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Tue, 28 Sep 2021 11:57:57 -0700 (PDT) Received: from ziepe.ca ([206.223.160.26]) by smtp.gmail.com with ESMTPSA id o20sm22682349pgd.31.2021.09.28.11.57.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Sep 2021 11:57:57 -0700 (PDT) Received: from jgg by mlx with local (Exim 4.94) (envelope-from ) id 1mVIId-007FjO-20; Tue, 28 Sep 2021 15:57:55 -0300 Date: Tue, 28 Sep 2021 15:57:55 -0300 From: Jason Gunthorpe To: Logan Gunthorpe Cc: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, Stephen Bates , Christoph Hellwig , Dan Williams , Christian =?utf-8?B?S8O2bmln?= , John Hubbard , Don Dutile , Matthew Wilcox , Daniel Vetter , Jakowski Andrzej , Minturn Dave B , Jason Ekstrand , Dave Hansen , Xiong Jianxin , Bjorn Helgaas , Ira Weiny , Robin Murphy , Martin Oliveira , Chaitanya Kulkarni Subject: Re: [PATCH v3 05/20] dma-mapping: allow EREMOTEIO return code for P2PDMA transfers Message-ID: <20210928185755.GM3544071@ziepe.ca> References: <20210916234100.122368-1-logang@deltatee.com> <20210916234100.122368-6-logang@deltatee.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210916234100.122368-6-logang@deltatee.com> Authentication-Results: imf10.hostedemail.com; dkim=pass header.d=ziepe.ca header.s=google header.b=Jx2GOuLq; spf=pass (imf10.hostedemail.com: domain of jgg@ziepe.ca designates 209.85.214.173 as permitted sender) smtp.mailfrom=jgg@ziepe.ca; dmarc=none X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: AFD376001989 X-Stat-Signature: thw3fsmp8tstqkm9jwtxijbecdcmeiei X-HE-Tag: 1632855478-320867 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Sep 16, 2021 at 05:40:45PM -0600, Logan Gunthorpe wrote: > Add EREMOTEIO error return to dma_map_sgtable() which will be used > by .map_sg() implementations that detect P2PDMA pages that the > underlying DMA device cannot access. > > Signed-off-by: Logan Gunthorpe > --- > kernel/dma/mapping.c | 16 +++++++++------- > 1 file changed, 9 insertions(+), 7 deletions(-) Reviewed-by: Jason Gunthorpe Jason