cmd->SCp.buffers_residual = cmd->use_sg - 1;
cmd->SCp.ptr = (char *)page_address(cmd->SCp.buffer->page)+
cmd->SCp.buffer->offset;
cmd->SCp.buffers_residual = cmd->use_sg - 1;
cmd->SCp.ptr = (char *)page_address(cmd->SCp.buffer->page)+
cmd->SCp.buffer->offset;