Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757427AbbEVJj3 (ORCPT ); Fri, 22 May 2015 05:39:29 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:34904 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755347AbbEVI7J (ORCPT ); Fri, 22 May 2015 04:59:09 -0400 From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Ludovic Desroches , Greg Kroah-Hartman , Luis Henriques Subject: [PATCH 3.16.y-ckt 029/129] tty/serial: at91: maxburst was missing for dma transfers Date: Fri, 22 May 2015 09:56:54 +0100 Message-Id: <1432285114-9254-30-git-send-email-luis.henriques@canonical.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1432285114-9254-1-git-send-email-luis.henriques@canonical.com> References: <1432285114-9254-1-git-send-email-luis.henriques@canonical.com> X-Extended-Stable: 3.16 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1838 Lines: 45 3.16.7-ckt12 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Ludovic Desroches commit a8d4e01637902311c5643b69a5c80e2805f04054 upstream. Maxburst was not set when doing the dma slave configuration. This value is checked by the recently introduced xdmac. It causes an error when doing the slave configuration and so prevents from using dma. Signed-off-by: Ludovic Desroches Acked-by: Nicolas Ferre Signed-off-by: Greg Kroah-Hartman Signed-off-by: Luis Henriques --- drivers/tty/serial/atmel_serial.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/tty/serial/atmel_serial.c b/drivers/tty/serial/atmel_serial.c index 60d05fc2c1c4..0d39ae4ff533 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -860,6 +860,7 @@ static int atmel_prepare_tx_dma(struct uart_port *port) config.direction = DMA_MEM_TO_DEV; config.dst_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; config.dst_addr = port->mapbase + ATMEL_US_THR; + config.dst_maxburst = 1; ret = dmaengine_device_control(atmel_port->chan_tx, DMA_SLAVE_CONFIG, @@ -1024,6 +1025,7 @@ static int atmel_prepare_rx_dma(struct uart_port *port) config.direction = DMA_DEV_TO_MEM; config.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE; config.src_addr = port->mapbase + ATMEL_US_RHR; + config.src_maxburst = 1; ret = dmaengine_device_control(atmel_port->chan_rx, DMA_SLAVE_CONFIG, -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/