> > [ 3.497987] using random self ethernet address > > [ 3.503321] using random host ethernet address > > [ 3.510076] g_ether gadget: Ethernet Gadget, version: Memorial Day > 2008 > > [ 3.516749] g_ether gadget: g_ether ready > > [ 4.842006] irq 237: nobody cared (try booting with the "irqpoll" > option) > > [ 4.848855] CPU: 0 PID: 1 Comm: swapper Not tainted 3.12.0-rc6 #149 > > [ 4.855218] [<c00144c8>] (unwind_backtrace+0x0/0xf0) from > [<c0011ce4>] (show_stack+0x10/0x14) > > [ 4.863808] [<c0011ce4>] (show_stack+0x10/0x14) from [<c00513a0>] > (__report_bad_irq+0x20/0xc0) > > [ 4.872463] [<c00513a0>] (__report_bad_irq+0x20/0xc0) from > [<c0051848>] (note_interrupt+0x1d4/0x238) > > [ 4.881636] [<c0051848>] (note_interrupt+0x1d4/0x238) from > [<c004fac4>] (handle_irq_event_percpu+0xc4/0x264) > > [ 4.891500] [<c004fac4>] (handle_irq_event_percpu+0xc4/0x264) from > [<c004fca0>] (handle_irq_event+0x3c/0x5c) > > [ 4.901365] [<c004fca0>] (handle_irq_event+0x3c/0x5c) from > [<c0051fd0>] (handle_level_irq+0x8c/0xe8) > > [ 4.910535] [<c0051fd0>] (handle_level_irq+0x8c/0xe8) from > [<c004f358>] (generic_handle_irq+0x20/0x30) > > [ 4.919880] [<c004f358>] (generic_handle_irq+0x20/0x30) from > [<c000fde0>] (handle_IRQ+0x30/0x84) > > [ 4.928705] [<c000fde0>] (handle_IRQ+0x30/0x84) from [<c0012764>] > (__irq_svc+0x44/0x54) > > [ 4.936757] [<c0012764>] (__irq_svc+0x44/0x54) from [<c0020248>] > (__do_softirq+0x90/0x26c) > > [ 4.945058] [<c0020248>] (__do_softirq+0x90/0x26c) from [<c00204f0>] > (do_softirq+0x68/0x70) > > [ 4.953442] [<c00204f0>] (do_softirq+0x68/0x70) from [<c00207e4>] > (irq_exit+0xa4/0xf4) > > [ 4.961395] [<c00207e4>] (irq_exit+0xa4/0xf4) from [<c000fde4>] > (handle_IRQ+0x34/0x84) > > [ 4.969353] [<c000fde4>] (handle_IRQ+0x34/0x84) from [<c0012764>] > (__irq_svc+0x44/0x54) > > [ 4.977396] [<c0012764>] (__irq_svc+0x44/0x54) from [<c0062c44>] > (lock_acquire+0xac/0x104) > > [ 4.985715] [<c0062c44>] (lock_acquire+0xac/0x104) from [<c046f76c>] > (mutex_lock_nested+0x48/0x2d0) > > [ 4.994815] [<c046f76c>] (mutex_lock_nested+0x48/0x2d0) from > [<c02c211c>] (device_add+0x36c/0x608) > > [ 5.003831] [<c02c211c>] (device_add+0x36c/0x608) from [<c035a990>] > (mousedev_create+0x1f8/0x25c) > > [ 5.012759] [<c035a990>] (mousedev_create+0x1f8/0x25c) from > [<c067ca1c>] (mousedev_init+0x14/0x60) > > [ 5.021758] [<c067ca1c>] (mousedev_init+0x14/0x60) from [<c00088ac>] > (do_one_initcall+0xe8/0x154) > > [ 5.030672] [<c00088ac>] (do_one_initcall+0xe8/0x154) from > [<c0659ac8>] (kernel_init_freeable+0xec/0x1b4) > > [ 5.040278] [<c0659ac8>] (kernel_init_freeable+0xec/0x1b4) from > [<c0468188>] (kernel_init+0x8/0xe4) > > [ 5.049363] [<c0468188>] (kernel_init+0x8/0xe4) from [<c000efa0>] > (ret_from_fork+0x14/0x34) > > [ 5.057723] handlers: > > [ 5.060030] [<c03472b8>] ci_irq > > [ 5.063205] Disabling IRQ #237 > > IRQ 237 belongs to the usb0, the OTG capable port. > > > grep ci_hdrc /proc/interrupts > > 237: 100000 - 93 ci_hdrc_imx > > 238: 0 - 92 ci_hdrc_imx > > I can reproduce the problem on another mx28 hardware, it happens only if > a host type USB cable is plugged into the OTG port and connected to > another machine's host port. What your otg port looks like? It is a Micro-B-Female port? If ID pin is low, it will be considered as host role, when you connect to another machine's host port, both sides are host, it can't be enumerated. This leads to the ID pin is pulled to > ground and the chipidea driver comes up host mode. However the ether > gadget seems to do something on the bus, which triggers an interrupt in > the udc, but the multiplexer in the chipidea core will call the host > role, due to the ID pin. > > If the system boot without a cable or with a device type cable (attached > to another host or not doesn't matter), the ID pin stays floating, the > driver comes in peripheral role and everything works. > > Marc > > -- > Pengutronix e.K. | Marc Kleine-Budde | > Industrial Linux Solutions | Phone: +49-231-2826-924 | > Vertretung West/Dortmund | Fax: +49-5121-206917-5555 | > Amtsgericht Hildesheim, HRA 2686 | http://www.pengutronix.de | ��.n��������+%������w��{.n�����{���)�� jg��� �����ݢj����G���� ���j:+v���w�m������w�������h�����٥
