Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946421AbbEPIFo (ORCPT ); Sat, 16 May 2015 04:05:44 -0400 Received: from bband-dyn183.178-41-215.t-com.sk ([178.41.215.183]:22464 "EHLO ip4-83-240-18-248.cust.nbox.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1030293AbbEPIFc (ORCPT ); Sat, 16 May 2015 04:05:32 -0400 From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Ludovic Desroches , Jiri Slaby Subject: [PATCH 3.12 093/142] tty/serial: at91: maxburst was missing for dma transfers Date: Sat, 16 May 2015 09:37:33 +0200 Message-Id: <7a90b15c3bb64b4d59badac51d5dda9a735087e3.1431761807.git.jslaby@suse.cz> X-Mailer: git-send-email 2.3.7 In-Reply-To: <70c3d4ae1322b9e9bd7443ef574af5635234a0fa.1431761807.git.jslaby@suse.cz> References: <70c3d4ae1322b9e9bd7443ef574af5635234a0fa.1431761807.git.jslaby@suse.cz> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1754 Lines: 47 From: Ludovic Desroches 3.12-stable review patch. If anyone has any objections, please let me know. =============== 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: Jiri Slaby --- 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 ebdc00f184a1..ab2e22bf54fd 100644 --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -756,6 +756,7 @@ 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, @@ -920,6 +921,7 @@ 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, -- 2.3.7 -- 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/