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x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfP9SLEUUJkwFJn8l8qnQTO5/HAjhm/7FaOwu4AYIXUIV1Q6dCBOqHklbtoVfeGkwNHGshgh+OyYJVqQ7FVjQ5iaHR2YPRvEhT52rDBIZFKvfHbBJ5etx iQBeZIIOKfCITnQneq6yM1lJ+p6fKrZoKNqobVQ+ebgjMNeSbPQC9+ZA33WFrVpaCgY60Nf3PWACPqXRfVUwX1WZkM+MRvYKPh4QXwnOfyd9BAEAz9lsEQRl X-CM-Analysis: v=2.3 cv=FKU1Odgs c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=kj9zAlcOel0A:10 a=VUJBJC2UJ8kA:10 a=yPCof4ZbAAAA:8 a=VwQbUJbxAAAA:8 a=FOS_WFI1iNJm9nFHTjsA:9 a=CjuIK1q_8ugA:10 a=AjGcO6oz07-iQ99wixmX:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751695AbeEQTKW (ORCPT ); Thu, 17 May 2018 15:10:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:39930 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750924AbeEQTKV (ORCPT ); Thu, 17 May 2018 15:10:21 -0400 Date: Thu, 17 May 2018 21:10:03 +0200 From: Greg KH To: Joe Jin Cc: Konrad Rzeszutek Wilk , John Sobecki , "linux-kernel@vger.kernel.org" , "xen-devel@lists.xenproject.org" , ASHISH_B_SRIVASTAVA , stable@vger.kernel.org Subject: Re: [PATCH UPSTREAM] xen-swiotlb: fix the check condition for xen_swiotlb_free_coherent Message-ID: <20180517191003.GD504@kroah.com> References: <25d8a709-9f2f-fe09-f66c-2a0704ddbbb0@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <25d8a709-9f2f-fe09-f66c-2a0704ddbbb0@oracle.com> User-Agent: Mutt/1.9.5 (2018-04-13) Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Thu, May 17, 2018 at 11:45:57AM -0700, Joe Jin wrote: > When run raidconfig from Dom0 we found that the Xen DMA heap is reduced, > but Dom Heap is increased by the same size. Tracing raidconfig we found > that the related ioctl() in megaraid_sas will call dma_alloc_coherent() > to apply memory. If the memory allocated by Dom0 is not in the DMA area, > it will exchange memory with Xen to meet the requiment. Later drivers > call dma_free_coherent() to free the memory, on xen_swiotlb_free_coherent() > the check condition (dev_addr + size - 1 <= dma_mask) is always false, > it prevents calling xen_destroy_contiguous_region() to return the memory > to the Xen DMA heap. > > This issue introduced by commit 6810df88dcfc2 "xen-swiotlb: When doing > coherent alloc/dealloc check before swizzling the MFNs.". > > Signed-off-by: Joe Jin > Tested-by: John Sobecki > Reviewed-by: Rzeszutek Wilk > Cc: stable@vger.kernel.org > --- > drivers/xen/swiotlb-xen.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) What does "PATCH UPSTREAM" mean? confused, greg k-h