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@canonical.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