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iommu: return full error code from iommu_map_sg[_atomic]()

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Convert to ssize_t return code so the return code from __iommu_map()
can be returned all the way down through dma_iommu_map_sg().

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Logan Gunthorpe 2021-07-29 14:15:21 -06:00 committed by Christoph Hellwig
parent c81be74e7d
commit ad8f36e4b6
2 changed files with 18 additions and 19 deletions
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15
drivers/iommu/iommu.c
View file

@ -2567,9 +2567,9 @@ size_t iommu_unmap_fast(struct iommu_domain *domain,
}
EXPORT_SYMBOL_GPL(iommu_unmap_fast);
static size_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot,
gfp_t gfp)
static ssize_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot,
gfp_t gfp)
{
const struct iommu_ops *ops = domain->ops;
size_t len = 0, mapped = 0;
@ -2610,19 +2610,18 @@ static size_t __iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
/* undo mappings already done */
iommu_unmap(domain, iova, mapped);
return 0;
return ret;
}
size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot)
ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot)
{
might_sleep();
return __iommu_map_sg(domain, iova, sg, nents, prot, GFP_KERNEL);
}
EXPORT_SYMBOL_GPL(iommu_map_sg);
size_t iommu_map_sg_atomic(struct iommu_domain *domain, unsigned long iova,
ssize_t iommu_map_sg_atomic(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot)
{
return __iommu_map_sg(domain, iova, sg, nents, prot, GFP_ATOMIC);

22
include/linux/iommu.h
View file

@ -414,11 +414,11 @@ extern size_t iommu_unmap(struct iommu_domain *domain, unsigned long iova,
extern size_t iommu_unmap_fast(struct iommu_domain *domain,
unsigned long iova, size_t size,
struct iommu_iotlb_gather *iotlb_gather);
extern size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg,unsigned int nents, int prot);
extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
unsigned long iova, struct scatterlist *sg,
unsigned int nents, int prot);
extern ssize_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot);
extern ssize_t iommu_map_sg_atomic(struct iommu_domain *domain,
unsigned long iova, struct scatterlist *sg,
unsigned int nents, int prot);
extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, dma_addr_t iova);
extern void iommu_set_fault_handler(struct iommu_domain *domain,
iommu_fault_handler_t handler, void *token);
@ -679,18 +679,18 @@ static inline size_t iommu_unmap_fast(struct iommu_domain *domain,
return 0;
}
static inline size_t iommu_map_sg(struct iommu_domain *domain,
unsigned long iova, struct scatterlist *sg,
unsigned int nents, int prot)
static inline ssize_t iommu_map_sg(struct iommu_domain *domain,
unsigned long iova, struct scatterlist *sg,
unsigned int nents, int prot)
{
return 0;
return -ENODEV;
}
static inline size_t iommu_map_sg_atomic(struct iommu_domain *domain,
static inline ssize_t iommu_map_sg_atomic(struct iommu_domain *domain,
unsigned long iova, struct scatterlist *sg,
unsigned int nents, int prot)
{
return 0;
return -ENODEV;
}
static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)