From mboxrd@z Thu Jan 1 00:00:00 1970 From: Logan Gunthorpe Date: Thu, 15 Jul 2021 16:45:35 +0000 Subject: [PATCH v1 07/16] ia64/sba_iommu: return error code from sba_map_sg_attrs() Message-Id: <20210715164544.6827-8-logang@deltatee.com> List-Id: References: <20210715164544.6827-1-logang@deltatee.com> In-Reply-To: <20210715164544.6827-1-logang@deltatee.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit 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 , Michael Ellerman , Niklas Schnelle , Thomas Bogendoerfer From: Martin Oliveira The .map_sg() op now expects an error code instead of zero on failure. Propagate the return of dma_mapping_error() up, if it is an errno. sba_coalesce_chunks() may only presently fail if sba_alloc_range() fails, which in turn only fails if the iommu is out of mapping resources, hence a -ENOMEM is used in that case. Signed-off-by: Martin Oliveira Signed-off-by: Logan Gunthorpe Cc: Michael Ellerman Cc: Niklas Schnelle Cc: Thomas Bogendoerfer --- arch/ia64/hp/common/sba_iommu.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/arch/ia64/hp/common/sba_iommu.c b/arch/ia64/hp/common/sba_iommu.c index 9148ddbf02e5..09dbe07a18c1 100644 --- a/arch/ia64/hp/common/sba_iommu.c +++ b/arch/ia64/hp/common/sba_iommu.c @@ -1431,7 +1431,7 @@ static int sba_map_sg_attrs(struct device *dev, struct scatterlist *sglist, unsigned long attrs) { struct ioc *ioc; - int coalesced, filled = 0; + int coalesced, filled = 0, ret; #ifdef ASSERT_PDIR_SANITY unsigned long flags; #endif @@ -1458,8 +1458,9 @@ static int sba_map_sg_attrs(struct device *dev, struct scatterlist *sglist, sglist->dma_length = sglist->length; sglist->dma_address = sba_map_page(dev, sg_page(sglist), sglist->offset, sglist->length, dir, attrs); - if (dma_mapping_error(dev, sglist->dma_address)) - return 0; + ret = dma_mapping_error(dev, sglist->dma_address); + if (ret) + return ret; return 1; } @@ -1486,7 +1487,7 @@ static int sba_map_sg_attrs(struct device *dev, struct scatterlist *sglist, coalesced = sba_coalesce_chunks(ioc, dev, sglist, nents); if (coalesced < 0) { sba_unmap_sg_attrs(dev, sglist, nents, dir, attrs); - return 0; + return -ENOMEM; } /* -- 2.20.1