linux-kernel - Re: [PATCH V2 5/6] usb: ehci: Add new EHCI driver for Broadcom STB SoC's

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Date:   Wed, 24 Oct 2018 08:14:40 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Al Cooper <alcooperx@...il.com>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Alban Bedel <albeu@...e.fr>, Alex Elder <elder@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Avi Fishman <avifishman70@...il.com>,
        bcm-kernel-feedback-list@...adcom.com,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        David Miller <davem@...emloft.net>,
        DTML <devicetree@...r.kernel.org>,
        Dmitry Osipenko <digetx@...il.com>,
        gregkh <gregkh@...uxfoundation.org>,
        "Gustavo A. R. Silva" <gustavo@...eddedor.com>,
        Hans de Goede <hdegoede@...hat.com>,
        James Hogan <jhogan@...nel.org>, sunjianguo1@...wei.com,
        Johan Hovold <johan@...nel.org>,
        Kees Cook <keescook@...omium.org>,
        USB list <linux-usb@...r.kernel.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Mark Rutland <mark.rutland@....com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Mathias Nyman <mathias.nyman@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        rishabhb@...eaurora.org, Rob Herring <robh+dt@...nel.org>,
        Roger Quadros <rogerq@...com>
Subject: Re: [PATCH V2 5/6] usb: ehci: Add new EHCI driver for Broadcom STB SoC's

On Wed, Oct 17, 2018 at 11:30 PM Al Cooper <alcooperx@...il.com> wrote:

> +
> +static int ehci_brcm_probe(struct platform_device *pdev)
> +{
> +       struct usb_hcd *hcd;
> +       struct resource *res_mem;
> +       struct brcm_priv *priv;
> +       int irq;
> +       int err;
> +
> +       if (usb_disabled())
> +               return -ENODEV;
> +
> +       err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
> +       if (err)
> +               return err;

You should never use "dma_coerce_mask_and_coherent" in new code. Make sure that
the DT is correct and call dma_set_mask_and_coherent() instead.

> +#ifdef CONFIG_OF
> +static const struct of_device_id brcm_ehci_of_match[] = {
> +       { .compatible = "brcm,bcm7445-ehci", },
> +       {}
> +};
> +
> +MODULE_DEVICE_TABLE(of, brcm_ehci_of_match);
> +#endif /* CONFIG_OF */
> +
> +static struct platform_driver ehci_brcm_driver = {
> +       .probe          = ehci_brcm_probe,
> +       .remove         = ehci_brcm_remove,
> +       .shutdown       = usb_hcd_platform_shutdown,
> +       .driver         = {
> +               .owner  = THIS_MODULE,
> +               .name   = "ehci-brcm",
> +               .pm     = &ehci_brcm_pm_ops,
> +               .of_match_table = of_match_ptr(brcm_ehci_of_match),
> +       }
> +};

You won't ever use this driver without CONFIG_OF, so just remove the #ifdef and
of_match_ptr() wrapper here. It will still build fine without CONFIG_OF.

      Arnd