 +0200 Message-Id: <20230130114841.25749-1-ilpo.jarvinen@linux.intel.com> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Fix two races in DMA Rx completion and rearm handling. I know in advance that the first patch will not be backport friendly because of commit 56dc5074cbec ("serial: 8250_dma: Rearm DMA Rx if more data is pending") that is not even in 6.1 but I can create the custom backport on request. Cc: stable@vger.kernel.org Ilpo Järvinen (2): serial: 8250_dma: Fix DMA Rx completion race serial: 8250_dma: Fix DMA Rx rearm race drivers/tty/serial/8250/8250_dma.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) -- 2.30.2