From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: Chunfeng Yun <chunfeng.yun@mediatek.com>,
Mathias Nyman <mathias.nyman@intel.com>
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>
Subject: Re: [RESEND PATCH v2] usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling
Date: Mon, 11 Jan 2016 16:01:44 +0200 [thread overview]
Message-ID: <5693B5C8.6090201@linux.intel.com> (raw)
In-Reply-To: <1452216517-3765-1-git-send-email-chunfeng.yun@mediatek.com>
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
WARNING: multiple messages have this Message-ID (diff)
From: mathias.nyman@linux.intel.com (Mathias Nyman)
To: linux-arm-kernel@lists.infradead.org
Subject: [RESEND PATCH v2] usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling
Date: Mon, 11 Jan 2016 16:01:44 +0200 [thread overview]
Message-ID: <5693B5C8.6090201@linux.intel.com> (raw)
In-Reply-To: <1452216517-3765-1-git-send-email-chunfeng.yun@mediatek.com>
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
next prev parent reply other threads:[~2016-01-11 13:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-08 1:28 [RESEND PATCH v2] usb: xhci-mtk: fix AHB bus hang up caused by roothubs polling Chunfeng Yun
2016-01-08 1:28 ` Chunfeng Yun
2016-01-08 1:28 ` Chunfeng Yun
2016-01-11 14:01 ` Mathias Nyman [this message]
2016-01-11 14:01 ` Mathias Nyman
2016-01-12 1:48 ` chunfeng yun
2016-01-12 1:48 ` chunfeng yun
2016-01-12 1:48 ` chunfeng yun
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5693B5C8.6090201@linux.intel.com \
--to=mathias.nyman@linux.intel.com \
--cc=balbi@ti.com \
--cc=chunfeng.yun@mediatek.com \
--cc=djkurtz@chromium.org \
--cc=gregkh@linuxfoundation.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mediatek@lists.infradead.org \
--cc=linux-usb@vger.kernel.org \
--cc=mathias.nyman@intel.com \
--cc=matthias.bgg@gmail.com \
--cc=sergei.shtylyov@cogentembedded.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.