linux-kernel - Re: [RFC] ARM: sa1100/assabet: move dmabounce hack to ohci driver

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Message-ID: <CAK8P3a1DghU4fm_6OA8=_SG_ODYsnrw0J_Z-kmC9ay1hH=Gqwg@mail.gmail.com>
Date:   Tue, 1 Feb 2022 17:08:15 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Alan Stern <stern@...land.harvard.edu>
Cc:     Russell King <linux@...linux.org.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Christoph Hellwig <hch@...radead.org>,
        Laurentiu Tudor <laurentiu.tudor@....com>,
        USB list <linux-usb@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] ARM: sa1100/assabet: move dmabounce hack to ohci driver

On Tue, Feb 1, 2022 at 4:31 PM Alan Stern <stern@...land.harvard.edu> wrote:

> > diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
> > index 3c7c64ff3c0a..5f2fa46c7958 100644
> > --- a/drivers/usb/core/hcd.c
> > +++ b/drivers/usb/core/hcd.c
> > @@ -1260,7 +1260,8 @@ void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb)
> >  EXPORT_SYMBOL_GPL(usb_hcd_unlink_urb_from_ep);
> >
> >  /*
> > - * Some usb host controllers can only perform dma using a small SRAM area.
> > + * Some usb host controllers can only perform dma using a small SRAM area,
> > + * or that have restrictions in addressable DRAM.
>
> s/that //
> s/in/on/

Fixed now.

> Otherwise the USB parts of this look okay to me.  I don't have suitable
> hardware to test either.  (I wonder if anyone is still using this
> platform...)

I assumed Russell was still using the Assabet, but his last upstream
commits for sa1100 are from 2016 (merged in 2019), so that may have
changed in the meantime.

> Acked-by: Alan Stern <stern@...land.harvard.edu>

Thanks!

       Arnd