Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752889AbdGLPNX (ORCPT ); Wed, 12 Jul 2017 11:13:23 -0400 Received: from shards.monkeyblade.net ([184.105.139.130]:55198 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752331AbdGLPNW (ORCPT ); Wed, 12 Jul 2017 11:13:22 -0400 Date: Wed, 12 Jul 2017 08:13:20 -0700 (PDT) Message-Id: <20170712.081320.21515285122907934.davem@davemloft.net> To: tushar.n.dave@oracle.com Cc: chris.hyser@oracle.com, sowmini.varadhan@oracle.com, egtvedt@samfundet.no, dan.carpenter@oracle.com, krzk@kernel.org, bart.vanassche@sandisk.com, sparclinux@vger.kernel.org, linux-kernel@vger.kernel.org, hch@lst.de, mroos@linux.ee Subject: Re: [sparc-next] SPARC64: Fix sun4v DMA panic From: David Miller In-Reply-To: <1499808887-31483-1-git-send-email-tushar.n.dave@oracle.com> References: <1499808887-31483-1-git-send-email-tushar.n.dave@oracle.com> X-Mailer: Mew version 6.7 on Emacs 24.5 / Mule 6.0 (HANACHIRUSATO) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Wed, 12 Jul 2017 08:13:21 -0700 (PDT) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 546 Lines: 15 From: Tushar Dave Date: Tue, 11 Jul 2017 14:34:47 -0700 > 64bit DMA only supported on sun4v equipped with ATU IOMMU HW. > 'Commit b02c2b0bfd7ae ("sparc: remove arch specific dma_supported > implementations")' introduced a code that incorrectly allow > dma_supported() to succeed for 64bit dma mask even if system doesn't > have ATU IOMMU. This results into panic. > > Fix it. > > Reported-by: Meelis Roos > Signed-off-by: Tushar Dave Applied to the 'sparc' tree, thanks.