mirror of https://gitee.com/openkylin/linux.git
30bf90ccde
Found using DEBUG_ATOMIC_SLEEP while submitting an AIO read operation: [ 100.853642] BUG: sleeping function called from invalid context at mm/slab.h:421 [ 100.861148] in_atomic(): 1, irqs_disabled(): 1, pid: 1880, name: python [ 100.867954] 2 locks held by python/1880: [ 100.867961] #0: (&epfile->mutex){....}, at: [<f8188627>] ffs_mutex_lock+0x27/0x30 [usb_f_fs] [ 100.868020] #1: (&(&ffs->eps_lock)->rlock){....}, at: [<f818ad4b>] ffs_epfile_io.isra.17+0x24b/0x590 [usb_f_fs] [ 100.868076] CPU: 1 PID: 1880 Comm: python Not tainted 4.14.0-edison+ #118 [ 100.868085] Hardware name: Intel Corporation Merrifield/BODEGA BAY, BIOS 542 2015.01.21:18.19.48 [ 100.868093] Call Trace: [ 100.868122] dump_stack+0x47/0x62 [ 100.868156] ___might_sleep+0xfd/0x110 [ 100.868182] __might_sleep+0x68/0x70 [ 100.868217] kmem_cache_alloc_trace+0x4b/0x200 [ 100.868248] ? dwc3_gadget_ep_alloc_request+0x24/0xe0 [dwc3] [ 100.868302] dwc3_gadget_ep_alloc_request+0x24/0xe0 [dwc3] [ 100.868343] usb_ep_alloc_request+0x16/0xc0 [udc_core] [ 100.868386] ffs_epfile_io.isra.17+0x444/0x590 [usb_f_fs] [ 100.868424] ? _raw_spin_unlock_irqrestore+0x27/0x40 [ 100.868457] ? kiocb_set_cancel_fn+0x57/0x60 [ 100.868477] ? ffs_ep0_poll+0xc0/0xc0 [usb_f_fs] [ 100.868512] ffs_epfile_read_iter+0xfe/0x157 [usb_f_fs] [ 100.868551] ? security_file_permission+0x9c/0xd0 [ 100.868587] ? rw_verify_area+0xac/0x120 [ 100.868633] aio_read+0x9d/0x100 [ 100.868692] ? __fget+0xa2/0xd0 [ 100.868727] ? __might_sleep+0x68/0x70 [ 100.868763] SyS_io_submit+0x471/0x680 [ 100.868878] do_int80_syscall_32+0x4e/0xd0 [ 100.868921] entry_INT80_32+0x2a/0x2a [ 100.868932] EIP: 0xb7fbb676 [ 100.868941] EFLAGS: 00000292 CPU: 1 [ 100.868951] EAX: ffffffda EBX: b7aa2000 ECX: 00000002 EDX: b7af8368 [ 100.868961] ESI: b7fbb660 EDI: b7aab000 EBP: bfb6c658 ESP: bfb6c638 [ 100.868973] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com> |
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| .. | ||
| Makefile | ||
| f_acm.c | ||
| f_ecm.c | ||
| f_eem.c | ||
| f_fs.c | ||
| f_hid.c | ||
| f_loopback.c | ||
| f_mass_storage.c | ||
| f_mass_storage.h | ||
| f_midi.c | ||
| f_ncm.c | ||
| f_obex.c | ||
| f_phonet.c | ||
| f_printer.c | ||
| f_rndis.c | ||
| f_serial.c | ||
| f_sourcesink.c | ||
| f_subset.c | ||
| f_tcm.c | ||
| f_uac1.c | ||
| f_uac1_legacy.c | ||
| f_uac2.c | ||
| f_uvc.c | ||
| f_uvc.h | ||
| g_zero.h | ||
| ndis.h | ||
| rndis.c | ||
| rndis.h | ||
| storage_common.c | ||
| storage_common.h | ||
| tcm.h | ||
| u_audio.c | ||
| u_audio.h | ||
| u_ecm.h | ||
| u_eem.h | ||
| u_ether.c | ||
| u_ether.h | ||
| u_ether_configfs.h | ||
| u_fs.h | ||
| u_gether.h | ||
| u_hid.h | ||
| u_midi.h | ||
| u_ncm.h | ||
| u_phonet.h | ||
| u_printer.h | ||
| u_rndis.h | ||
| u_serial.c | ||
| u_serial.h | ||
| u_tcm.h | ||
| u_uac1.h | ||
| u_uac1_legacy.c | ||
| u_uac1_legacy.h | ||
| u_uac2.h | ||
| u_uvc.h | ||
| uvc.h | ||
| uvc_configfs.c | ||
| uvc_configfs.h | ||
| uvc_queue.c | ||
| uvc_queue.h | ||
| uvc_v4l2.c | ||
| uvc_v4l2.h | ||
| uvc_video.c | ||
| uvc_video.h | ||