From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:41634 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751388AbbEIR0r (ORCPT ); Sat, 9 May 2015 13:26:47 -0400 Subject: Patch "tty/serial: at91: maxburst was missing for dma transfers" has been added to the 4.0-stable tree To: ludovic.desroches@atmel.com, gregkh@linuxfoundation.org, nicolas.ferre@atmel.com Cc: , From: Date: Sat, 09 May 2015 19:24:55 +0200 Message-ID: <143119229583164@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled tty/serial: at91: maxburst was missing for dma transfers to the 4.0-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: tty-serial-at91-maxburst-was-missing-for-dma-transfers.patch and it can be found in the queue-4.0 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From a8d4e01637902311c5643b69a5c80e2805f04054 Mon Sep 17 00:00:00 2001 From: Ludovic Desroches Date: Thu, 16 Apr 2015 16:58:12 +0200 Subject: tty/serial: at91: maxburst was missing for dma transfers 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 --- drivers/tty/serial/atmel_serial.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/tty/serial/atmel_serial.c +++ b/drivers/tty/serial/atmel_serial.c @@ -880,6 +880,7 @@ static int atmel_prepare_tx_dma(struct u 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_slave_config(atmel_port->chan_tx, &config); @@ -1059,6 +1060,7 @@ static int atmel_prepare_rx_dma(struct u 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_slave_config(atmel_port->chan_rx, &config); Patches currently in stable-queue which might be from ludovic.desroches@atmel.com are queue-4.0/tty-serial-at91-maxburst-was-missing-for-dma-transfers.patch