From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:49070 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753668AbcKULlT (ORCPT ); Mon, 21 Nov 2016 06:41:19 -0500 Subject: Patch "IB/rdmavt: rdmavt can handle non aligned page maps" has been added to the 4.8-stable tree To: dennis.dalessandro@intel.com, dledford@redhat.com, gregkh@linuxfoundation.org, mike.marciniszyn@intel.com Cc: , From: Date: Mon, 21 Nov 2016 12:41:14 +0100 Message-ID: <1479728474198156@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 IB/rdmavt: rdmavt can handle non aligned page maps to the 4.8-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: ib-rdmavt-rdmavt-can-handle-non-aligned-page-maps.patch and it can be found in the queue-4.8 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From e1fafdcbe0e3e769c6a83317dd845bc99b4fe61d Mon Sep 17 00:00:00 2001 From: Dennis Dalessandro Date: Mon, 10 Oct 2016 06:14:45 -0700 Subject: IB/rdmavt: rdmavt can handle non aligned page maps From: Dennis Dalessandro commit e1fafdcbe0e3e769c6a83317dd845bc99b4fe61d upstream. The initial code for rdmavt carried with it a restriction that was a vestige from the qib driver, that to dma map a page it had to be less than a page size. This is not the case on modern hardware, both qib and hfi1 will be just fine with unaligned map requests. This fixes a 4.8 regression where by an IPoIB transfer of > PAGE_SIZE will hang because the dma map page call always fails. This was introduced after commit 5faba5469522 ("IB/ipoib: Report SG feature regardless of HW UD CSUM capability") added the capability to use SG by default. Rather than override this, the HW supports it, so allow SG. Reviewed-by: Mike Marciniszyn Signed-off-by: Dennis Dalessandro Signed-off-by: Doug Ledford Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/sw/rdmavt/dma.c | 3 --- 1 file changed, 3 deletions(-) --- a/drivers/infiniband/sw/rdmavt/dma.c +++ b/drivers/infiniband/sw/rdmavt/dma.c @@ -90,9 +90,6 @@ static u64 rvt_dma_map_page(struct ib_de if (WARN_ON(!valid_dma_direction(direction))) return BAD_DMA_ADDRESS; - if (offset + size > PAGE_SIZE) - return BAD_DMA_ADDRESS; - addr = (u64)page_address(page); if (addr) addr += offset; Patches currently in stable-queue which might be from dennis.dalessandro@intel.com are queue-4.8/ib-hfi1-fix-rnr_timer-addition.patch queue-4.8/ib-rdmavt-rdmavt-can-handle-non-aligned-page-maps.patch