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SubjectRE: [lkp] [usb] 22bf2bb019: WARNING: CPU: 0 PID: 0 at include/linux/usb/gadget.h:405 composite_ep0_queue+0xad/0xd0()
Date
> FYI, we noticed the below changes on
>
> https://github.com/0day-ci/linux changbin-du-intel-com/usb-gadget-forbid-
> queuing-request-to-a-disabled-ep/20151214-115939
> commit 22bf2bb019c7f92cda32c46b95715b0b208052d0 ("usb: gadget: forbid
> queuing request to a disabled ep")
>
>
> [ 8.157994] dummy_hcd dummy_hcd.0: port status 0x00100503 has changes
> [ 8.209686] usb 1-1: new high-speed USB device number 2 using
> dummy_hcd
> [ 8.211689] ------------[ cut here ]------------
> [ 8.212267] WARNING: CPU: 0 PID: 0 at include/linux/usb/gadget.h:405
> composite_ep0_queue+0xad/0xd0()
> [ 8.213684] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.0-rc4-00001-
> g22bf2bb #1
> [ 8.214580] 00000000 00000000 54407de4 4125cd9f 00000000 54407e14
> 4109e21e 420f34b4
> [ 8.215626] 00000000 00000000 421bdc84 00000195 41761a1d 41761a1d
> 4d810ea8 4d810ea8
> [ 8.216679] ffffff94 54407e24 4109e2eb 00000009 00000000 54407e48
> 41761a1d 00000001
> [ 8.217726] Call Trace:
> [ 8.218029] [<4125cd9f>] dump_stack+0x48/0x69
> [ 8.218570] [<4109e21e>] warn_slowpath_common+0x7e/0xb0
> [ 8.219204] [<41761a1d>] ? composite_ep0_queue+0xad/0xd0
> [ 8.219972] [<41761a1d>] ? composite_ep0_queue+0xad/0xd0
> [ 8.220741] [<4109e2eb>] warn_slowpath_null+0x1b/0x20
> [ 8.221362] [<41761a1d>] composite_ep0_queue+0xad/0xd0
> [ 8.222105] [<41762055>] composite_setup+0x615/0x19e0
> [ 8.222723] [<41769eba>] ? dummy_timer+0x4a/0xe30
> [ 8.223299] [<4176a86d>] dummy_timer+0x9fd/0xe30
> [ 8.223872] [<41769e70>] ? dummy_start+0x140/0x140
> [ 8.224461] [<410f2cef>] call_timer_fn+0x6f/0xf0
> [ 8.225025] [<410f2cb2>] ? call_timer_fn+0x32/0xf0
> [ 8.225612] [<410f2eb1>] run_timer_softirq+0x141/0x1d0
> [ 8.226234] [<41769e70>] ? dummy_start+0x140/0x140
> [ 8.226827] [<410a0d8d>] __do_softirq+0xbd/0x1c0
> [ 8.227397] [<410a0cd0>] ? _local_bh_enable+0x50/0x50
> [ 8.228013] [<4104f376>] do_softirq_own_stack+0x26/0x40
> [ 8.228651] <IRQ> [<410a1085>] irq_exit+0x65/0x70
> [ 8.229258] [<4107ea7e>] smp_trace_apic_timer_interrupt+0x5e/0x90
> [ 8.229993] [<4107eab8>] smp_apic_timer_interrupt+0x8/0x10
> [ 8.230666] [<41d78a5d>] apic_timer_interrupt+0x2d/0x34
> [ 8.231309] [<410861f5>] ? native_safe_halt+0x5/0x10
> [ 8.231917] [<41055198>] default_idle+0x8/0x10
> [ 8.232467] [<41055919>] arch_cpu_idle+0x9/0x10
> [ 8.233016] [<410d55d3>] default_idle_call+0x23/0x30
> [ 8.233627] [<410d573c>] cpu_startup_entry+0x15c/0x240
> [ 8.234260] [<41d6f31a>] rest_init+0xaa/0xb0
> [ 8.234782] [<42327b05>] start_kernel+0x3df/0x3e4
> [ 8.235363] [<423272c3>] i386_start_kernel+0x91/0x95
> [ 8.235971] ---[ end trace a9973fc5ac55cb31 ]---
> [ 8.236529] g_ether gadget: ep_queue --> -108
>
>
> Thanks,
> Ying Huang
Hmm, it because the ep0 'enabled' is not set. Ep0 is not enabled by usb_ep_enable, but in UDC driver.
It need a fix.
This is an interesting robot testing tool. Thanks!

Du, Changbin


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