Well, that theory is easy to test if you have the device:
Just comment out these lines (that only are applicable to Mygica T230
anyhow) from the function cxusb_disconnect:
/* remove I2C client for tuner */
client = st->i2c_client_tuner;
if (client) {
module_put(client->dev.driver->owner);
i2c_unregister_device(client);
}
/* remove I2C client for demodulator */
client = st->i2c_client_demod;
if (client) {
module_put(client->dev.driver->owner);
i2c_unregister_device(client);
}
Not an expert on the internals of dvb-usb, but in what kind of
situation the state would not be available?
Cheers,
-olli
On 27 February 2016 at 18:28, Antti Palosaari <crope@xxxxxx> wrote:
> I think it is because of your device disconnects itself from the usb bus
> after the firmware download (and then reconnects with different usb id) and
> disconnect callback refers to data that does not exist at the moment (driver
> state).
>
> Olli could you take a look about it.
>
> regards
> Antti
>
>
> On 02/27/2016 01:26 PM, Tim Connors wrote:
>>
>> I've submitted bug https://bugzilla.kernel.org/show_bug.cgi?id=112861
>>
>> cxusb last worked for me in debian's 3.16.0-0.bpo.4-amd64, failed in 4.3
>> and 4.4. Oops and then panic within a second of plugging in the usb cable
>> (or at bootup). My other usb tuner is working flawlessly.
>>
>> https://bugzilla.redhat.com/show_bug.cgi?id=1175001
>> might be a similar bug, and I tried reverting the patch here (since George
>> talks about a new oops in the same timeframe):
>> https://bugzilla.redhat.com/show_bug.cgi?id=1154454
>> but with no luck.
>>
>>
>> What should I do next?
>>
>>
>> Feb 15 00:09:54 fs kernel: [11927.112039] usb 1-3.2: new high-speed USB
>> device number 9 using ehci-pci
>> Feb 15 00:09:54 fs kernel: [11927.220430] usb 1-3.2: New USB device found,
>> idVendor=0fe9, idProduct=db10
>> Feb 15 00:09:54 fs kernel: [11927.220440] usb 1-3.2: New USB device
>> strings: Mfr=0, Product=0, SerialNumber=0
>> Feb 15 00:09:54 fs laptop-mode: Warning: Configuration file
>> /etc/laptop-mode/conf.d/board-specific/*.conf is not readable, skipping.
>> Feb 15 00:09:54 fs laptop-mode: laptop-mode-tools is disabled in config
>> file. Exiting
>> Feb 15 00:09:54 fs kernel: [11927.254648] dvb-usb: found a 'DViCO
>> FusionHDTV DVB-T USB (TH7579)' in cold state, will try to load a firmware
>> Feb 15 00:09:54 fs kernel: [11927.254740] usb 1-3.2: firmware:
>> direct-loading firmware dvb-usb-bluebird-01.fw
>> Feb 15 00:09:54 fs kernel: [11927.254749] dvb-usb: downloading firmware
>> from file 'dvb-usb-bluebird-01.fw'
>> Feb 15 00:09:54 fs kernel: [11927.318141] usbcore: registered new
>> interface driver dvb_usb_cxusb
>> Feb 15 00:09:54 fs laptop-mode: Warning: Configuration file
>> /etc/laptop-mode/conf.d/board-specific/*.conf is not readable, skipping.
>> Feb 15 00:09:54 fs laptop-mode: laptop-mode-tools is disabled in config
>> file. Exiting
>> Feb 15 00:09:54 fs kernel: [11927.397296] usb 1-3.2: USB disconnect,
>> device number 9
>> Feb 15 00:09:54 fs kernel: [11927.397407] BUG: unable to handle kernel
>> paging request at 0000000000002830
>> Feb 15 00:09:54 fs kernel: [11927.397656] IP: [<ffffffffa0d350a3>]
>> cxusb_disconnect+0x13/0x70 [dvb_usb_cxusb]
>> Feb 15 00:09:54 fs kernel: [11927.397907] PGD a1537067 PUD b003f067 PMD 0
>> Feb 15 00:09:54 fs kernel: [11927.398096] Oops: 0000 [#1] SMP
>> Feb 15 00:09:54 fs kernel: [11927.398247] Modules linked in:
>> dvb_usb_cxusb(O) rc_dib0700_rc5(O) tuner_xc2028(O) dib7000p(O)
>> dvb_usb_dib0700(O) dib9000(O) dib7000m(O) dib0090(O) dib0070(O) dib3000mc(O)
>> dibx000_common(O) dvb_usb(O) dvb_core(O) rc_core(O) media(O) nfsv4
>> dns_resolver nf_conntrack_netlink nf_conntrack xt_multiport iptable_filter
>> ip_tables x_tables nfnetlink_log nfnetlink fuse cpufreq_powersave
>> cpufreq_userspace cpufreq_conservative bnep rfcomm bluetooth rfkill autofs4
>> uinput rpcsec_gss_krb5 nfsd auth_rpcgss oid_registry nfs_acl nfs lockd grace
>> fscache sunrpc raid1 cpufreq_stats loop md_mod coretemp pcspkr serio_raw
>> evdev i2c_i801 pl2303 usbserial zfs(PO) zunicode(PO) zcommon(PO) znvpair(PO)
>> snd_usb_audio snd_usbmidi_lib snd_rawmidi snd_seq_device spl(O) zavl(PO)
>> amdkfd radeon snd_hda_intel ttm drm_kms_helper snd_hda_codec ich7_gpio(O)
>> snd_hda_core snd_hwdep snd_pcm_oss drm snd_mixer_oss i2c_algo_bit snd_pcm
>> snd_timer snd soundcore shpchp 8250_fintek button acpi!
>
> _c!
>>
>> pufreq tpm_tis tpm processor ext4
>> Feb 15 00:09:54 fs kernel: crc16 mbcache jbd2 dm_mod it87 hwmon_vid
>> ata_generic hid_generic usbhid hid uas usb_storage sg sd_mod ahci
>> pata_jmicron libahci libata e1000e scsi_mod uhci_hcd ehci_pci ehci_hcd ptp
>> pps_core usbcore usb_common thermal fan [last unloaded: dib0090]
>> Feb 15 00:09:54 fs kernel: [11927.401277] CPU: 0 PID: 8965 Comm:
>> kworker/0:0 Tainted: P O 4.4.0-trunk-amd64 #1 Debian 4.4-1~exp1
>> Feb 15 00:09:54 fs kernel: [11927.401277] Hardware name: OEM
>> OEM/Pineview-ICH9, BIOS 6.00 PG 11/17/2010
>> Feb 15 00:09:54 fs kernel: [11927.401277] Workqueue: usb_hub_wq hub_event
>> [usbcore]
>> Feb 15 00:09:54 fs kernel: [11927.401277] task: ffff880036172740 ti:
>> ffff8801112f8000 task.ti: ffff8801112f8000
>> Feb 15 00:09:54 fs kernel: [11927.401277] RIP: 0010:[<ffffffffa0d350a3>]
>> [<ffffffffa0d350a3>] cxusb_disconnect+0x13/0x70 [dvb_usb_cxusb]
>> Feb 15 00:09:54 fs kernel: [11927.401277] RSP: 0018:ffff8801112fbbd8
>> EFLAGS: 00010246
>> Feb 15 00:09:54 fs kernel: [11927.401277] RAX: 0000000000000000 RBX:
>> ffff88007f057030 RCX: 0000000000000000
>> Feb 15 00:09:54 fs kernel: [11927.401277] RDX: 0000000000000000 RSI:
>> ffff88007f057000 RDI: ffff88007f057000
>> Feb 15 00:09:54 fs kernel: [11927.401277] RBP: ffff88007f057000 R08:
>> 0000000000000000 R09: 0000000000000000
>> Feb 15 00:09:54 fs kernel: [11927.401277] R10: 000000000000001a R11:
>> 0000000000000070 R12: ffffffffa0051380
>> Feb 15 00:09:54 fs kernel: [11927.401277] R13: ffffffffa0d390a8 R14:
>> ffff8800b90a8090 R15: ffff8800b90a8000
>> Feb 15 00:09:54 fs kernel: [11927.401277] FS: 0000000000000000(0000)
>> GS:ffff88013fc00000(0000) knlGS:0000000000000000
>> Feb 15 00:09:54 fs kernel: [11927.401277] CS: 0010 DS: 0000 ES: 0000 CR0:
>> 000000008005003b
>> Feb 15 00:09:54 fs kernel: [11927.401277] CR2: 0000000000002830 CR3:
>> 00000000b001b000 CR4: 00000000000006f0
>> Feb 15 00:09:54 fs kernel: [11927.401277] Stack:
>> Feb 15 00:09:54 fs kernel: [11927.401277] ffff88007f057030
>> ffff88007f057000 ffffffffa0051380 ffffffffa003c429
>> Feb 15 00:09:54 fs kernel: [11927.401277] ffff8800b90a8000
>> 0000000000000000 ffff8800b90a8090 ffff88007f0570e0
>> Feb 15 00:09:54 fs kernel: [11927.401277] ffff88007f057030
>> ffffffffa0d390a8 ffffffffa0051380 ffff88007f057040
>> Feb 15 00:09:54 fs kernel: [11927.401277] Call Trace:
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffffa003c429>] ?
>> usb_unbind_interface+0x79/0x250 [usbcore]
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff81408fea>] ?
>> __device_release_driver+0x9a/0x140
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff814090ae>] ?
>> device_release_driver+0x1e/0x30
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff81408739>] ?
>> bus_remove_device+0xf9/0x170
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff81404bb7>] ?
>> device_del+0x127/0x250
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff814057fc>] ?
>> _dev_info+0x6c/0x90
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffffa0039dce>] ?
>> usb_disable_device+0x7e/0x260 [usbcore]
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffffa002fc30>] ?
>> usb_disconnect+0x90/0x280 [usbcore]
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffffa002bc24>] ?
>> set_port_feature+0x44/0x50 [usbcore]
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffffa0031e5d>] ?
>> hub_event+0x75d/0x14e0 [usbcore]
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff8108d79f>] ?
>> process_one_work+0x19f/0x3d0
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff8108da1d>] ?
>> worker_thread+0x4d/0x450
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff8108d9d0>] ?
>> process_one_work+0x3d0/0x3d0
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff810937ad>] ?
>> kthread+0xcd/0xf0
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff810936e0>] ?
>> kthread_create_on_node+0x190/0x190
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff81583dcf>] ?
>> ret_from_fork+0x3f/0x70
>> Feb 15 00:09:54 fs kernel: [11927.401277] [<ffffffff810936e0>] ?
>> kthread_create_on_node+0x190/0x190
>> Feb 15 00:09:54 fs kernel: [11927.401277] Code: c7 02 00 00 00 00 31 c0 c3
>> 0f 1f 44 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 41 54 55 48 89
>> fd 53 48 8b 87 d0 00 00 00 <4c> 8b a0 30 28 00 00 49 8b 5c 24 10 48 85 db 74
>> 18 48 8b 83 b0
>> Feb 15 00:09:54 fs kernel: [11927.401277] RIP [<ffffffffa0d350a3>]
>> cxusb_disconnect+0x13/0x70 [dvb_usb_cxusb]
>> Feb 15 00:09:54 fs kernel: [11927.401277] RSP <ffff8801112fbbd8>
>> Feb 15 00:09:54 fs kernel: [11927.401277] CR2: 0000000000002830
>> Feb 15 00:09:54 fs kernel: [11927.401277] ---[ end trace d6393009544ed355
>> ]---
>> Feb 15 00:09:54 fs kernel: [11927.527370] BUG: unable to handle kernel
>> paging request at ffffffffffffffd8
>>
>
> --
> http://palosaari.fi/
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