From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:56810 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754711AbcHBHGw (ORCPT ); Tue, 2 Aug 2016 03:06:52 -0400 Subject: Patch "dmaengine: at_xdmac: align descriptors on 64 bits" has been added to the 4.6-stable tree To: ludovic.desroches@atmel.com, gregkh@linuxfoundation.org, nicolas.ferre@atmel.com, vinod.koul@intel.com Cc: , From: Date: Tue, 02 Aug 2016 09:04:27 +0200 Message-ID: <147012146714844@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 dmaengine: at_xdmac: align descriptors on 64 bits to the 4.6-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: dmaengine-at_xdmac-align-descriptors-on-64-bits.patch and it can be found in the queue-4.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 4a9723e8df68cfce4048517ee32e37f78854b6fb Mon Sep 17 00:00:00 2001 From: Ludovic Desroches Date: Thu, 12 May 2016 16:54:08 +0200 Subject: dmaengine: at_xdmac: align descriptors on 64 bits From: Ludovic Desroches commit 4a9723e8df68cfce4048517ee32e37f78854b6fb upstream. Having descriptors aligned on 64 bits allows update CNDA and CUBC in an atomic way. Signed-off-by: Ludovic Desroches Fixes: e1f7c9eee707 ("dmaengine: at_xdmac: creation of the atmel eXtended DMA Controller driver") Reviewed-by: Nicolas Ferre Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- drivers/dma/at_xdmac.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -242,7 +242,7 @@ struct at_xdmac_lld { u32 mbr_dus; /* Destination Microblock Stride Register */ }; - +/* 64-bit alignment needed to update CNDA and CUBC registers in an atomic way. */ struct at_xdmac_desc { struct at_xdmac_lld lld; enum dma_transfer_direction direction; @@ -253,7 +253,7 @@ struct at_xdmac_desc { unsigned int xfer_size; struct list_head descs_list; struct list_head xfer_node; -}; +} __aligned(sizeof(u64)); static inline void __iomem *at_xdmac_chan_reg_base(struct at_xdmac *atxdmac, unsigned int chan_nb) { Patches currently in stable-queue which might be from ludovic.desroches@atmel.com are queue-4.6/dmaengine-at_xdmac-fix-residue-corruption.patch queue-4.6/dmaengine-at_xdmac-double-fifo-flush-needed-to-compute-residue.patch queue-4.6/dmaengine-at_xdmac-align-descriptors-on-64-bits.patch