From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Julius Werner <jwerner@chromium.org>
Cc: Oliver Neukum <oneukum@suse.de>,
Luigi Semenzato <semenzato@chromium.org>,
linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org
Subject: Re: [PATCH 2/2] usb: Make DELAY_INIT quirk wait 100ms between Get Configuration requests
Date: Tue, 4 Mar 2014 11:05:50 -0800 [thread overview]
Message-ID: <20140304190550.GB4695@kroah.com> (raw)
In-Reply-To: <1393959186-331-1-git-send-email-jwerner@chromium.org>
On Tue, Mar 04, 2014 at 10:53:06AM -0800, Julius Werner wrote:
> The DELAY_INIT quirk only reduces the frequency of enumeration failures
> with the Logitech HD Pro C920 and C930e webcams, but does not quite
> eliminate them. We have found that adding a delay of 100ms between the
> first and second Get Configuration request makes the device enumerate
> perfectly reliable even after several weeks of extensive testing. The
> reasons for that are anyone's guess, but since the DELAY_INIT quirk
> already delays enumeration by a whole second, wating for another 10th of
> that isn't really a big deal for the one other device that uses it, and
> it will resolve the problems with these webcams.
>
> Change-Id: Ibf738426307fe8ef362768db2decc9bc2b30a930
What am I supposed to do with this line? :)
next prev parent reply other threads:[~2014-03-04 19:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-04 18:53 Julius Werner
2014-03-04 19:05 ` Greg Kroah-Hartman [this message]
2014-03-04 19:26 ` Julius Werner
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