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Miller" , Niklas Schnelle , Michael Ellerman Date: Thu, 15 Jul 2021 10:45:39 -0600 Message-Id: <20210715164544.6827-12-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, davem@davemloft.net, schnelle@linux.ibm.com, mpe@ellerman.id.au 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 11/16] sparc/iommu: return error codes from .map_sg() ops 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: 1626367604328100004 Content-Type: text/plain; charset="utf-8" From: Martin Oliveira The .map_sg() op now expects an error code instead of zero on failure. Returning an errno from __sbus_iommu_map_sg() results in sbus_iommu_map_sg_gflush() and sbus_iommu_map_sg_pflush() returning an errno, as those functions are wrappers around __sbus_iommu_map_sg(). Signed-off-by: Martin Oliveira Signed-off-by: Logan Gunthorpe Cc: "David S. Miller" Cc: Niklas Schnelle Cc: Michael Ellerman --- arch/sparc/kernel/iommu.c | 4 ++-- arch/sparc/kernel/pci_sun4v.c | 4 ++-- arch/sparc/mm/iommu.c | 2 +- 3 files changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/sparc/kernel/iommu.c b/arch/sparc/kernel/iommu.c index a034f571d869..0589acd34201 100644 --- a/arch/sparc/kernel/iommu.c +++ b/arch/sparc/kernel/iommu.c @@ -448,7 +448,7 @@ static int dma_4u_map_sg(struct device *dev, struct sca= tterlist *sglist, iommu =3D dev->archdata.iommu; strbuf =3D dev->archdata.stc; if (nelems =3D=3D 0 || !iommu) - return 0; + return -EINVAL; =20 spin_lock_irqsave(&iommu->lock, flags); =20 @@ -580,7 +580,7 @@ static int dma_4u_map_sg(struct device *dev, struct sca= tterlist *sglist, } spin_unlock_irqrestore(&iommu->lock, flags); =20 - return 0; + return -EINVAL; } =20 /* If contexts are being used, they are the same in all of the mappings diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c index 9de57e88f7a1..d90e80fa5705 100644 --- a/arch/sparc/kernel/pci_sun4v.c +++ b/arch/sparc/kernel/pci_sun4v.c @@ -486,7 +486,7 @@ static int dma_4v_map_sg(struct device *dev, struct sca= tterlist *sglist, =20 iommu =3D dev->archdata.iommu; if (nelems =3D=3D 0 || !iommu) - return 0; + return -EINVAL; atu =3D iommu->atu; =20 prot =3D HV_PCI_MAP_ATTR_READ; @@ -619,7 +619,7 @@ static int dma_4v_map_sg(struct device *dev, struct sca= tterlist *sglist, } local_irq_restore(flags); =20 - return 0; + return -EINVAL; } =20 static void dma_4v_unmap_sg(struct device *dev, struct scatterlist *sglist, diff --git a/arch/sparc/mm/iommu.c b/arch/sparc/mm/iommu.c index 0c0342e5b10d..01ffcedd159c 100644 --- a/arch/sparc/mm/iommu.c +++ b/arch/sparc/mm/iommu.c @@ -256,7 +256,7 @@ static int __sbus_iommu_map_sg(struct device *dev, stru= ct scatterlist *sgl, sg->dma_address =3D__sbus_iommu_map_page(dev, sg_page(sg), sg->offset, sg->length, per_page_flush); if (sg->dma_address =3D=3D DMA_MAPPING_ERROR) - return 0; + return -EINVAL; sg->dma_length =3D sg->length; } =20 --=20 2.20.1