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From: Logan Gunthorpe <logang@deltatee.com>
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 <hch@lst.de>,
	Marek Szyprowski <m.szyprowski@samsung.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Stephen Bates <sbates@raithlin.com>,
	Martin Oliveira <martin.oliveira@eideticom.com>,
	Logan Gunthorpe <logang@deltatee.com>,
	Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Juergen Gross <jgross@suse.com>,
	Stefano Stabellini <sstabellini@kernel.org>
Subject: [PATCH v1 13/16] xen: swiotlb: return error code from xen_swiotlb_map_sg()
Date: Thu, 15 Jul 2021 10:45:41 -0600	[thread overview]
Message-ID: <20210715164544.6827-14-logang@deltatee.com> (raw)
In-Reply-To: <20210715164544.6827-1-logang@deltatee.com>

From: Martin Oliveira <martin.oliveira@eideticom.com>

The .map_sg() op now expects an error code instead of zero on failure.

xen_swiotlb_map_sg() may only fail if xen_swiotlb_map_page() fails, but
xen_swiotlb_map_page() only supports returning errors as
DMA_MAPPING_ERROR. So coalesce all errors into EINVAL.

Signed-off-by: Martin Oliveira <martin.oliveira@eideticom.com>
Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>
---
 drivers/xen/swiotlb-xen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c
index 24d11861ac7d..b5707127c9d7 100644
--- a/drivers/xen/swiotlb-xen.c
+++ b/drivers/xen/swiotlb-xen.c
@@ -509,7 +509,7 @@ xen_swiotlb_map_sg(struct device *dev, struct scatterlist *sgl, int nelems,
 out_unmap:
 	xen_swiotlb_unmap_sg(dev, sgl, i, dir, attrs | DMA_ATTR_SKIP_CPU_SYNC);
 	sg_dma_len(sgl) = 0;
-	return 0;
+	return -EINVAL;
 }
 
 static void
-- 
2.20.1


  parent reply	other threads:[~2021-07-15 16:46 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-15 16:45 [PATCH v1 00/16] .map_sg() error cleanup Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 01/16] dma-mapping: Allow map_sg() ops to return negative error codes Logan Gunthorpe
2021-07-16  6:29   ` Christoph Hellwig
2021-07-15 16:45 ` [PATCH v1 02/16] dma-direct: Return appropriate error code from dma_direct_map_sg() Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 03/16] iommu: Return full error code from iommu_map_sg[_atomic]() Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 04/16] dma-iommu: Return error code from iommu_dma_map_sg() Logan Gunthorpe
2021-07-16  6:31   ` Christoph Hellwig
2021-07-15 16:45 ` [PATCH v1 05/16] alpha: return error code from alpha_pci_map_sg() Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 06/16] ARM/dma-mapping: return error code from .map_sg() ops Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 07/16] ia64/sba_iommu: return error code from sba_map_sg_attrs() Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 08/16] MIPS/jazzdma: return error code from jazz_dma_map_sg() Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 09/16] powerpc/iommu: return error code from .map_sg() ops Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 10/16] s390/pci: return error code from s390_dma_map_sg() Logan Gunthorpe
2021-07-16  8:24   ` Niklas Schnelle
2021-07-15 16:45 ` [PATCH v1 11/16] sparc/iommu: return error codes from .map_sg() ops Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 12/16] parisc: return error code " Logan Gunthorpe
2021-07-15 16:45 ` Logan Gunthorpe [this message]
2021-07-19 20:22   ` [PATCH v1 13/16] xen: swiotlb: return error code from xen_swiotlb_map_sg() Boris Ostrovsky
2021-07-15 16:45 ` [PATCH v1 14/16] x86/amd_gart: return error code from gart_map_sg() Logan Gunthorpe
2021-07-16  6:32   ` Christoph Hellwig
2021-07-16 12:11     ` Robin Murphy
2021-07-15 16:45 ` [PATCH v1 15/16] dma-mapping: return error code from dma_dummy_map_sg() Logan Gunthorpe
2021-07-15 16:45 ` [PATCH v1 16/16] dma-mapping: Disallow .map_sg operations from returning zero on error Logan Gunthorpe
2021-07-16  6:33   ` Christoph Hellwig
2021-07-16 12:19     ` Robin Murphy
2021-07-16 16:17     ` Logan Gunthorpe
2021-07-15 16:53 ` [PATCH v1 00/16] .map_sg() error cleanup Russell King (Oracle)
2021-07-15 16:56   ` Logan Gunthorpe

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