linux-kernel - Re: [PATCH v6 3/4] usb: ehci: Add new EHCI driver for Broadcom STB SoC's

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Date:   Thu, 7 May 2020 08:43:16 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Alan Cooper <alcooperx@...il.com>
Cc:     ": Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
        Alan Stern <stern@...land.harvard.edu>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        DTML <devicetree@...r.kernel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        USB list <linux-usb@...r.kernel.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Rob Herring <robh+dt@...nel.org>,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH v6 3/4] usb: ehci: Add new EHCI driver for Broadcom STB
 SoC's

On Wed, May 06, 2020 at 04:23:01PM -0400, Alan Cooper wrote:
> > > +     irq = platform_get_irq(pdev, 0);
> > > +     if (irq < 0)
> >
> > "<=" right?
> 
> The example in the comment above platform_get_irq in platform.c says
> "if (irq < 0)"

There is work to fix that up on the mailing lists, 0 is not a valid irq :)

> > > +static int __init ehci_brcm_init(void)
> > > +{
> > > +     if (usb_disabled())
> > > +             return -ENODEV;
> >
> > You check this here, so why are you also checking it in the probe
> > function?
> 
> Good point. I'll remove the one in probe. This was another thing that
> came from the ehci and ohci platform drivers.  About a third of the
> drivers in this directory do this, probably because they started with
> the platform drivers. Do you think it's worth me submitting a patch to
> clean this up at some point?

Yes please.

> 
> >
> > thanks,
> >
> > greg k-h
> 
> I'll wait for your response before sending a V7.

Never wait for someone who you have no idea how much email they get :)

thanks,

greg k-h