> Can you try the code below? It should force dropping and adding the endpoints > for the intrface(s) of that configuration, and xhci should reset the toggles. > > Completely untested, it compiles :) Sorry, no, that doesn't work: xhci_hcd 0000:00:14.0: Trying to add endpoint 0x83 without dropping it. BUG: kernel NULL pointer dereference, address: 0000000000000010 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 6 PID: 1192 Comm: python Tainted: P OE 5.8.3-arch1-1-custom #2 Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Z77-DS3H, BIOS F11a 11/13/2013 RIP: 0010:usb_altnum_to_altsetting+0x5/0x40 Code: 00 eb 09 48 83 c0 08 48 39 c8 74 12 4c 8b 00 49 8b 10 0f b6 52 02 39 f2 75 e9 4c 89 c0 c3 45 31 c0 4c 89 c0 c3 0f 1f 44 00 00 <8b> 4f 10 85 c9 74 26 48 8b 3f 31 c0 eb 07 83 c0 01 39 c8 74 18 48 RSP: 0018:ffffa0a0c0733e00 EFLAGS: 00010246 RAX: ffff97086414a000 RBX: ffff97086414a110 RCX: 0000000000000000 RDX: 0000000000000020 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff97086e0ed000 R08: 0000000000000001 R09: ffffffffc0360290 R10: 0000000000000000 R11: 0000000000000001 R12: ffff97088c95c000 R13: ffff97086414a090 R14: 00000000ffffffea R15: 0000000000000000 FS: 00007ff728371740(0000) GS:ffff97088ed80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 00000003d9666001 CR4: 00000000001606e0 Call Trace: usb_reset_configuration+0x1da/0x240 usbdev_ioctl+0x1276/0x1300 ? do_sys_openat2+0xa6/0x170 ? kmem_cache_free+0xa4/0x1d0 ksys_ioctl+0x82/0xc0 __x64_sys_ioctl+0x16/0x20 do_syscall_64+0x44/0x70 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7ff72896ef6b Code: 89 d8 49 8d 3c 1c 48 f7 d8 49 39 c4 72 b5 e8 1c ff ff ff 85 c0 78 ba 4c 89 e0 5b 5d 41 5c c3 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d d5 ae 0c 00 f7 d8 64 89 01 48 RSP: 002b:00007fff7efdce08 EFLAGS: 00000202 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000055bf1081bab0 RCX: 00007ff72896ef6b RDX: 00007fff7efdce1c RSI: 0000000080045505 RDI: 0000000000000009 RBP: 000055bf10827040 R08: 00007fff7efdcd40 R09: 00007ff727e96470 R10: 00007fff7efdcd40 R11: 0000000000000202 R12: 0000000000000000 R13: 00007fff7efdcef0 R14: 00007fff7efdcf60 R15: 00007fff7efdceec Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace sunrpc fscache fuse ip6table_filter ip6_tables xt_nat iptable_nat nf_nat nf_log_ipv4 nf_log_common xt_set xt_multiport xt_state xt_conntrac> snd_hda_codec ghash_clmulni_intel aesni_intel snd_hda_core crypto_simd uas cryptd snd_hwdep iTCO_wdt glue_helper mei_hdcp intel_pmc_bxt rapl usb_storage at24 drm_kms_helper iTCO_vendor_support snd_pcm intel_cstate cec in> CR2: 0000000000000010 ---[ end trace 86a221d52d129373 ]--- RIP: 0010:usb_altnum_to_altsetting+0x5/0x40 Code: 00 eb 09 48 83 c0 08 48 39 c8 74 12 4c 8b 00 49 8b 10 0f b6 52 02 39 f2 75 e9 4c 89 c0 c3 45 31 c0 4c 89 c0 c3 0f 1f 44 00 00 <8b> 4f 10 85 c9 74 26 48 8b 3f 31 c0 eb 07 83 c0 01 39 c8 74 18 48 RSP: 0018:ffffa0a0c0733e00 EFLAGS: 00010246 RAX: ffff97086414a000 RBX: ffff97086414a110 RCX: 0000000000000000 RDX: 0000000000000020 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff97086e0ed000 R08: 0000000000000001 R09: ffffffffc0360290 R10: 0000000000000000 R11: 0000000000000001 R12: ffff97088c95c000 R13: ffff97086414a090 R14: 00000000ffffffea R15: 0000000000000000 FS: 00007ff728371740(0000) GS:ffff97088ed80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000010 CR3: 00000003d9666001 CR4: 00000000001606e0
