Messages in this thread | | | Subject | Re: [PATCH] xhci: Fix USB ports for Dell Inspiron 5775 | From | Kai Heng Feng <> | Date | Tue, 10 Apr 2018 12:56:00 +0800 |
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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
> > Cc: stable@vger.kernel.org > Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com> > --- > drivers/usb/host/xhci-pci.c | 5 ++++- > 1 file changed, 4 insertions(+), 1 deletion(-) > > diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c > index d9f831b67e57..93ce34bce7b5 100644 > --- a/drivers/usb/host/xhci-pci.c > +++ b/drivers/usb/host/xhci-pci.c > @@ -126,7 +126,10 @@ static void xhci_pci_quirks(struct device *dev, > struct xhci_hcd *xhci) > if (pdev->vendor == PCI_VENDOR_ID_AMD && usb_amd_find_chipset_info()) > xhci->quirks |= XHCI_AMD_PLL_FIX; > > - if (pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x43bb) > + if (pdev->vendor == PCI_VENDOR_ID_AMD && > + (pdev->device == 0x15e0 || > + pdev->device == 0x15e1 || > + pdev->device == 0x43bb)) > xhci->quirks |= XHCI_SUSPEND_DELAY; > > if (pdev->vendor == PCI_VENDOR_ID_AMD) > -- > 2.15.1
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