On Mon, Jan 17, 2022 at 11:00:05AM +0800, Kai-Heng Feng wrote: > On Thu, Dec 30, 2021 at 1:28 PM Kai-Heng Feng > <kai.heng.feng@xxxxxxxxxxxxx> wrote: > > > > Unplugging USB device may cause an incorrect warm reset loop and the > > port can no longer be used: > > [ 143.039019] xhci_hcd 0000:00:14.0: Port change event, 2-3, id 19, portsc: 0x4202c0 > > [ 143.039025] xhci_hcd 0000:00:14.0: handle_port_status: starting usb2 port polling. > > [ 143.039051] hub 2-0:1.0: state 7 ports 10 chg 0000 evt 0008 > > [ 143.039058] xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x4202c0, return 0x4102c0 > > [ 143.039092] xhci_hcd 0000:00:14.0: clear port3 connect change, portsc: 0x4002c0 > > [ 143.039096] usb usb2-port3: link state change > > [ 143.039099] xhci_hcd 0000:00:14.0: clear port3 link state change, portsc: 0x2c0 > > [ 143.039101] usb usb2-port3: do warm reset > > [ 143.096736] xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x2b0, return 0x2b0 > > [ 143.096751] usb usb2-port3: not warm reset yet, waiting 50ms > > [ 143.131500] xhci_hcd 0000:00:14.0: Can't queue urb, port error, link inactive > > [ 143.138260] xhci_hcd 0000:00:14.0: Port change event, 2-3, id 19, portsc: 0x2802a0 > > [ 143.138263] xhci_hcd 0000:00:14.0: handle_port_status: starting usb2 port polling. > > [ 143.160756] xhci_hcd 0000:00:14.0: Get port status 2-3 read: 0x2802a0, return 0x3002a0 > > [ 143.160798] usb usb2-port3: not warm reset yet, waiting 200ms > > > > The port status is PP=1, CCS=0, PED=0, PLS=Inactive, which is Error > > state per "USB3 Root Hub Port State Machine". It's reasonable to perform > > warm reset several times, but if the port is still not enabled after > > many attempts, consider it's gone and treat it as disconnected. > > > > Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> > > A gentle ping... It's the merge window, I can't do anything, sorry. Please wait until after 5.17-rc1 is out. thanks, greg k-h
