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a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:MIME-Version:References:In-Reply-To: Message-Id:Date:Cc:To:From:content-disposition; bh=vqT1KkJerIfgaTefMotO3Chy3j++S8LdBe9O7PbAuPI=; b=UhCSGYb9Hh594E6gCqsPd8BAVF pKFOgXIbxUfdPPVzF/cB5FTH/VcdadsNJpPOA8fb+86FYlUkje813rqTyXqNkfFOXrg4vHIBiEawd Ue5POEIn3rBPYfLExsc8Xja8ytUmXiEc8lXyB3lQzMnXCaAVoW1S122sN/Y4PRvsldT9zx4D31hmj kyU+tBa+DDzOnhd34ZpsrgCfP0Rr2jhoThfhiK+pV4GXkeLKZpvj2ObNCjHzjvTvru3hoWuWfadGb EjJv2OgYrXLxoQt2XfM+U4v/5ffh1bHMKHptxk8xY/3AhuOcIgRNd7QM1pWeQCGZ2tl+ugxArmRZZ JObh356A==; From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, iommu@lists.linux-foundation.org, linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org Cc: Christoph Hellwig , Marek Szyprowski , Robin Murphy , Stephen Bates , Martin Oliveira , Logan Gunthorpe , Richard Henderson , Ivan Kokshaysky , Matt Turner Date: Thu, 15 Jul 2021 10:45:33 -0600 Message-Id: <20210715164544.6827-6-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20210715164544.6827-1-logang@deltatee.com> References: <20210715164544.6827-1-logang@deltatee.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-parisc@vger.kernel.org, xen-devel@lists.xenproject.org, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, sbates@raithlin.com, martin.oliveira@eideticom.com, logang@deltatee.com, rth@twiddle.net, ink@jurassic.park.msu.ru, mattst88@gmail.com X-SA-Exim-Mail-From: gunthorp@deltatee.com X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on ale.deltatee.com X-Spam-Level: X-Spam-Status: No, score=-6.7 required=5.0 tests=ALL_TRUSTED,BAYES_00, MYRULES_NO_TEXT autolearn=no autolearn_force=no version=3.4.2 Subject: [PATCH v1 05/16] alpha: return error code from alpha_pci_map_sg() X-SA-Exim-Version: 4.2.1 (built Wed, 08 May 2019 21:11:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) X-ZohoMail-DKIM: pass (identity @deltatee.com) X-ZM-MESSAGEID: 1626368233506100001 Content-Type: text/plain; charset="utf-8" From: Martin Oliveira The .map_sg() op now expects an error code instead of zero on failure. pci_map_single_1() can fail for different reasons, but since the only supported type of error return is DMA_MAPPING_ERROR, we coalesce those errors into EINVAL. ENOMEM is returned when no page tables can be allocated. Signed-off-by: Martin Oliveira Signed-off-by: Logan Gunthorpe Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Matt Turner --- arch/alpha/kernel/pci_iommu.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/alpha/kernel/pci_iommu.c b/arch/alpha/kernel/pci_iommu.c index 35d7b3096d6e..72fc2465d13c 100644 --- a/arch/alpha/kernel/pci_iommu.c +++ b/arch/alpha/kernel/pci_iommu.c @@ -649,7 +649,9 @@ static int alpha_pci_map_sg(struct device *dev, struct = scatterlist *sg, sg->dma_address =3D pci_map_single_1(pdev, SG_ENT_VIRT_ADDRESS(sg), sg->length, dac_allowed); - return sg->dma_address !=3D DMA_MAPPING_ERROR; + if (sg->dma_address =3D=3D DMA_MAPPING_ERROR) + return -EINVAL; + return 1; } =20 start =3D sg; @@ -685,8 +687,10 @@ static int alpha_pci_map_sg(struct device *dev, struct= scatterlist *sg, if (out < end) out->dma_length =3D 0; =20 - if (out - start =3D=3D 0) + if (out - start =3D=3D 0) { printk(KERN_WARNING "pci_map_sg failed: no entries?\n"); + return -ENOMEM; + } DBGA("pci_map_sg: %ld entries\n", out - start); =20 return out - start; @@ -699,7 +703,7 @@ static int alpha_pci_map_sg(struct device *dev, struct = scatterlist *sg, entries. Unmap them now. */ if (out > start) pci_unmap_sg(pdev, start, out - start, dir); - return 0; + return -ENOMEM; } =20 /* Unmap a set of streaming mode DMA translations. Again, cpu read --=20 2.20.1