SCSI_DMA_MAP(9)                           SCSI mid layer                          SCSI_DMA_MAP(9)



NAME
       scsi_dma_map - perform DMA mapping against command's sg lists

SYNOPSIS
       int scsi_dma_map(struct scsi_cmnd * cmd);

ARGUMENTS
       cmd
           scsi command

DESCRIPTION
       Returns the number of sg lists actually used, zero if the sg lists is NULL, or -ENOMEM if
       the mapping failed.

AUTHORS
       James Bottomley <James.Bottomley AT hansenpartnership.com>
           Author.

       Rob Landley <rob AT landley.net>
           Author.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                           SCSI_DMA_MAP(9)