https://bugzilla.kernel.org/show_bug.cgi?id=214021 --- Comment #5 from Chris Chiu (chris.chiu@xxxxxxxxxxxxx) --- I add printks to trace where the error happens. The dmesg show as down below [ 44.488980] xhci_hcd 0000:00:14.0: FIXME: allocate a command ring segment [ 44.488981] usb_alloc_dev: hcd driver alloc dev exist but return 0 [ 44.488982] usb usb1-port4: couldn't allocate usb_device The first line show for the "xhci_dbg(xhci, "FIXME: allocate a command ring segment\n");" in xhci_alloc_dev() The second line shows the printk I add in usb_alloc_dev() /* Root hubs aren't true devices, so don't allocate HCD resources */ if (usb_hcd->driver->alloc_dev && parent && !usb_hcd->driver->alloc_dev(usb_hcd, dev)) { + printk("%s: hcd driver alloc dev exist but return 0", __func__); usb_put_hcd(bus_to_hcd(bus)); kfree(dev); return NULL; } The usb_hcd->driver->alloc_dev is equal to xhci_alloc_dev and fails the xhci_queue_slot_control(). Does that mean anything regarding this? -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
