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From: Mathias Nyman <mathias.nyman@intel.com>
To: Chunfeng Yun <chunfeng.yun@mediatek.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: [PATCH] usb: xhci: fix config fail of FS hub behind a HS hub with MTT
Date: Fri, 04 Dec 2015 14:06:30 +0200	[thread overview]
Message-ID: <566181C6.6090107@intel.com> (raw)
In-Reply-To: <1449123254-21654-1-git-send-email-chunfeng.yun@mediatek.com>

On 03.12.2015 08:14, Chunfeng Yun wrote:
> if a full speed hub connects to a high speed hub which
> supports MTT, the MTT field of its slot context will be set
> to 1 when xHCI driver setups an xHCI virtual device in
> xhci_setup_addressable_virt_dev(); once usb core fetch its
> hub descriptor, and need to update the xHC's internal data
> structures for the device, the HUB field of its slot context
> will be set to 1 too, meanwhile MTT is also set before,
> this will cause configure endpoint command fail, so in the
> case, we should clear MTT to 0 for full speed hub according
> to section 6.2.2
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---

Thanks, patch added to queue

-Mathias

WARNING: multiple messages have this Message-ID (diff)
From: mathias.nyman@intel.com (Mathias Nyman)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] usb: xhci: fix config fail of FS hub behind a HS hub with MTT
Date: Fri, 04 Dec 2015 14:06:30 +0200	[thread overview]
Message-ID: <566181C6.6090107@intel.com> (raw)
In-Reply-To: <1449123254-21654-1-git-send-email-chunfeng.yun@mediatek.com>

On 03.12.2015 08:14, Chunfeng Yun wrote:
> if a full speed hub connects to a high speed hub which
> supports MTT, the MTT field of its slot context will be set
> to 1 when xHCI driver setups an xHCI virtual device in
> xhci_setup_addressable_virt_dev(); once usb core fetch its
> hub descriptor, and need to update the xHC's internal data
> structures for the device, the HUB field of its slot context
> will be set to 1 too, meanwhile MTT is also set before,
> this will cause configure endpoint command fail, so in the
> case, we should clear MTT to 0 for full speed hub according
> to section 6.2.2
>
> Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
> ---

Thanks, patch added to queue

-Mathias

  reply	other threads:[~2015-12-04 12:06 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-03  6:14 [PATCH] usb: xhci: fix config fail of FS hub behind a HS hub with MTT Chunfeng Yun
2015-12-03  6:14 ` Chunfeng Yun
2015-12-03  6:14 ` Chunfeng Yun
2015-12-04 12:06 ` Mathias Nyman [this message]
2015-12-04 12:06   ` Mathias Nyman

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