From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:53218 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933317AbbHJVfO (ORCPT ); Mon, 10 Aug 2015 17:35:14 -0400 Subject: Patch "dmaengine: pl330: Fix overflow when reporting residue in memcpy" has been added to the 4.1-stable tree To: k.kozlowski@samsung.com, gregkh@linuxfoundation.org, vinod.koul@intel.com Cc: , From: Date: Mon, 10 Aug 2015 14:35:13 -0700 Message-ID: <143924251335185@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: pl330: Fix overflow when reporting residue in memcpy to the 4.1-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-pl330-fix-overflow-when-reporting-residue-in-memcpy.patch and it can be found in the queue-4.1 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From ae128293d97404f491dc76f1843c7adacfec3441 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Mon, 15 Jun 2015 17:25:16 +0900 Subject: dmaengine: pl330: Fix overflow when reporting residue in memcpy From: Krzysztof Kozlowski commit ae128293d97404f491dc76f1843c7adacfec3441 upstream. During memcpy operations the residue was always set to an u32 overflowed value. In pl330_tx_status() function number of currently transferred bytes was subtracted from internal "bytes_requested" field. However this "bytes_requested" was not initialized at start to length of memcpy buffer so transferred bytes were subtracted from 0 causing overflow. Signed-off-by: Krzysztof Kozlowski Fixes: aee4d1fac887 ("dmaengine: pl330: improve pl330_tx_status() function") Signed-off-by: Vinod Koul Signed-off-by: Greg Kroah-Hartman --- drivers/dma/pl330.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/dma/pl330.c +++ b/drivers/dma/pl330.c @@ -2621,6 +2621,7 @@ pl330_prep_dma_memcpy(struct dma_chan *c desc->rqcfg.brst_len = 1; desc->rqcfg.brst_len = get_burst_len(desc, len); + desc->bytes_requested = len; desc->txd.flags = flags; Patches currently in stable-queue which might be from k.kozlowski@samsung.com are queue-4.1/dmaengine-pl330-fix-overflow-when-reporting-residue-in-memcpy.patch