diff options
Diffstat (limited to 'arch/powerpc/kernel/dma-iommu.c')
| -rw-r--r-- | arch/powerpc/kernel/dma-iommu.c | 21 |
1 files changed, 11 insertions, 10 deletions
diff --git a/arch/powerpc/kernel/dma-iommu.c b/arch/powerpc/kernel/dma-iommu.c index 37771a51811..6e54a0fd31a 100644 --- a/arch/powerpc/kernel/dma-iommu.c +++ b/arch/powerpc/kernel/dma-iommu.c @@ -74,16 +74,17 @@ static int dma_iommu_dma_supported(struct device *dev, u64 mask) { struct iommu_table *tbl = get_iommu_table_base(dev); - if (!tbl || tbl->it_offset > mask) { - printk(KERN_INFO - "Warning: IOMMU offset too big for device mask\n"); - if (tbl) - printk(KERN_INFO - "mask: 0x%08llx, table offset: 0x%08lx\n", - mask, tbl->it_offset); - else - printk(KERN_INFO "mask: 0x%08llx, table unavailable\n", - mask); + if (!tbl) { + dev_info(dev, "Warning: IOMMU dma not supported: mask 0x%08llx" + ", table unavailable\n", mask); + return 0; + } + + if ((tbl->it_offset + tbl->it_size) > (mask >> IOMMU_PAGE_SHIFT)) { + dev_info(dev, "Warning: IOMMU window too big for device mask\n"); + dev_info(dev, "mask: 0x%08llx, table end: 0x%08lx\n", + mask, (tbl->it_offset + tbl->it_size) << + IOMMU_PAGE_SHIFT); return 0; } else return 1; |