diff options
Diffstat (limited to 'arch/arm/mm/dma-mapping.c')
| -rw-r--r-- | arch/arm/mm/dma-mapping.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c index 8bda55f00b7b..a25d6b0e22a4 100644 --- a/arch/arm/mm/dma-mapping.c +++ b/arch/arm/mm/dma-mapping.c @@ -2169,6 +2169,9 @@ arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size) if (!bitmap_size) return ERR_PTR(-EINVAL); + WARN(!IS_ALIGNED(size, SZ_128M), + "size is not aligned to 128M, alignment enforced"); + if (bitmap_size > PAGE_SIZE) { extensions = bitmap_size / PAGE_SIZE; bitmap_size = PAGE_SIZE; @@ -2191,7 +2194,7 @@ arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, u64 size) mapping->nr_bitmaps = 1; mapping->extensions = extensions; mapping->base = base; - mapping->bits = bits; + mapping->bits = BITS_PER_BYTE * bitmap_size; spin_lock_init(&mapping->lock); |