From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751975AbcFOFpw (ORCPT ); Wed, 15 Jun 2016 01:45:52 -0400 Received: from mga03.intel.com ([134.134.136.65]:26969 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751079AbcFOFpu (ORCPT ); Wed, 15 Jun 2016 01:45:50 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.26,474,1459839600"; d="scan'208";a="987722835" From: Chuah Kim Tatt To: gregkh@linuxfoundation.org, vinod.koul@intel.com Cc: heikki.krogerus@linux.intel.com, andriy.shevchenko@linux.intel.com, mika.westerberg@linux.intel.com, kim.tatt.chuah@intel.com, linux-kernel@vger.kernel.org, jui.nee.tan@intel.com, peter@hurleysoftware.com, linux-serial@vger.kernel.org Subject: [PATCH v2 0/3] Fix DNV HSUART RX DMA timeout interrupt issue Date: Wed, 15 Jun 2016 13:44:10 +0800 Message-Id: <1465969453-16198-1-git-send-email-kim.tatt.chuah@intel.com> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Chuah, Kim Tatt" These patches fix a DNV HSUART DMA issue with timeout interrupts, where RX data is stuck in buffer when RX DMA is used and the number of received bytes is less than 4096. These patches have been tested on Intel Denverton platform. Changes from v1: - Added patch "serial: 8250_dma: Export serial8250_rx_dma_flush()" to solve build error when CONFIG_SERIAL_8250_MID is set to "m". Chuah, Kim Tatt (3): dmaengine: hsu: Export hsu_dma_get_status() serial: 8250_dma: Export serial8250_rx_dma_flush() serial: 8250_mid: Read RX buffer on RX DMA timeout for DNV drivers/dma/hsu/hsu.c | 90 +++++++++++++++++++++++++++++--------- drivers/dma/hsu/pci.c | 11 ++++- drivers/tty/serial/8250/8250_dma.c | 1 + drivers/tty/serial/8250/8250_mid.c | 24 +++++++--- include/linux/dma/hsu.h | 14 ++++-- 5 files changed, 109 insertions(+), 31 deletions(-) -- 1.9.1