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Date: Wed, 11 Nov 2015 20:46:05 -0800 From: Doug Anderson <dianders@...omium.org> To: John Youn <John.Youn@...opsys.com> Cc: Yunzhi Li <lyz@...k-chips.com>, Julius Werner <jwerner@...gle.com>, Dinh Nguyen <dinguyen@...nsource.altera.com>, "Kaukab, Yousaf" <yousaf.kaukab@...el.com>, "linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, wulf <wulf@...k-chips.com>, Kever Yang <kever.yang@...k-chips.com>, caesar <caesar.wang@...k-chips.com>, Tao Huang <huangtao@...k-chips.com>, rockchip-discuss <rockchip-discuss@...omium.org> Subject: Re: [RFC] usb: dwc2: hcd: fix split schedule issue John, On Wed, Nov 11, 2015 at 8:29 PM, John Youn <John.Youn@...opsys.com> wrote: > I also feel it is not quite right as the SSPLIT should be able to > happen during the SSPLIT of another device. I tried to reproduce > and see the same scheduling but don't see any hang due to it. > > Yunzhi, any details on what kind of hub and keyboard you are > using? I have the same Jabra 410 speaker. I saw it with a standard Logitech mouse. It wasn't a hang, but the mouse effectively became non-functional (behaved like it hung) when you started playing audio. Once the audio stream stopped, the mouse would work again. I was using the same Jabra 410 as well. /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=dwc2/1p, 480M |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 2: Dev 6, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 3: Dev 5, If 0, Class=Audio, Driver=snd-usb-audio, 12M |__ Port 3: Dev 5, If 1, Class=Audio, Driver=snd-usb-audio, 12M |__ Port 3: Dev 5, If 2, Class=Audio, Driver=snd-usb-audio, 12M |__ Port 3: Dev 5, If 3, Class=Human Interface Device, Driver=, 12M Bus 002 Device 005: ID 0b0e:0412 GN Netcom Bus 002 Device 006: ID 046d:c05a Logitech, Inc. M90/M100 Optical Mouse Bus 002 Device 002: ID 1a40:0101 Terminus Technology Inc. Hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub We've also had some discussion of this patch in our bug tracker at <https://chromium-review.googlesource.com/#/c/312160/>. I'll keep digging tomorrow, too. -Doug -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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