diff options
| -rw-r--r-- | arch/x86_64/kernel/pci-calgary.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/arch/x86_64/kernel/pci-calgary.c b/arch/x86_64/kernel/pci-calgary.c index 7218b5b51e0..a2828e156c3 100644 --- a/arch/x86_64/kernel/pci-calgary.c +++ b/arch/x86_64/kernel/pci-calgary.c @@ -344,6 +344,15 @@ static void iommu_free(struct iommu_table *tbl, dma_addr_t dma_addr, spin_unlock_irqrestore(&tbl->it_lock, flags); } +static inline struct iommu_table *find_iommu_table(struct device *dev) +{ + struct iommu_table *tbl; + + tbl = to_pci_dev(dev)->bus->self->sysdata; + + return tbl; +} + static void __calgary_unmap_sg(struct iommu_table *tbl, struct scatterlist *sglist, int nelems, int direction) { @@ -365,7 +374,7 @@ void calgary_unmap_sg(struct device *dev, struct scatterlist *sglist, int nelems, int direction) { unsigned long flags; - struct iommu_table *tbl = to_pci_dev(dev)->bus->self->sysdata; + struct iommu_table *tbl = find_iommu_table(dev); if (!translate_phb(to_pci_dev(dev))) return; @@ -394,7 +403,7 @@ static int calgary_nontranslate_map_sg(struct device* dev, int calgary_map_sg(struct device *dev, struct scatterlist *sg, int nelems, int direction) { - struct iommu_table *tbl = to_pci_dev(dev)->bus->self->sysdata; + struct iommu_table *tbl = find_iommu_table(dev); unsigned long flags; unsigned long vaddr; unsigned int npages; @@ -448,7 +457,7 @@ dma_addr_t calgary_map_single(struct device *dev, void *vaddr, dma_addr_t dma_handle = bad_dma_address; unsigned long uaddr; unsigned int npages; - struct iommu_table *tbl = to_pci_dev(dev)->bus->self->sysdata; + struct iommu_table *tbl = find_iommu_table(dev); uaddr = (unsigned long)vaddr; npages = num_dma_pages(uaddr, size); @@ -464,7 +473,7 @@ dma_addr_t calgary_map_single(struct device *dev, void *vaddr, void calgary_unmap_single(struct device *dev, dma_addr_t dma_handle, size_t size, int direction) { - struct iommu_table *tbl = to_pci_dev(dev)->bus->self->sysdata; + struct iommu_table *tbl = find_iommu_table(dev); unsigned int npages; if (!translate_phb(to_pci_dev(dev))) @@ -480,9 +489,7 @@ void* calgary_alloc_coherent(struct device *dev, size_t size, void *ret = NULL; dma_addr_t mapping; unsigned int npages, order; - struct iommu_table *tbl; - - tbl = to_pci_dev(dev)->bus->self->sysdata; + struct iommu_table *tbl = find_iommu_table(dev); size = PAGE_ALIGN(size); /* size rounded up to full pages */ npages = size >> PAGE_SHIFT; |