From mboxrd@z Thu Jan  1 00:00:00 1970
From: Felipe Balbi <balbi@ti.com>
Subject: Re: [PATCH 3/3] usb: dwc3: add a quirk for device disconnection
 issue in Synopsis dwc3 core
Date: Mon, 22 Dec 2014 09:37:30 -0600
Message-ID: <20141222153730.GA12815@saruman>
References: <1418695828-605-1-git-send-email-Sneeker.Yeh@tw.fujitsu.com>
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To: Sneeker Yeh <sneeker.yeh@gmail.com>
Cc: Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>, Mark Rutland <mark.rutland@arm.com>, Ian Campbell <ijc+devicetree@hellion.org.uk>, Kumar Gala <galak@codeaurora.org>, Felipe Balbi <balbi@ti.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Mathias Nyman <mathias.nyman@intel.com>, Grant Likely <grant.likely@linaro.org>, Alan Stern <stern@rowland.harvard.edu>, Arnd Bergmann <arnd@arndb.de>, Paul Bolle <pebolle@tiscali.nl>, Hans de Goede <hdegoede@redhat.com>, Thomas Pugliese <thomas.pugliese@gmail.com>, David Mosberger <davidm@egauge.net>, Peter Griffin <peter.griffin@linaro.org>, Sylwester Nawrocki <s.nawrocki@samsung.com>, Andrew Bresticker <abrestic@chromium.org>, Gregory CLEMENT <gregory.clement@free-electrons.com>, Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@
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On Tue, Dec 16, 2014 at 10:10:28AM +0800, Sneeker Yeh wrote:
> Synopsis DesignWare USB3 IP Core integrated with a config-free
> phy needs special handling during device disconnection to avoid
> the host controller dying.
>=20
> This quirk makes sure PORT_CSC is cleared after the disable slot
> command when usb device is disconnected from internal root hub,
> otherwise, Synopsis core would fall into a state that cannot use
> any endpoint command. Consequently, device disconnection procedure
> might not be finished because sometimes endpoint need to be stop
> by endpoint stop command issuing.
>=20
> Symptom usually happens when disconnected device is keyboard,
> mouse, and hub.

you need to point us to the synopsys STARS ticket number. That's the
only way to reference this specific quirk. Add it to a comment
somewhere.

--=20
balbi

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