> Also removing the XHCI_LPM_SUPPORT flag should do the trick, for example for Intel hosts:
>
> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> index 2be1b7b..8f2eafb 100644
> --- a/drivers/usb/host/xhci-pci.c
> +++ b/drivers/usb/host/xhci-pci.c
> @@ -127,7 +127,6 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
> xhci->quirks |= XHCI_TRUST_TX_LENGTH;
>
> if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
> - xhci->quirks |= XHCI_LPM_SUPPORT;
> xhci->quirks |= XHCI_INTEL_HOST;
> xhci->quirks |= XHCI_AVOID_BEI;
> }
>
> I can't remember any way to do this runtime
I'm experiencing the same random disconnect/connect issue with xhci as Hans-Peter. My HDD enclosure is based on ASMedia 1051 (vid=174c, pid=55aa)
I was also suspecting USB3 hardware LPM and didn't know how to disable it as well. So I removed the line suggested by Mathias and recompiled the kernel. No changes. My usbmon output is also attached.
The enclosure works perfectly in xhci mode under Windows 7 with Intel USB3.0 drivers. It also works perfectly under Linux in ehci mode as well as in xhci mode on a different host (older USB 3.0 controller from a different vendor).
EugenAttachment:
usbmon.out.gz
Description: Binary data
