From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40511 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932069AbbJMVt5 (ORCPT ); Tue, 13 Oct 2015 17:49:57 -0400 Subject: Patch "dmaengine: at_xdmac: fix bug in prep_dma_cyclic" has been added to the 4.2-stable tree To: ludovic.desroches@atmel.com, gregkh@linuxfoundation.org, vinod.koul@intel.com Cc: , From: Date: Tue, 13 Oct 2015 14:49:54 -0700 Message-ID: <1444772994134234@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: fix bug in prep_dma_cyclic to the 4.2-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-fix-bug-in-prep_dma_cyclic.patch and it can be found in the queue-4.2 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From e900c30dc1bb0cbc07708e9be1188f531632b2ef Mon Sep 17 00:00:00 2001 From: Ludovic Desroches Date: Wed, 22 Jul 2015 16:12:29 +0200 Subject: dmaengine: at_xdmac: fix bug in prep_dma_cyclic From: Ludovic Desroches commit e900c30dc1bb0cbc07708e9be1188f531632b2ef upstream. In cyclic mode, the round chaining has been broken by the introduction of at_xdmac_queue_desc(): AT_XDMAC_MBR_UBC_NDE is set for all descriptors excepted for the last one. at_xdmac_queue_desc() has to be called one more time to chain the last and the first descriptors. Signed-off-by: Ludovic Desroches Fixes: 0d0ee751f7f7 ("dmaengine: xdmac: Rework the chaining logic") Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- drivers/dma/at_xdmac.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) --- a/drivers/dma/at_xdmac.c +++ b/drivers/dma/at_xdmac.c @@ -806,10 +806,7 @@ at_xdmac_prep_dma_cyclic(struct dma_chan list_add_tail(&desc->desc_node, &first->descs_list); } - prev->lld.mbr_nda = first->tx_dma_desc.phys; - dev_dbg(chan2dev(chan), - "%s: chain lld: prev=0x%p, mbr_nda=%pad\n", - __func__, prev, &prev->lld.mbr_nda); + at_xdmac_queue_desc(chan, prev, first); first->tx_dma_desc.flags = flags; first->xfer_size = buf_len; first->direction = direction; Patches currently in stable-queue which might be from ludovic.desroches@atmel.com are queue-4.2/dmaengine-at_xdmac-clean-used-descriptor.patch queue-4.2/dmaengine-at_xdmac-change-block-increment-addressing-mode.patch queue-4.2/dmaengine-at_xdmac-fix-bug-in-prep_dma_cyclic.patch