From 06301c5e0a16fc4de00582986071aae2b62d6f0a Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Wed, 21 Nov 2018 18:59:05 +0100 Subject: [PATCH] sparc: remove the mapping_error dma_map_ops method Sparc already returns (~(dma_addr_t)0x0) on mapping failures, so we can switch over to returning DMA_MAPPING_ERROR and let the core dma-mapping code handle the rest. Signed-off-by: Christoph Hellwig Acked-by: Linus Torvalds --- arch/sparc/kernel/iommu.c | 12 +++--------- arch/sparc/kernel/iommu_common.h | 2 -- arch/sparc/kernel/pci_sun4v.c | 14 ++++---------- 3 files changed, 7 insertions(+), 21 deletions(-) diff --git a/arch/sparc/kernel/iommu.c b/arch/sparc/kernel/iommu.c index 40d008b0bd3e..0626bae5e3da 100644 --- a/arch/sparc/kernel/iommu.c +++ b/arch/sparc/kernel/iommu.c @@ -315,7 +315,7 @@ bad: bad_no_ctx: if (printk_ratelimit()) WARN_ON(1); - return SPARC_MAPPING_ERROR; + return DMA_MAPPING_ERROR; } static void strbuf_flush(struct strbuf *strbuf, struct iommu *iommu, @@ -548,7 +548,7 @@ static int dma_4u_map_sg(struct device *dev, struct scatterlist *sglist, if (outcount < incount) { outs = sg_next(outs); - outs->dma_address = SPARC_MAPPING_ERROR; + outs->dma_address = DMA_MAPPING_ERROR; outs->dma_length = 0; } @@ -574,7 +574,7 @@ iommu_map_failed: iommu_tbl_range_free(&iommu->tbl, vaddr, npages, IOMMU_ERROR_CODE); - s->dma_address = SPARC_MAPPING_ERROR; + s->dma_address = DMA_MAPPING_ERROR; s->dma_length = 0; } if (s == outs) @@ -742,11 +742,6 @@ static void dma_4u_sync_sg_for_cpu(struct device *dev, spin_unlock_irqrestore(&iommu->lock, flags); } -static int dma_4u_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ - return dma_addr == SPARC_MAPPING_ERROR; -} - static int dma_4u_supported(struct device *dev, u64 device_mask) { struct iommu *iommu = dev->archdata.iommu; @@ -772,7 +767,6 @@ static const struct dma_map_ops sun4u_dma_ops = { .sync_single_for_cpu = dma_4u_sync_single_for_cpu, .sync_sg_for_cpu = dma_4u_sync_sg_for_cpu, .dma_supported = dma_4u_supported, - .mapping_error = dma_4u_mapping_error, }; const struct dma_map_ops *dma_ops = &sun4u_dma_ops; diff --git a/arch/sparc/kernel/iommu_common.h b/arch/sparc/kernel/iommu_common.h index e3c02ba32500..d62ed9c5682d 100644 --- a/arch/sparc/kernel/iommu_common.h +++ b/arch/sparc/kernel/iommu_common.h @@ -48,6 +48,4 @@ static inline int is_span_boundary(unsigned long entry, return iommu_is_span_boundary(entry, nr, shift, boundary_size); } -#define SPARC_MAPPING_ERROR (~(dma_addr_t)0x0) - #endif /* _IOMMU_COMMON_H */ diff --git a/arch/sparc/kernel/pci_sun4v.c b/arch/sparc/kernel/pci_sun4v.c index 565d9ac883d0..fa0e42b4cbfb 100644 --- a/arch/sparc/kernel/pci_sun4v.c +++ b/arch/sparc/kernel/pci_sun4v.c @@ -414,12 +414,12 @@ static dma_addr_t dma_4v_map_page(struct device *dev, struct page *page, bad: if (printk_ratelimit()) WARN_ON(1); - return SPARC_MAPPING_ERROR; + return DMA_MAPPING_ERROR; iommu_map_fail: local_irq_restore(flags); iommu_tbl_range_free(tbl, bus_addr, npages, IOMMU_ERROR_CODE); - return SPARC_MAPPING_ERROR; + return DMA_MAPPING_ERROR; } static void dma_4v_unmap_page(struct device *dev, dma_addr_t bus_addr, @@ -592,7 +592,7 @@ static int dma_4v_map_sg(struct device *dev, struct scatterlist *sglist, if (outcount < incount) { outs = sg_next(outs); - outs->dma_address = SPARC_MAPPING_ERROR; + outs->dma_address = DMA_MAPPING_ERROR; outs->dma_length = 0; } @@ -609,7 +609,7 @@ iommu_map_failed: iommu_tbl_range_free(tbl, vaddr, npages, IOMMU_ERROR_CODE); /* XXX demap? XXX */ - s->dma_address = SPARC_MAPPING_ERROR; + s->dma_address = DMA_MAPPING_ERROR; s->dma_length = 0; } if (s == outs) @@ -688,11 +688,6 @@ static int dma_4v_supported(struct device *dev, u64 device_mask) return pci64_dma_supported(to_pci_dev(dev), device_mask); } -static int dma_4v_mapping_error(struct device *dev, dma_addr_t dma_addr) -{ - return dma_addr == SPARC_MAPPING_ERROR; -} - static const struct dma_map_ops sun4v_dma_ops = { .alloc = dma_4v_alloc_coherent, .free = dma_4v_free_coherent, @@ -701,7 +696,6 @@ static const struct dma_map_ops sun4v_dma_ops = { .map_sg = dma_4v_map_sg, .unmap_sg = dma_4v_unmap_sg, .dma_supported = dma_4v_supported, - .mapping_error = dma_4v_mapping_error, }; static void pci_sun4v_scan_bus(struct pci_pbm_info *pbm, struct device *parent)