em28xx driver issue kernel 5.7.0

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Good morning,


I hope that this is the right place to report a bug for the em28xx driver as I did not have success on the kernel bug tracker.

Since I started using the 5.7.0 rcs I am getting following call trace with a Hauppauge WinTV-soloHD using the em28xx driver. Other tuners work as expected.


Dmesg output:

[    4.576429] ------------[ cut here ]------------
[    4.576438] WARNING: CPU: 4 PID: 891 at drivers/media/mc/mc-entity.c:669 media_create_pad_link+0x1cd/0x200 [mc]
[    4.576439] Modules linked in: si2157 si2168 i2c_mux em28xx_dvb(+) dvb_core cmac algif_hash algif_skcipher af_alg bnep btusb btrtl btbcm btintel bluetooth snd_usb_audio uvcvideo videobuf2_vmalloc videobuf2_memops snd_usbmidi_lib videobuf2_v4l2 snd_rawmidi videobuf2_common ecdh_generic snd_seq_device ecc em28xx tveeprom videodev mousedev input_leds joydev mc rfkill lm92 it87 hwmon_vid hid_generic usbhid hid edac_mce_amd amdgpu kvm_amd kvm nls_iso8859_1 nls_cp437 vfat snd_hda_codec_realtek fat snd_hda_codec_generic irqbypass ledtrig_audio snd_hda_codec_hdmi snd_hda_intel snd_intel_dspcfg gpu_sched snd_hda_codec ttm crct10dif_pclmul crc32_pclmul snd_hda_core ghash_clmulni_intel wmi_bmof mxm_wmi drm_kms_helper snd_hwdep snd_pcm igb cec aesni_intel rc_core snd_timer ccp snd sp5100_tco crypto_simd syscopyarea sysfillrect cryptd i2c_algo_bit sysimgblt pcspkr k10temp i2c_piix4 glue_helper dca fb_sys_fops soundcore rng_core wmi evdev pinctrl_amd mac_hid acpi_cpufreq vboxnetflt(OE) vboxnetadp(OE)
[    4.576486]  drm vboxdrv(OE) crypto_user agpgart ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 crc32c_intel xhci_pci xhci_hcd
[    4.576496] CPU: 4 PID: 891 Comm: modprobe Tainted: G           OE     5.7.0-rc7-1-mainline #1
[    4.576497] Hardware name: Gigabyte Technology Co., Ltd. X570 AORUS PRO/X570 AORUS PRO, BIOS F12e 03/06/2020
[    4.576502] RIP: 0010:media_create_pad_link+0x1cd/0x200 [mc]
[    4.576505] Code: 5f c3 0f 0b 48 83 c4 10 b8 ea ff ff ff 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 0b b8 ea ff ff ff eb d2 0f 0b b8 ea ff ff ff eb c9 <0f> 0b b8 ea ff ff ff eb c0 0f 0b b8 ea ff ff ff eb b7 b8 f4 ff ff
[    4.576507] RSP: 0018:ffffa670411d3af8 EFLAGS: 00010246
[    4.576509] RAX: 0000000000000000 RBX: ffffa0f9a7d75400 RCX: 0000000000000000
[    4.576510] RDX: ffffa0f9a97cd310 RSI: 0000000000000000 RDI: ffffa0f9a97cd290
[    4.576512] RBP: ffffa0f9a97cd290 R08: 0000000000000001 R09: 0000000000000000
[    4.576513] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
[    4.576514] R13: ffffa0f9c13b0cc8 R14: ffffa0f9cbca1038 R15: 0000000000000000
[    4.576516] FS:  00007f6781ea2740(0000) GS:ffffa0f9ceb00000(0000) knlGS:0000000000000000
[    4.576517] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[    4.576518] CR2: 00007f5db8b8ccb0 CR3: 00000003df630000 CR4: 0000000000340ee0
[    4.576520] Call Trace:
[    4.576533]  dvb_create_media_graph+0x48a/0x590 [dvb_core]
[    4.576540]  em28xx_dvb_init.cold+0x1028/0x25e4 [em28xx_dvb]
[    4.576550]  em28xx_register_extension+0x5a/0xb0 [em28xx]
[    4.576554]  ? 0xffffffffc03dd000
[    4.576558]  do_one_initcall+0x59/0x240
[    4.576564]  do_init_module+0x5c/0x260
[    4.576567]  load_module+0x2137/0x23a0
[    4.576574]  __do_sys_init_module+0x172/0x1a0
[    4.576580]  do_syscall_64+0x49/0x90
[    4.576584]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    4.576586] RIP: 0033:0x7f6781fcf73e
[    4.576589] Code: 48 8b 0d 55 f7 0b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 49 89 ca b8 af 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 22 f7 0b 00 f7 d8 64 89 01 48
[    4.576591] RSP: 002b:00007ffcbe457b48 EFLAGS: 00000246 ORIG_RAX: 00000000000000af
[    4.576593] RAX: ffffffffffffffda RBX: 000056363963fff0 RCX: 00007f6781fcf73e
[    4.576594] RDX: 00005636389fd368 RSI: 000000000000e158 RDI: 0000563639e4e4e0
[    4.576595] RBP: 0000563639e4e4e0 R08: 0000000000000000 R09: 00007ffcbe455b48
[    4.576596] R10: 0000000000000001 R11: 0000000000000246 R12: 00005636389fd368
[    4.576598] R13: 0000000000000000 R14: 0000563639640070 R15: 000056363963fff0
[    4.576601] ---[ end trace 12d333b621a2a68c ]---


Thanks

Johan Breuninger







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