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| Path | csiph.com!eternal-september.org!feeder.eternal-september.org!aioe.org!bofh.it!news.nic.it!robomod |
|---|---|
| From | Mathias Nyman <mathias.nyman@linux.intel.com> |
| Newsgroups | linux.kernel |
| Subject | Re: [RESEND PATCH v2] usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling |
| Date | Mon, 11 Jan 2016 15:00:03 +0100 |
| Message-ID | <qPLaP-38k-27@gated-at.bofh.it> (permalink) |
| References | <qOu2n-7SE-17@gated-at.bofh.it> |
| X-Original-To | Chunfeng Yun <chunfeng.yun@mediatek.com>, Mathias Nyman <mathias.nyman@intel.com> |
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| Sender | robomod@news.nic.it |
| List-ID | <linux-kernel.vger.kernel.org> |
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| Approved | robomod@news.nic.it |
| Lines | 21 |
| Organization | linux.* mail to news gateway |
| X-Original-Cc | Matthias Brugger <matthias.bgg@gmail.com>, Felipe Balbi <balbi@ti.com>, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-usb@vger.kernel.org, linux-mediatek@lists.infradead.org, Daniel Kurtz <djkurtz@chromium.org>, Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>, Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| X-Original-Date | Mon, 11 Jan 2016 16:01:44 +0200 |
| X-Original-Message-ID | <5693B5C8.6090201@linux.intel.com> |
| X-Original-References | <1452216517-3765-1-git-send-email-chunfeng.yun@mediatek.com> |
| X-Original-Sender | linux-kernel-owner@vger.kernel.org |
| Xref | csiph.com linux.kernel:1306234 |
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On 08.01.2016 03:28, Chunfeng Yun wrote:
> when ip fails to enter sleep mode, register access protection will
> be disabled, at the same time if all clocks are disabled, access
> register will hang up AHB bus.
> the common case causes ip sleep failure is that after all ports
> enter U3 but before ip enters sleep mode, a port receives a resume
> signal('K'). this will happens when such as clicks mouse to try to
> do remote-wakeup to stop system enter suspend.
> so stop polling root hubs to avoid access xHCI register on bus
> suspend, and restart it when bus resumes.
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---
> drivers/usb/host/xhci-mtk.c | 23 +++++++++++++++++++++++
The xhci Mediatek (xhci-mtk etc) support is in usb-next and should be available first time
in 4.5-rc1 kernel.
I'll forward fixes for it once 4.5-rc1 is out, they should end up in final 4.5
-Mathias
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[RESEND PATCH v2] usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling Chunfeng Yun <chunfeng.yun@mediatek.com> - 2016-01-08 02:30 +0100
Re: [RESEND PATCH v2] usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling Mathias Nyman <mathias.nyman@linux.intel.com> - 2016-01-11 15:00 +0100
Re: [RESEND PATCH v2] usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling chunfeng yun <chunfeng.yun@mediatek.com> - 2016-01-12 02:50 +0100
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