https://bugzilla.kernel.org/show_bug.cgi?id=209555 --- Comment #1 from Tomasz Grobelny (tomasz@xxxxxxxxxxxx) --- Here is annotated dmesg without debugging info: [ 31.709214] USB_PWR_EN: disabling //here I connect the cable and run my program [ 54.771552] Mass Storage Function, version: 2009/09/11 [ 54.771561] LUN: removable file: (no medium) [ 54.781721] file system registered [ 54.782484] read descriptors [ 54.782495] read strings [ 54.786939] dwc2 ff400000.usb: bound driver configfs-gadget [ 54.976434] dwc2 ff400000.usb: new device is high-speed [ 55.090994] dwc2 ff400000.usb: new device is high-speed [ 55.142436] dwc2 ff400000.usb: new address 4 [ 56.219325] ffs_data_put(): freeing [ 56.219828] unloading //here the switch to AOA mode happens: it is as if the device was disconected and entirely new device (different vid, pid) connected [ 56.257710] file system registered [ 56.258362] read descriptors [ 56.258373] read strings [ 56.262135] dwc2 ff400000.usb: bound driver configfs-gadget [ 56.454364] dwc2 ff400000.usb: new device is high-speed [ 56.568367] dwc2 ff400000.usb: new device is high-speed [ 56.620390] dwc2 ff400000.usb: new address 5 // here the cable is disconnected [ 79.288505] dwc2 ff400000.usb: dwc2_hsotg_ep_stop_xfr: timeout DIEPINT.NAKEFF [ 79.288625] dwc2 ff400000.usb: dwc2_hsotg_ep_stop_xfr: timeout DOEPCTL.EPDisable [ 79.299850] dwc2 ff400000.usb: dwc2_flush_tx_fifo: HANG! AHB Idle GRSCTL [ 79.299982] dwc2 ff400000.usb: dwc2_hsotg_ep_stop_xfr: timeout GINTSTS.GOUTNAKEFF [ 79.300105] dwc2 ff400000.usb: dwc2_hsotg_ep_stop_xfr: timeout DOEPCTL.EPDisable [ 79.307060] ffs_data_put(): freeing [ 79.307355] unloading // rmmod dwc2 && modprobe dwc2 [ 119.388282] dwc2 ff400000.usb: supply vusb_d not found, using dummy regulator [ 119.388349] dwc2 ff400000.usb: supply vusb_a not found, using dummy regulator [ 119.388500] dwc2 ff400000.usb: Bad value for GSNPSID: 0x00000000 // run my program again, as you see it doesn't reach the "bound driver configfs-gadget" line seen above [ 255.814129] Mass Storage Function, version: 2009/09/11 [ 255.814138] LUN: removable file: (no medium) [ 255.814545] file system registered [ 255.815119] read descriptors [ 255.815128] read strings -- You are receiving this mail because: You are watching the assignee of the bug.
