From: Alan Stern <stern@rowland.harvard.edu>
To: Doug Anderson <dianders@chromium.org>
Cc: "John Youn" <John.Youn@synopsys.com>,
"Felipe Balbi" <balbi@ti.com>, "Yunzhi Li" <lyz@rock-chips.com>,
"Heiko Stübner" <heiko@sntech.de>,
"open list:ARM/Rockchip SoC..."
<linux-rockchip@lists.infradead.org>,
"Julius Werner" <jwerner@chromium.org>,
"Herrero, Gregory" <gregory.herrero@intel.com>,
"Kaukab, Yousaf" <yousaf.kaukab@intel.com>,
"Dinh Nguyen" <dinguyen@opensource.altera.com>,
"John Youn" <johnyoun@synopsys.com>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Ming Lei" <ming.lei@canonical.com>
Subject: Re: [PATCH 2/3] usb: dwc2: host: Giveback URB in tasklet context
Date: Sat, 7 Nov 2015 10:09:44 -0500 (EST) [thread overview]
Message-ID: <Pine.LNX.4.44L0.1511071008010.23886-100000@netrider.rowland.org> (raw)
In-Reply-To: <CAD=FV=WysKiu9iVOzPSLrabEqTtFhxPxvkhTqpQf3gp=h55d9w@mail.gmail.com>
On Fri, 6 Nov 2015, Doug Anderson wrote:
> You're talking to someone who has only been looking at the details of
> USB for about 2 days now. :-P ...I'm trying to grok all of that, but
> I'm not sure I got it all...
>
> I will say that "URB_ISO_ASAP" is not referenced anywhere in dwc2.
> Presumably that's a bug (or missing feature). Would it be terrible if
> I just ignored that for now and said that if you try to add something
> to the queue and we're currently in the process of waiting for our
> timer to expire then you'll just get back -ENOSPC? dwc2 won't deal
> perfectly well if you've very close to exhausting the available
> bandwidth, but that could be a task for another day.
Sure. It's not necessary to support everything perfectly, right from
the beginning.
Alan Stern
next prev parent reply other threads:[~2015-11-07 15:09 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-04 22:53 [PATCH 0/3] dwc2: Speed up the interrupt handler quite a bit Douglas Anderson
2015-11-04 22:53 ` Douglas Anderson
2015-11-04 22:53 ` [PATCH 1/3] usb: dwc2: rockchip: Make the max_transfer_size automatic Douglas Anderson
2015-11-04 22:53 ` [PATCH 2/3] usb: dwc2: host: Giveback URB in tasklet context Douglas Anderson
2015-11-04 22:53 ` Douglas Anderson
2015-11-05 0:30 ` Doug Anderson
2015-11-05 0:30 ` Doug Anderson
2015-11-05 15:19 ` Alan Stern
2015-11-06 0:29 ` Doug Anderson
2015-11-06 15:40 ` Alan Stern
2015-11-07 1:26 ` Doug Anderson
2015-11-07 15:09 ` Alan Stern [this message]
2015-11-04 22:53 ` [PATCH 3/3] usb: dwc2: host: Get aligned DMA in a more supported way Douglas Anderson
2015-11-05 19:18 ` [PATCH 0/3] dwc2: Speed up the interrupt handler quite a bit Heiko Stuebner
2015-11-05 19:18 ` Heiko Stuebner
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