Description of problem:

Plugging the USB TV stick: PCTV 340e triggers a kernel trace and does not work (it used to work before, see https://bugs.mageia.org/show_bug.cgi?id=6650).


Here the logs:



74110.904853] usb 1-5: SerialNumber: 0900FB427A
[74111.986588] dvb-usb: found a 'Pinnacle PCTV 340e HD Pro USB Stick' in cold state, will try to load a firmware
[74111.992895] dvb-usb: downloading firmware from file 'dvb-usb-dib0700-1.20.fw'
[74112.195823] dib0700: firmware started successfully.
[74112.696216] dvb-usb: found a 'Pinnacle PCTV 340e HD Pro USB Stick' in warm state.
[74112.696298] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[74112.696460] DVB: registering new adapter (Pinnacle PCTV 340e HD Pro USB Stick)
[74113.490573] usb 1-5: DVB: registering adapter 0 frontend 0 (DiBcom 7000PC)...
[74113.505389] xc4000 6-0061: creating new instance
[74113.510567] xc4000: Successfully identified at address 0x61
[74113.510569] xc4000: Firmware has not been loaded previously
[74113.548037] Registered IR keymap rc-dib0700-rc5
[74113.548220] input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1d.7/usb1/1-5/rc/rc0/input15
[74113.548320] rc0: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1d.7/usb1/1-5/rc/rc0
[74113.548444] dvb-usb: schedule remote query interval to 50 msecs.
[74113.548447] dvb-usb: Pinnacle PCTV 340e HD Pro USB Stick successfully initialized and connected.
[74113.548592] usbcore: registered new interface driver dvb_usb_dib0700
[74132.424938] gspca_sn9c20x: Set 640x480
[74141.936240] Incorrect readback of firmware version 1.4.
[74146.111086] Incorrect readback of firmware version 1.4.
[74151.744045] Incorrect readback of firmware version 1.4.
[74155.922141] Incorrect readback of firmware version 1.4.
[74161.536102] Incorrect readback of firmware version 1.4.
[74165.716072] Incorrect readback of firmware version 1.4.
[74171.331156] Incorrect readback of firmware version 1.4.
[74175.506129] Incorrect readback of firmware version 1.4.
[74188.303166] Incorrect readback of firmware version 1.4.
[74192.482014] Incorrect readback of firmware version 1.4.
[74198.257091] Incorrect readback of firmware version 1.4.
[74202.441309] Incorrect readback of firmware version 1.4.
[74207.634042] Incorrect readback of firmware version 1.4.
[74211.812118] Incorrect readback of firmware version 1.4.
[74217.543079] Incorrect readback of firmware version 1.4.
[74221.717048] Incorrect readback of firmware version 1.4.
[74226.904013] Incorrect readback of firmware version 1.4.
[74231.080234] Incorrect readback of firmware version 1.4.
[74235.023632] usb 1-5: USB disconnect, device number 6
[74235.152018] xc4000: I2C write failed (len=4)
[74235.152023] bytes 00 05 00 00
[74235.152026] failed to put device into direct mode!
[74235.152029] xc4000: I2C read failed
[74235.152031] xc4000: I2C read failed
[74235.152033] Unable to read tuner registers.
[74235.350015] xc4000: I2C write failed (len=4)
[74235.350020] bytes 00 05 00 00
[74235.350023] failed to put device into direct mode!
[74235.350026] xc4000: I2C read failed
[74235.350028] xc4000: I2C read failed
[74235.350030] Unable to read tuner registers.
[74235.350058] divide error: 0000 [#1] SMP 
[74235.350063] Modules linked in: rc_dib0700_rc5 xc4000 dvb_usb_dib0700 dib8000 dib7000m dib0090 dib0070 dib7000p dib3000mc dibx000_common dvb_usb dvb_core rc_core iptable_filter ip_tables x_tables dm_zero loop fuse xfs xts gf128mul dm_crypt af_packet lm63 nvidia(PO) gspca_sn9c20x gspca_main dm_mirror dm_region_hash dm_log dm_mod videodev media drm iTCO_wdt iTCO_vendor_support coretemp ppdev kvm snd_hda_codec_analog snd_hda_codec_generic microcode snd_hda_codec_hdmi i2c_i801 serio_raw i2c_core lpc_ich r8169 rng_core snd_cmipci snd_opl3_lib snd_hda_intel snd_hda_controller mii snd_hda_codec snd_mpu401_uart snd_rawmidi snd_hwdep snd_seq_dummy parport_pc parport shpchp snd_seq_oss snd_seq_midi_event snd_seq snd_seq_device snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd asus_atk0110 soundcore ns558 gameport
[74235.350126]  floppy firewire_sbp2 firewire_core crc_itu_t cpufreq_ondemand cpufreq_conservative cpufreq_powersave acpi_cpufreq processor evdev ipv6 autofs4 hid_generic usbhid hid uas usb_storage uhci_hcd ehci_pci ehci_hcd sr_mod ata_generic pata_acpi usbcore usb_common button ide_generic piix ide_pci_generic ide_core ata_piix
[74235.350155] CPU: 0 PID: 18714 Comm: kdvb-ad-0-fe-0 Tainted: P           O  3.15.2-desktop-2.mga5 #1
[74235.350158] Hardware name: stem manufacturer System Product Name/P5LD2-SE, BIOS 1003    04/12/2007
[74235.350161] task: ffff880051419810 ti: ffff88003c0b0000 task.ti: ffff88003c0b0000
[74235.350164] RIP: 0010:[<ffffffffa101cc81>]  [<ffffffffa101cc81>] dib7000p_set_frontend+0x911/0x10d0 [dib7000p]
[74235.350173] RSP: 0018:ffff88003c0b39c8  EFLAGS: 00010246
[74235.350176] RAX: 0000000004000000 RBX: ffff88003c608000 RCX: 0000000010624dd3
[74235.350178] RDX: 0000000000000000 RSI: ffff8800d7a17000 RDI: ffff88003c6099a0
[74235.350181] RBP: ffff88003c0b3a20 R08: 0000000000000000 R09: ffffea00028ecb80
[74235.350184] R10: ffffffffa0057e84 R11: 000000000000037a R12: ffff88003c608000
[74235.350186] R13: 0000000000000002 R14: 00000000fffff736 R15: ffff88003c608000
[74235.350190] FS:  0000000000000000(0000) GS:ffff8800d7a00000(0000) knlGS:0000000000000000
[74235.350193] CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[74235.350195] CR2: 00007f28d4ac565c CR3: 00000000cfa9a000 CR4: 00000000000007f0
[74235.350197] Stack:
[74235.350199]  ffffea00033d8780 ffff88003c0b3a68 ffffffff81187b66 ffffffff25722300
[74235.350204]  000008ca00000001 0b47b9d000000001 ffff88005deb8400 ffff88003c608330
[74235.350208]  0000000000000002 000000000b6a0ee0 ffff88003c608000 ffff88003c0b3c40
[74235.350213] Call Trace:
[74235.350220]  [<ffffffff81187b66>] ? __slab_free+0xa6/0x320
[74235.350231]  [<ffffffffa0ff1e53>] dvb_frontend_swzigzag_autotune+0x103/0x360 [dvb_core]
[74235.350240]  [<ffffffffa0ff2ad2>] dvb_frontend_swzigzag+0x322/0x390 [dvb_core]
[74235.350246]  [<ffffffff8109d6a0>] ? dequeue_entity+0x140/0x680
[74235.350251]  [<ffffffff8101af4e>] ? native_sched_clock+0x2e/0xa0
[74235.350255]  [<ffffffff8109ede1>] ? put_prev_entity+0x31/0x440
[74235.350259]  [<ffffffff810999e8>] ? sched_clock_cpu+0x88/0xb0
[74235.350264]  [<ffffffff81011609>] ? __switch_to+0x169/0x500
[74235.350269]  [<ffffffff81070b4b>] ? lock_timer_base.isra.35+0x2b/0x50
[74235.350273]  [<ffffffff81071c6f>] ? try_to_del_timer_sync+0x4f/0x70
[74235.350277]  [<ffffffff81071cda>] ? del_timer_sync+0x4a/0x60
[74235.350283]  [<ffffffff8163f039>] ? schedule_timeout+0x159/0x270
[74235.350287]  [<ffffffff81070910>] ? ftrace_raw_event_tick_stop+0xd0/0xd0
[74235.350295]  [<ffffffffa0ff3719>] dvb_frontend_thread+0x539/0x740 [dvb_core]
[74235.350299]  [<ffffffff810a8220>] ? prepare_to_wait_event+0x100/0x100
[74235.350307]  [<ffffffffa0ff31e0>] ? dvb_frontend_should_wakeup.isra.2+0x80/0x80 [dvb_core]
[74235.350312]  [<ffffffff810870db>] kthread+0xdb/0x100
[74235.350316]  [<ffffffff81087000>] ? kthread_create_on_node+0x180/0x180
[74235.350321]  [<ffffffff8164c98c>] ret_from_fork+0x7c/0xb0
[74235.350325]  [<ffffffff81087000>] ? kthread_create_on_node+0x180/0x180
[74235.350327] Code: 45 c8 f7 d8 89 45 c4 89 f0 c1 f8 1f 41 89 c1 41 31 f1 41 29 c1 48 89 df 44 89 4d cc e8 e9 c5 ff ff 31 d2 41 89 c0 b8 00 00 00 04 <41> f7 f0 44 8b 4d cc 41 89 c2 48 8b 83 28 05 00 00 44 8b 68 14 
[74235.350370] RIP  [<ffffffffa101cc81>] dib7000p_set_frontend+0x911/0x10d0 [dib7000p]
[74235.350376]  RSP <ffff88003c0b39c8>


Reproducible: 

Steps to Reproduce: