linux-kernel - Re: [PATCH v1] usb: host: Implement workaround for Erratum A-007463

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Message-ID: <87fubg4kf0.fsf@linux.intel.com>
Date:   Thu, 21 Sep 2017 09:48:03 +0300
From:   Felipe Balbi <balbi@...nel.org>
To:     Alan Stern <stern@...land.harvard.edu>, yinbo.zhu@....com
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mathias Nyman <mathias.nyman@...el.com>,
        "open list\:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "moderated list\:ARM PORT" <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        "open list\:DESIGNWARE USB3 DRD IP DRIVER" 
        <linux-usb@...r.kernel.org>
Subject: Re: [PATCH v1] usb: host: Implement workaround for Erratum A-007463


Hi,

Alan Stern <stern@...land.harvard.edu> writes:

> The Subject: line should specify which type of USB host controller the
> patch is for.  The kernel contains lots of different USB host
> controller drivers.  How are we supposed to know that Erratum A-007463
> applies to dwc3 xHCI controllers?
>
> The Subject: line should say something like:
>
> [PATCH v1] USB: host: dwc3: Implement workaround for Erratum A-007643

If we're talking about a dwc3 implementation, we need a quirk flag on
dwc3 core to be passed down to the xhci-plat device, like every other
quirk on this controller.

I also need a reference to SNPS stars ticket that talks about this problem.

-- 
balbi