From: Felipe Balbi <felipe.balbi@linux.intel.com>
To: Pawel Laszczak <pawell@cadence.com>,
Roger Quadros <rogerq@ti.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>
Cc: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>,
"mark.rutland@arm.com" <mark.rutland@arm.com>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
"hdegoede@redhat.com" <hdegoede@redhat.com>,
"heikki.krogerus@linux.intel.com"
<heikki.krogerus@linux.intel.com>,
"andy.shevchenko@gmail.com" <andy.shevchenko@gmail.com>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"jbergsagel@ti.com" <jbergsagel@ti.com>,
"nsekhar@ti.com" <nsekhar@ti.com>, "nm@ti.com" <nm@ti.com>,
Suresh Punnoose <sureshp@cadence.com>,
"peter.chen@nxp.com" <peter.chen@nxp.com>,
Rahul Kumar <kurahul@cadence.com>
Subject: [v4,6/6] usb:cdns3 Fix for stuck packets in on-chip OUT buffer.
Date: Thu, 21 Feb 2019 09:14:30 +0200 [thread overview]
Message-ID: <87va1dbokp.fsf@linux.intel.com> (raw)
Hi,
(please break your emails at 80-columns)
Pawel Laszczak <pawell@cadence.com> writes:
>>> One more thing. Workaround has implemented algorithm that decide for which
>>> endpoint it should be enabled. e.g for composite device MSC+NCM+ACM it
>>> should work only for ACM OUT endpoint.
>>>
>>
>>If ACM driver didn't queue the request for ACM OUT endpoint, why does the
>>controller accept the data at all?
>>
>>I didn't understand why we need a workaround for this. It should be standard
>>behaviour to NAK data if function driver didn't request for all endpoints.
>
> Yes, I agree with you. Controller shouldn’t accept such packet. As I know this
> behavior will be fixed in RTL.
>
> But I assume that some older version of this controller are one the market,
> and driver should work correct with them.
>
> In the feature this workaround can be limited only to selected controllers.
>
> Even now I assume that it can be enabled/disabled by module parameter.
no module parameters, please. Use revision detection in runtime.
next reply other threads:[~2019-02-21 7:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-21 7:14 Felipe Balbi [this message]
-- strict thread matches above, loose matches on Subject: below --
2019-03-11 8:15 [v4,6/6] usb:cdns3 Fix for stuck packets in on-chip OUT buffer Peter Chen
2019-03-07 9:13 Roger Quadros
2019-03-07 7:06 Pawel Laszczak
2019-03-04 10:25 Roger Quadros
2019-02-20 15:50 Pawel Laszczak
2019-02-20 13:17 Roger Quadros
2019-02-20 11:18 Pawel Laszczak
2019-02-20 10:24 Roger Quadros
2019-02-14 19:45 Pawel Laszczak
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