> +     if ((if_type == LPFC_SLI_INTF_IF_TYPE_6) &&
> +         (pci_resource_start(pdev, PCI_64BIT_BAR4))) {

The above contains a lot of unneeded parenthesis.

[...]

> +                     /* Enable combined writes for DPP aperture */
> +                     pg_addr = (unsigned long)(wq->dpp_regaddr) & PAGE_MASK;
> +#ifdef CONFIG_X86
> +                     rc = set_memory_wc(pg_addr, 1);
> +                     if (rc) {
> +                             lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
> +                                             "3272 Cannot setup Combined "
> +                                             "Write on WQ[%d] - disable 
> DPP\n",
> +                                             wq->queue_id);
> +                             phba->cfg_enable_dpp = 0;
> +                     }
> +#else
> +                     phba->cfg_enable_dpp = 0;
> +#endif
> +             } else
> +                     wq->db_regaddr = phba->sli4_hba.WQDBregaddr;

I don't really like the set_memory_wc() call here. Neither do I like the ifdef
CONFIG_X86 special casing.

If you really need write combining, can't you at least use ioremap_wc()?

Thanks,
        Johannes

-- 
Johannes Thumshirn                                          Storage
jthumsh...@suse.de                                +49 911 74053 689
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