On 12/15/2015 3:49 PM, Heiko Stübner wrote: > Hi, > > it seems the recent dwc2 additions to the testing/next branch [0] caused > some interesting issue for me. > > Setting is a regular 4.4-rc3/4 (only with some display-stuff added), and the > testing/next branch merged in. > > If I attach a single usb device everything still works fine, but once it > is connected through a hub, like the following: > > root@localhost:~# lsusb -t > /: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=ehci-platform/1p, 480M > |__ Port 1: Dev 2, If 0, Class=Video, Driver=, 480M > |__ Port 1: Dev 2, If 1, Class=Video, Driver=, 480M > /: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=dwc2/1p, 480M > |__ Port 1: Dev 2, If 0, Class=Hub, Driver=hub/5p, 480M > |__ Port 1: Dev 3, If 0, Class=Vendor Specific Class, Driver=smsc95xx, 480M > |__ Port 2: Dev 4, If 0, Class=Mass Storage, Driver=usb-storage, 480M > > I get strange results when powering off the device with the usb device > still attached. > > On regular 4.4-rc3 > root@localhost:~# poweroff > ... > reboot: Power down > ~20sec delay before actual poweroff > [that delay is only present with a usb hub in between, probably due to the > big number of interrupts it creates] > > > With testing/next the device cannot poweroff anymore and instead I get > [ 40.117160] reboot: Power down > [ 68.031372] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [systemd-shutdow:1] > [ 68.046575] Modules linked in: > [ 68.053084] irq event stamp: 1654975 > [ 68.060091] hardirqs last enabled at (1654974): [<c00156fc>] __irq_svc+0x5c/0x78 > [ 68.074935] hardirqs last disabled at (1654975): [<c00156e8>] __irq_svc+0x48/0x78 > [ 68.089666] softirqs last enabled at (1654846): [<c002ef84>] __do_softirq+0x358/0x49c > [ 68.105261] softirqs last disabled at (1654847): [<c002f400>] irq_exit+0x94/0xd4 > [ 68.120027] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 4.4.0-rc4+ #2761 > [ 68.133507] Hardware name: Rockchip (Device Tree) > [ 68.142690] task: ee900d40 ti: ee902000 task.ti: ee902000 > [ 68.153237] PC is at rcu_lockdep_current_cpu_online+0x6c/0x90 > [ 68.164438] LR is at rcu_read_lock_held+0x38/0x58 > [ 68.173683] pc : [<c0095e98>] lr : [<c0094d00>] psr: 00010113 > [ 68.173683] sp : ee903be8 ip : ee903bf8 fp : ee903bf4 > [ 68.195300] r10: c0b884f8 r9 : 00000000 r8 : c0b884f8 > [ 68.205429] r7 : ffffbccc r6 : eed7f680 r5 : 00000001 r4 : ee955800 > [ 68.217938] r3 : ee902028 r2 : 0000000f r1 : c0b1891c r0 : 00000001 > [ 68.230482] Flags: nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none > [ 68.244141] Control: 10c5387d Table: 2dae806a DAC: 00000051 > [ 68.255283] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 4.4.0-rc4+ #2761 > [ 68.268720] Hardware name: Rockchip (Device Tree) > [ 68.278165] [<c0019914>] (unwind_backtrace) from [<c0014bcc>] (show_stack+0x20/0x24) > [ 68.293198] [<c0014bcc>] (show_stack) from [<c02c4584>] (dump_stack+0x84/0xb8) > [ 68.307285] [<c02c4584>] (dump_stack) from [<c0010d74>] (show_regs+0x1c/0x20) > [ 68.321205] [<c0010d74>] (show_regs) from [<c00d993c>] (watchdog_timer_fn+0x1c8/0x250) > [ 68.336579] [<c00d993c>] (watchdog_timer_fn) from [<c00a0e0c>] (__hrtimer_run_queues+0x2cc/0x55c) > [ 68.353819] [<c00a0e0c>] (__hrtimer_run_queues) from [<c00a12a0>] (hrtimer_interrupt+0xac/0x1f8) > [ 68.370795] [<c00a12a0>] (hrtimer_interrupt) from [<c04f1714>] (arch_timer_handler_phys+0x38/0x48) > [ 68.388044] [<c04f1714>] (arch_timer_handler_phys) from [<c008fd34>] (handle_percpu_devid_irq+0x15c/0x314) > [ 68.406687] [<c008fd34>] (handle_percpu_devid_irq) from [<c008b4b8>] (generic_handle_irq+0x28/0x38) > [ 68.424177] [<c008b4b8>] (generic_handle_irq) from [<c008b830>] (__handle_domain_irq+0x9c/0xc4) > [ 68.440945] [<c008b830>] (__handle_domain_irq) from [<c0009518>] (gic_handle_irq+0x58/0x80) > [ 68.457054] [<c0009518>] (gic_handle_irq) from [<c00156f8>] (__irq_svc+0x58/0x78) > [ 68.471405] Exception stack(0xee903b98 to 0xee903be0) > [ 68.481288] 3b80: 00000001 c0b1891c > [ 68.497074] 3ba0: 0000000f ee902028 ee955800 00000001 eed7f680 ffffbccc c0b884f8 00000000 > [ 68.512875] 3bc0: c0b884f8 ee903bf4 ee903bf8 ee903be8 c0094d00 c0095e98 00010113 ffffffff > [ 68.528713] [<c00156f8>] (__irq_svc) from [<c0095e98>] (rcu_lockdep_current_cpu_online+0x6c/0x90) > [ 68.545915] [<c0095e98>] (rcu_lockdep_current_cpu_online) from [<c0094d00>] (rcu_read_lock_held+0x38/0x58) > [ 68.564535] [<c0094d00>] (rcu_read_lock_held) from [<c006af0c>] (run_rebalance_domains+0x114/0x3e4) > [ 68.582013] [<c006af0c>] (run_rebalance_domains) from [<c002ee04>] (__do_softirq+0x1d8/0x49c) > [ 68.598529] [<c002ee04>] (__do_softirq) from [<c002f400>] (irq_exit+0x94/0xd4) > [ 68.612591] [<c002f400>] (irq_exit) from [<c008b834>] (__handle_domain_irq+0xa0/0xc4) > [ 68.808119] [<c008b834>] (__handle_domain_irq) from [<c0009518>] (gic_handle_irq+0x58/0x80) > [ 69.004792] [<c0009518>] (gic_handle_irq) from [<c00156f8>] (__irq_svc+0x58/0x78) > [ 69.203767] Exception stack(0xee903d20 to 0xee903d68) > [ 69.402232] 3d20: 00000001 00000010 c134e8f8 ee900d40 00000000 60010013 ee26a834 00000000 > [ 69.608139] 3d40: 00000000 00000000 00000000 ee903db4 00000002 ee903d70 ee9012a8 c007f4bc > [ 69.811985] 3d60: 80010013 ffffffff > [ 70.007318] [<c00156f8>] (__irq_svc) from [<c007f4bc>] (lock_acquire+0x190/0x218) > [ 70.212947] [<c007f4bc>] (lock_acquire) from [<c0758f5c>] (mutex_lock_nested+0x78/0x41c) > [ 70.419796] [<c0758f5c>] (mutex_lock_nested) from [<c03d5838>] (regmap_lock_mutex+0x1c/0x20) > [ 70.630771] [<c03d5838>] (regmap_lock_mutex) from [<c03d8e6c>] (regmap_update_bits+0x34/0x70) > [ 70.842523] [<c03d8e6c>] (regmap_update_bits) from [<c03e5a4c>] (rk808_device_shutdown+0x4c/0x74) > [ 71.056896] [<c03e5a4c>] (rk808_device_shutdown) from [<c0012bc8>] (machine_power_off+0x34/0x3c) > [ 71.271604] [<c0012bc8>] (machine_power_off) from [<c004f3d4>] (kernel_power_off+0x6c/0x80) > [ 71.486193] [<c004f3d4>] (kernel_power_off) from [<c004f588>] (SyS_reboot+0x148/0x1d8) > [ 71.701543] [<c004f588>] (SyS_reboot) from [<c000ff80>] (ret_fast_syscall+0x0/0x1c) > [ 71.920475] Kernel panic - not syncing: softlockup: hung tasks > [ 72.134543] CPU: 0 PID: 1 Comm: systemd-shutdow Tainted: G L 4.4.0-rc4+ #2761 > [ 72.353754] Hardware name: Rockchip (Device Tree) > [ 72.567683] [<c0019914>] (unwind_backtrace) from [<c0014bcc>] (show_stack+0x20/0x24) > [ 72.789719] [<c0014bcc>] (show_stack) from [<c02c4584>] (dump_stack+0x84/0xb8) > [ 73.012087] [<c02c4584>] (dump_stack) from [<c01157e4>] (panic+0x9c/0x210) > [ 73.233823] [<c01157e4>] (panic) from [<c00d9984>] (watchdog_timer_fn+0x210/0x250) > [ 73.456871] [<c00d9984>] (watchdog_timer_fn) from [<c00a0e0c>] (__hrtimer_run_queues+0x2cc/0x55c) > [ 73.683212] [<c00a0e0c>] (__hrtimer_run_queues) from [<c00a12a0>] (hrtimer_interrupt+0xac/0x1f8) > [ 73.909999] [<c00a12a0>] (hrtimer_interrupt) from [<c04f1714>] (arch_timer_handler_phys+0x38/0x48) > [ 74.137596] [<c04f1714>] (arch_timer_handler_phys) from [<c008fd34>] (handle_percpu_devid_irq+0x15c/0x314) > [ 74.367459] [<c008fd34>] (handle_percpu_devid_irq) from [<c008b4b8>] (generic_handle_irq+0x28/0x38) > [ 74.596433] [<c008b4b8>] (generic_handle_irq) from [<c008b830>] (__handle_domain_irq+0x9c/0xc4) > [ 74.826935] [<c008b830>] (__handle_domain_irq) from [<c0009518>] (gic_handle_irq+0x58/0x80) > [ 75.057263] [<c0009518>] (gic_handle_irq) from [<c00156f8>] (__irq_svc+0x58/0x78) > [ 75.285610] Exception stack(0xee903b98 to 0xee903be0) > [ 75.509201] 3b80: 00000001 c0b1891c > [ 75.737970] 3ba0: 0000000f ee902028 ee955800 00000001 eed7f680 ffffbccc c0b884f8 00000000 > [ 75.965750] 3bc0: c0b884f8 ee903bf4 ee903bf8 ee903be8 c0094d00 c0095e98 00010113 ffffffff > [ 76.193210] [<c00156f8>] (__irq_svc) from [<c0095e98>] (rcu_lockdep_current_cpu_online+0x6c/0x90) > [ 76.422735] [<c0095e98>] (rcu_lockdep_current_cpu_online) from [<c0094d00>] (rcu_read_lock_held+0x38/0x58) > [ 76.654439] [<c0094d00>] (rcu_read_lock_held) from [<c006af0c>] (run_rebalance_domains+0x114/0x3e4) > [ 76.885606] [<c006af0c>] (run_rebalance_domains) from [<c002ee04>] (__do_softirq+0x1d8/0x49c) > [ 77.116138] [<c002ee04>] (__do_softirq) from [<c002f400>] (irq_exit+0x94/0xd4) > [ 77.342544] [<c002f400>] (irq_exit) from [<c008b834>] (__handle_domain_irq+0xa0/0xc4) > [ 77.569812] [<c008b834>] (__handle_domain_irq) from [<c0009518>] (gic_handle_irq+0x58/0x80) > [ 77.801452] [<c0009518>] (gic_handle_irq) from [<c00156f8>] (__irq_svc+0x58/0x78) > [ 78.030528] Exception stack(0xee903d20 to 0xee903d68) > [ 78.254326] 3d20: 00000001 00000010 c134e8f8 ee900d40 00000000 60010013 ee26a834 00000000 > [ 78.483633] 3d40: 00000000 00000000 00000000 ee903db4 00000002 ee903d70 ee9012a8 c007f4bc > [ 78.710987] 3d60: 80010013 ffffffff > [ 78.929606] [<c00156f8>] (__irq_svc) from [<c007f4bc>] (lock_acquire+0x190/0x218) > [ 79.156074] [<c007f4bc>] (lock_acquire) from [<c0758f5c>] (mutex_lock_nested+0x78/0x41c) > [ 79.383616] [<c0758f5c>] (mutex_lock_nested) from [<c03d5838>] (regmap_lock_mutex+0x1c/0x20) > [ 79.611793] [<c03d5838>] (regmap_lock_mutex) from [<c03d8e6c>] (regmap_update_bits+0x34/0x70) > [ 79.839125] [<c03d8e6c>] (regmap_update_bits) from [<c03e5a4c>] (rk808_device_shutdown+0x4c/0x74) > [ 80.066755] [<c03e5a4c>] (rk808_device_shutdown) from [<c0012bc8>] (machine_power_off+0x34/0x3c) > [ 80.296308] [<c0012bc8>] (machine_power_off) from [<c004f3d4>] (kernel_power_off+0x6c/0x80) > [ 80.525430] [<c004f3d4>] (kernel_power_off) from [<c004f588>] (SyS_reboot+0x148/0x1d8) > [ 80.753737] [<c004f588>] (SyS_reboot) from [<c000ff80>] (ret_fast_syscall+0x0/0x1c) > [ 80.986626] ---[ end Kernel panic - not syncing: softlockup: hung tasks > > > There are more pending patches I haven't looked at - so maybe one of them > improves that, but maybe one of you also has some idea :-) . > > > Heiko > > > [0] https://git.kernel.org/cgit/linux/kernel/git/balbi/usb.git/log/?h=testing/next > > Hi Heiko, Felipe's testing/next tree has some commits on it that I found problems with and that I'm reworking now. I'm not sure if anything there is related. You can try from commit a105c257 to see if it resolves it. Or you can wait until I resubmit those patches. Regards, John -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
