linux-kernel - Re: [PATCH] xhci: Fix USB ports for Dell Inspiron 5775

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Message-ID: <b78a3067-8c7c-811a-2d64-4a23ff6b6250@linux.intel.com>
Date:   Tue, 10 Apr 2018 10:46:32 +0300
From:   Mathias Nyman <mathias.nyman@...ux.intel.com>
To:     Kai Heng Feng <kai.heng.feng@...onical.com>,
        mathias.nyman@...el.com
Cc:     Greg KH <gregkh@...uxfoundation.org>,
        Linux USB Mailing List <linux-usb@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH] xhci: Fix USB ports for Dell Inspiron 5775

On 10.04.2018 07:56, Kai Heng Feng wrote:
> Hi Matthias,
> 
>> On Mar 18, 2018, at 11:11 PM, Kai-Heng Feng <kai.heng.feng@...onical.com> wrote:
>>
>> The Dell Inspiron 5775 is a Raven Ridge. The Enable Slot command timed
>> out when a USB device gets plugged:
>> [ 212.156326] xhci_hcd 0000:03:00.3: Error while assigning device slot ID
>> [ 212.156340] xhci_hcd 0000:03:00.3: Max number of devices this xHCI host supports is 64.
>> [ 212.156348] usb usb2-port3: couldn't allocate usb_device
>>
>> AMD suggests that a delay before xHC suspends can fix the issue.
>>
>> I can confirm it fixes the issue, so use the suspend delay quirk for
>> Raven Ridge's xHC.
> 
> I am hoping this patch can get merged in v4.17...
> 
> Thanks,
> Kai-Heng
> 

Added to queue, sending after rc1

-Mathias