Someone

(gdb) list *bcm43xx_dma_handle_xmitstatus+0xbd
0x3ad is in bcm43xx_dma_handle_xmitstatus (include/asm/dma-mapping.h:91).
86    static inline void
87    dma_unmap_single(struct device *dev, dma_addr_t addr,size_t size,
88             int direction)
89    {
90        BUG_ON(!valid_dma_direction(direction));
91        dma_ops->unmap_single(dev, addr, size, direction);
92    }
93    94    #define dma_map_page(dev,page,offset,size,dir) \
95        dma_map_single((dev), page_address(page)+(offset), (size), (dir))