Name
kfifo_dma_in_finish — 
     finish a DMA IN operation
 
Synopsis
|  kfifo_dma_in_finish ( | fifo, | 
|  | len ); | 
 
Arguments
- fifo
- 
     address of the fifo to be used
     
- len
- 
     number of bytes to received
     
Description
   This macro finish a DMA IN operation. The in counter will be updated by
   the len parameter. No error checking will be done.
   
   Note that with only one concurrent reader and one concurrent
   writer, you don't need extra locking to use these macros.