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Fri, 14 Dec 2018 22:30:19 -0800 (PST) Date: Fri, 14 Dec 2018 22:30:18 -0800 From: Guenter Roeck To: Christoph Hellwig Subject: Re: [PATCH 3/6] sparc: remove the sparc32_dma_ops indirection Message-ID: <20181215063018.GA11415@roeck-us.net> References: <20181208174115.16237-1-hch@lst.de> <20181208174115.16237-4-hch@lst.de> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20181208174115.16237-4-hch@lst.de> User-Agent: Mutt/1.5.24 (2015-08-30) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181214_223032_247090_FC9E9E98 X-CRM114-Status: UNSURE ( 8.96 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-parisc@vger.kernel.org, Ezequiel Garcia , Vineet Gupta , linux-mips@vger.kernel.org, dri-devel@lists.freedesktop.org, "Matwey V. Kornilov" , iommu@lists.linux-foundation.org, openrisc@lists.librecores.org, Laurent Pinchart , sparclinux@vger.kernel.org, linux-snps-arc@lists.infradead.org, Robin Murphy , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, Dec 08, 2018 at 09:41:12AM -0800, Christoph Hellwig wrote: > There is no good reason to have a double indirection for the sparc32 > dma ops, so remove the sparc32_dma_ops and define separate dma_map_ops > instance for the different IOMMU types. > Except maybe this: scsi host0: esp scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] scsi 0:0:0:0: Direct-Access QEMU QEMU HARDDISK 2.5+ PQ: 0 ANSI: 5 scsi target0:0:0: Beginning Domain Validation scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] scsi host0: Data transfer overflow. scsi host0: cur_residue[0] tot_residue[-36] len[36] and so on, until qemu is terminated. This is seen with all sparc32 qemu emulations. Reverting the patch fixes the problem. Guenter _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel