On 12.12.19 13:39, Felipe Balbi wrote: > > Hi, > > Martin Kepplinger <martin.kepplinger@xxxxxxx> writes: >> [ 64.405226] Modules linked in: rfkill st_magn_spi st_sensors_spi >> mousedev qmi_wwan caam_jr caamhash_desc caamalg_desc cdc_wdm option >> usbnet usb_wwan mii usbserial st_magn_i2c st_magn st_sensors_i2c >> st_sensors industrialio_triggered_buffer goodix kfifo_buf tcpci tcpm >> roles imx2_wdt watchdog aes_ce_blk crypto_simd typec bq25890_charger >> caam imx_sdma virt_dma error crct10dif_ce ghash_ce sha2_ce sha1_ce >> gpio_vibra usb_f_acm u_serial usb_f_rndis g_multi usb_f_mass_storage >> u_ether libcomposite ip_tables x_tables ipv6 nf_defrag_ipv6 >> xhci_plat_hcd xhci_hcd usbcore dwc3 snvs_pwrkey ulpi udc_core >> phy_fsl_imx8mq_usb usb_common >> [ 64.462126] CPU: 3 PID: 884 Comm: ip Not tainted >> 5.5.0-rc1-next-20191212-librem5-00019-g4fb81fdd9c7d #1 >> [ 64.471909] Hardware name: Purism Librem 5 devkit (DT) >> [ 64.477264] pstate: 60000085 (nZCv daIf -PAN -UAO) >> [ 64.482268] pc : dwc3_stop_active_transfer.constprop.38+0xe8/0x100 [dwc3] >> [ 64.489351] lr : dwc3_stop_active_transfer.constprop.38+0x64/0x100 [dwc3] >> [ 64.496421] sp : ffff00009f213240 >> [ 64.499874] x29: ffff00009f213240 x28: 0000000000000000 >> [ 64.505410] x27: ffff00009f2137b0 x26: ffff0000a4e0cc10 >> [ 64.510946] x25: 0000000000000001 x24: ffff0000a324518c >> [ 64.516482] x23: ffff0000a3245193 x22: ffff0000a41f0080 >> [ 64.522018] x21: 0000000000000000 x20: ffff0000a4176600 >> [ 64.527553] x19: ffff800010ee87c8 x18: 0000000000000000 >> [ 64.533089] x17: 0000000000000000 x16: 0000000000000000 >> [ 64.538625] x15: 0000000000000000 x14: 0000000000000000 >> [ 64.544160] x13: ffff0000a4176868 x12: ffff0000a4176868 >> [ 64.549696] x11: ffffffffffff3f08 x10: 0000000000000008 >> [ 64.555232] x9 : ffffffffffff3f04 x8 : 0000000000000811 >> [ 64.560767] x7 : ffffffffffff3f00 x6 : ffffffffffff3f0c >> [ 64.566303] x5 : 0000000000000000 x4 : ffff80001007483c >> [ 64.571839] x3 : 0000000000000808 x2 : ffff00009f21327c >> [ 64.577375] x1 : 0000000000000040 x0 : 00000000ffffff92 >> [ 64.582911] Call trace: >> [ 64.585474] dwc3_stop_active_transfer.constprop.38+0xe8/0x100 [dwc3] >> [ 64.592194] __dwc3_gadget_ep_disable+0x34/0x380 [dwc3] >> [ 64.597649] dwc3_gadget_ep_disable+0x44/0xf8 [dwc3] >> [ 64.602841] usb_ep_disable+0x34/0x100 [udc_core] >> [ 64.607749] eth_stop+0xb4/0x130 [u_ether] >> [ 64.612026] __dev_close_many+0xb4/0x138 >> [ 64.616116] __dev_change_flags+0xb8/0x1d0 >> [ 64.620385] dev_change_flags+0x28/0x68 >> [ 64.624384] do_setlink+0x30c/0xc90 >> [ 64.628021] __rtnl_newlink+0x3f8/0x788 >> [ 64.632018] rtnl_newlink+0x54/0x80 >> [ 64.635654] rtnetlink_rcv_msg+0x128/0x370 >> [ 64.639926] netlink_rcv_skb+0x60/0x120 >> [ 64.643924] rtnetlink_rcv+0x1c/0x28 >> [ 64.647650] netlink_unicast+0x1b8/0x278 >> [ 64.651739] netlink_sendmsg+0x1ac/0x3b0 >> [ 64.655829] ____sys_sendmsg+0x250/0x298 >> [ 64.659918] ___sys_sendmsg+0x88/0xc8 >> [ 64.663735] __sys_sendmsg+0x70/0xc0 >> [ 64.667463] __arm64_sys_sendmsg+0x28/0x30 >> [ 64.671736] el0_svc_common.constprop.3+0x98/0x170 >> [ 64.676729] el0_svc_handler+0x20/0x28 >> [ 64.680638] el0_sync_handler+0x134/0x1a0 >> [ 64.684817] el0_sync+0x140/0x180 >> [ 64.688271] ---[ end trace 4f6aa846a9c6f20c ]--- >> >> ... again. at every shutdown or rmmod. >> >> I hope that this might be already helpful. > > I need to see the trace events for this failure case too. You could add > ftrace_dump_on_oops to your cmdline and change the WARN_ONCE() to a > BUG_ON() or something. > doing that and having "ftrace=function ftrace_dump_on_oops" dumps way too much to handle and somehow my board resets while printing... I found I can avoid the above error during shutdown though by keeping a few regulators enabled for now. I'm not entirely sure if that's a dwc3 problem now, so let's leave the above for now. Back to my first issue: disconnected USB and suspend: I disable all gadget configs now. "echo mem > /sys/power/state" still only hangs the system - again: all that's in the logs is: [ 97.405251] PM: suspend entry (deep) and on the console then: [ 118.608738] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 118.615093] rcu: 1-...0: (0 ticks this GP) idle=e86/1/0x4000000000000000 softirq=16109/16109 fqs=2626 [ 181.628739] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 181.635088] rcu: 1-...0: (0 ticks this GP) idle=e86/1/0x4000000000000000 softirq=16109/16109 fqs=10503 [ 244.648738] rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: [ 244.655087] rcu: 1-...0: (0 ticks this GP) idle=e86/1/0x4000000000000000 softirq=16109/16109 fqs=17402 ... not sure how to further debug that.
