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/20151217-180958
commit 6ee844ac2efe94605f8b630053739fdae8fd617c ("usb: gadget: forbid queuing request to a disabled ep")
+--------------------------------------------------------------+----------+------------+
| | v4.4-rc4 | 6ee844ac2e |
+--------------------------------------------------------------+----------+------------+
| boot_successes | 42 | 0 |
| boot_failures | 5 | 12 |
| IP-Config:Auto-configuration_of_network_failed | 5 | 4 |
| WARNING:at_include/linux/usb/gadget.h:#composite_ep0_queue() | 0 | 12 |
| backtrace:cpu_startup_entry | 0 | 6 |
| backtrace:power_supply_register | 0 | 1 |
| backtrace:test_power_init | 0 | 1 |
| backtrace:kernel_init_freeable | 0 | 1 |
+--------------------------------------------------------------+----------+------------+
[ 11.146956] usbcore: registered new interface driver i2c-diolan-u2c
[ 11.148476] ------------[ cut here ]------------
[ 11.148476] ------------[ cut here ]------------
[ 11.148484] WARNING: CPU: 0 PID: 0 at include/linux/usb/gadget.h:405 composite_ep0_queue+0x93/0xa4()
[ 11.148484] WARNING: CPU: 0 PID: 0 at include/linux/usb/gadget.h:405 composite_ep0_queue+0x93/0xa4()
[ 11.148486] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.0-rc4-00001-g6ee844a #1
[ 11.148486] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.4.0-rc4-00001-g6ee844a #1
[ 11.148487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 11.148487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Debian-1.8.2-1 04/01/2014
[ 11.148490] 0000000000000000 ffff880013803ca0 ffffffff813ce682 0000000000000000
[ 11.148490] 0000000000000000 ffff880013803ca0 ffffffff813ce682 0000000000000000
[ 11.148492] ffff880013803cd8 ffffffff810b0757 ffffffff815f7c44 ffff8800102d8500
[ 11.148492] ffff880013803cd8 ffffffff810b0757 ffffffff815f7c44 ffff8800102d8500
[ 11.148495] ffff8800102d85e8 00000000ffffff94 0000000000000000 ffff880013803ce8
[ 11.148495] ffff8800102d85e8 00000000ffffff94 0000000000000000 ffff880013803ce8
[ 11.148495] Call Trace:
[ 11.148495] Call Trace:
[ 11.148499] <IRQ> [<ffffffff813ce682>] dump_stack+0x4b/0x6c
[ 11.148499] <IRQ> [<ffffffff813ce682>] dump_stack+0x4b/0x6c
[ 11.148503] [<ffffffff810b0757>] warn_slowpath_common+0x8a/0xa3
[ 11.148503] [<ffffffff810b0757>] warn_slowpath_common+0x8a/0xa3
[ 11.148505] [<ffffffff815f7c44>] ? composite_ep0_queue+0x93/0xa4
[ 11.148505] [<ffffffff815f7c44>] ? composite_ep0_queue+0x93/0xa4
[ 11.148506] [<ffffffff810b082e>] warn_slowpath_null+0x15/0x17
[ 11.148506] [<ffffffff810b082e>] warn_slowpath_null+0x15/0x17
[ 11.148508] [<ffffffff815f7c44>] composite_ep0_queue+0x93/0xa4
[ 11.148508] [<ffffffff815f7c44>] composite_ep0_queue+0x93/0xa4
[ 11.148510] [<ffffffff815f8b40>] composite_setup+0xeeb/0x103c
[ 11.148510] [<ffffffff815f8b40>] composite_setup+0xeeb/0x103c
[ 11.148514] [<ffffffff810e45af>] ? lock_acquire+0x99/0xa8
[ 11.148514] [<ffffffff810e45af>] ? lock_acquire+0x99/0xa8
[ 11.148517] [<ffffffff815fecf7>] ? dummy_timer+0xa17/0xa6b
[ 11.148517] [<ffffffff815fecf7>] ? dummy_timer+0xa17/0xa6b
[ 11.148519] [<ffffffff815fed10>] dummy_timer+0xa30/0xa6b
[ 11.148519] [<ffffffff815fed10>] dummy_timer+0xa30/0xa6b
[ 11.148520] [<ffffffff810e4597>] ? lock_acquire+0x81/0xa8
[ 11.148520] [<ffffffff810e4597>] ? lock_acquire+0x81/0xa8
[ 11.148522] [<ffffffff810e4597>] ? lock_acquire+0x81/0xa8
[ 11.148522] [<ffffffff810e4597>] ? lock_acquire+0x81/0xa8
[ 11.148524] [<ffffffff815fe2e0>] ? dummy_udc_probe+0x17c/0x17c
[ 11.148524] [<ffffffff815fe2e0>] ? dummy_udc_probe+0x17c/0x17c
[ 11.148525] [<ffffffff815fe2e0>] ? dummy_udc_probe+0x17c/0x17c
[ 11.148525] [<ffffffff815fe2e0>] ? dummy_udc_probe+0x17c/0x17c
[ 11.148529] [<ffffffff810fa7e6>] call_timer_fn+0x63/0xcd
[ 11.148529] [<ffffffff810fa7e6>] call_timer_fn+0x63/0xcd
[ 11.148530] [<ffffffff810fa783>] ? process_timeout+0xb/0xb
[ 11.148530] [<ffffffff810fa783>] ? process_timeout+0xb/0xb
[ 11.148532] [<ffffffff810facb2>] run_timer_softirq+0x19f/0x1c8
[ 11.148532] [<ffffffff810facb2>] run_timer_softirq+0x19f/0x1c8
[ 11.148534] [<ffffffff810b3b5b>] __do_softirq+0x106/0x22b
[ 11.148534] [<ffffffff810b3b5b>] __do_softirq+0x106/0x22b
[ 11.148536] [<ffffffff810b3eb8>] irq_exit+0x58/0xd5
[ 11.148536] [<ffffffff810b3eb8>] irq_exit+0x58/0xd5
[ 11.148539] [<ffffffff8102a169>] smp_trace_apic_timer_interrupt+0x6c/0x79
[ 11.148539] [<ffffffff8102a169>] smp_trace_apic_timer_interrupt+0x6c/0x79
[ 11.148541] [<ffffffff8102a17f>] smp_apic_timer_interrupt+0x9/0xb
[ 11.148541] [<ffffffff8102a17f>] smp_apic_timer_interrupt+0x9/0xb
[ 11.148545] [<ffffffff817d8601>] apic_timer_interrupt+0x91/0xa0
[ 11.148545] [<ffffffff817d8601>] apic_timer_interrupt+0x91/0xa0
[ 11.148549] <EOI> [<ffffffff81031f9e>] ? native_safe_halt+0x6/0x8
[ 11.148549] <EOI> [<ffffffff81031f9e>] ? native_safe_halt+0x6/0x8
[ 11.148551] [<ffffffff8100aae2>] default_idle+0xe/0x12
[ 11.148551] [<ffffffff8100aae2>] default_idle+0xe/0x12
[ 11.148552] [<ffffffff8100afff>] arch_cpu_idle+0xa/0xc
[ 11.148552] [<ffffffff8100afff>] arch_cpu_idle+0xa/0xc
[ 11.148554] [<ffffffff810dc2fd>] default_idle_call+0x1e/0x20
[ 11.148554] [<ffffffff810dc2fd>] default_idle_call+0x1e/0x20
[ 11.148555] [<ffffffff810dc483>] cpu_startup_entry+0x13d/0x20f
[ 11.148555] [<ffffffff810dc483>] cpu_startup_entry+0x13d/0x20f
[ 11.148558] [<ffffffff817cd90a>] rest_init+0x131/0x137
[ 11.148558] [<ffffffff817cd90a>] rest_init+0x131/0x137
[ 11.148560] [<ffffffff82094f2d>] start_kernel+0x483/0x490
[ 11.148560] [<ffffffff82094f2d>] start_kernel+0x483/0x490
[ 11.148562] [<ffffffff82094120>] ? early_idt_handler_array+0x120/0x120
[ 11.148562] [<ffffffff82094120>] ? early_idt_handler_array+0x120/0x120
[ 11.148563] [<ffffffff82094315>] x86_64_start_reservations+0x2a/0x2c
[ 11.148563] [<ffffffff82094315>] x86_64_start_reservations+0x2a/0x2c
[ 11.148565] [<ffffffff82094402>] x86_64_start_kernel+0xeb/0xf8
[ 11.148565] [<ffffffff82094402>] x86_64_start_kernel+0xeb/0xf8
[ 11.148588] ---[ end trace 240f0cab842b707a ]---
[ 11.148588] ---[ end trace 240f0cab842b707a ]---
Thanks,
Ying Huang