On Thu, Nov 29, 2018 at 04:20:01PM +0800, Aaron Ma wrote: > commit 958c0bd86075d4ef1c936998deefe1947e539240 upstream. > > Realtek USB3.0 Card Reader [0bda:0328] reports wrong port status on > Cannon lake PCH USB3.1 xHCI [8086:a36d] after resume from S3, > after clear port reset it works fine. > > Since this device is registered on USB3 roothub at boot, > when port status reports not superspeed, xhci_get_port_status will call > an uninitialized completion in bus_state[0]. > Kernel will hang because of NULL pointer. > > Restrict the USB2 resume status check in USB2 roothub to fix hang issue. > > Cc: stable@xxxxxxxxxxxxxxx # 4.17.x- Didn't work on 4.14.y, but I fixed it up there by hand... thanks, greg k-h
