Hi all, Am So., 19. Sept. 2021 um 08:58 Uhr schrieb Heiko Thiery <heiko.thiery@xxxxxxxxx>: > > Hi all, > > I see the following crash on a imx8mm board implementation. I cannot > find a reason for this at the moment. This can be reproduced with the > imx8mm-kontron-n801x-s dtb.Has anyone seen the same issue? > > The position in the code is here: > https://elixir.bootlin.com/linux/latest/source/drivers/usb/chipidea/usbmisc_imx.c#L819 > > [ 1.489344] Unable to handle kernel NULL pointer dereference at > virtual address 0000000000000098 > [ 1.498170] Mem abort info: > [ 1.500966] ESR = 0x96000044 > [ 1.504030] EC = 0x25: DABT (current EL), IL = 32 bits > [ 1.509356] SET = 0, FnV = 0 > [ 1.512416] EA = 0, S1PTW = 0 > [ 1.515569] FSC = 0x04: level 0 translation fault > [ 1.520458] Data abort info: > [ 1.523349] ISV = 0, ISS = 0x00000044 > [ 1.527196] CM = 0, WnR = 1 > [ 1.530176] [0000000000000098] user address but active_mm is swapper > [ 1.536544] Internal error: Oops: 96000044 [#1] PREEMPT SMP > [ 1.542125] Modules linked in: > [ 1.545190] CPU: 3 PID: 7 Comm: kworker/u8:0 Not tainted 5.14.0-dirty #3 > [ 1.551901] Hardware name: Kontron i.MX8MM N801X S (DT) > [ 1.557133] Workqueue: events_unbound deferred_probe_work_func > [ 1.562984] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--) > [ 1.568998] pc : imx7d_charger_detection+0x3f0/0x510 > [ 1.573973] lr : imx7d_charger_detection+0x22c/0x510 > [ 1.578947] sp : ffff800011f1b5d0 > [ 1.582266] x29: ffff800011f1b5d0 x28: 0000000000000000 x27: 0000000000000000 > [ 1.589416] x26: ffff000000294c10 x25: ffff800011a6d678 x24: ffff000002ff3680 > [ 1.596567] x23: ffff000002ff3688 x22: ffff000002ff3680 x21: 0000000000000000 > [ 1.603715] x20: 0000000000000000 x19: ffff000003118a80 x18: 0000000000000001 > [ 1.610867] x17: 000000040044ffff x16: 00400032b5503510 x15: 0000000000000000 > [ 1.618019] x14: ffff0000000d44c0 x13: ffff80002e7ed000 x12: 0000000034d4d91d > [ 1.625172] x11: 0000000000000000 x10: 0000000000000960 x9 : ffff800011f1b460 > [ 1.632321] x8 : ffff00003fdb1d40 x7 : ffff00003fdb7f00 x6 : 0000000004ce61f4 > [ 1.639475] x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 > [ 1.646625] x2 : 11246917acc78900 x1 : 0000000000000000 x0 : 0000000000000001 > [ 1.653779] Call trace: > [ 1.656230] imx7d_charger_detection+0x3f0/0x510 > [ 1.660854] imx_usbmisc_charger_detection+0x40/0xc8 > [ 1.665825] ci_hdrc_imx_notify_event+0xec/0x120 > [ 1.670455] ci_udc_vbus_session+0x70/0xa0 > [ 1.674560] usb_gadget_vbus_connect+0x20/0x38 > [ 1.679013] ci_handle_vbus_change+0x64/0x70 > [ 1.683290] ci_hdrc_probe+0x4e0/0x838 > [ 1.687047] platform_probe+0x68/0xd8 > [ 1.690717] really_probe+0xb0/0x318 > [ 1.694300] __driver_probe_device+0x78/0xe0 > [ 1.698576] driver_probe_device+0xb0/0x110 > [ 1.702767] __device_attach_driver+0x90/0xe0 > [ 1.707131] bus_for_each_drv+0x7c/0xd0 > [ 1.710974] __device_attach+0xe8/0x148 > [ 1.714816] device_initial_probe+0x14/0x20 > [ 1.719009] bus_probe_device+0x9c/0xa8 > [ 1.722852] device_add+0x3f0/0x840 > [ 1.726349] platform_device_add+0x110/0x238 > [ 1.730626] ci_hdrc_add_device+0x538/0x5a8 > [ 1.734818] ci_hdrc_imx_probe+0x3fc/0x810 > [ 1.738927] platform_probe+0x68/0xd8 > [ 1.742598] really_probe+0xb0/0x318 > [ 1.746178] __driver_probe_device+0x78/0xe0 > [ 1.750458] driver_probe_device+0xb0/0x110 > [ 1.754651] __device_attach_driver+0x90/0xe0 > [ 1.759013] bus_for_each_drv+0x7c/0xd0 > [ 1.762858] __device_attach+0xe8/0x148 > [ 1.766703] device_initial_probe+0x14/0x20 > [ 1.770896] bus_probe_device+0x9c/0xa8 > [ 1.774739] deferred_probe_work_func+0x88/0xc0 > [ 1.779278] process_one_work+0x1e8/0x360 > [ 1.783295] worker_thread+0x210/0x480 > [ 1.787049] kthread+0x150/0x160 > [ 1.790284] ret_from_fork+0x10/0x18 > [ 1.793873] Code: a8c47bfd d50323bf d65f03c0 52800020 (b9009aa0) > [ 1.799975] ---[ end trace d43a19cb0f4746b6 ]--- Meanwhile I figured out that in ci_hdrc_imx_probe() the "fsl,usbphy" node is not found [1]. But I do not understand why. The following failure leads to the return code of -19 (ENODEV) and sets the pyh to NULL: "failed to get fsl,usbphy phandle in /soc@0/bus@32c00000/usb@32e40000 node" [1] https://elixir.bootlin.com/linux/latest/source/drivers/usb/chipidea/ci_hdrc_imx.c#L420 -- Heiko
