Help to understand the kernel failure when connecting the tuner.
Code
[ 34.282523@2] usb 1-2: new high-speed USB device number 2 using xhci-hcd
[ 34.422594@2] usb 1-2: New USB device found, idVendor=734c, idProduct=5521
[ 34.422607@2] usb 1-2: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[ 34.443628@3] media: Linux media interface: v0.10
[ 34.449909@3] WARNING: You are using an experimental version of the media stack.
[ 34.449909@3] As the driver is backported to an older kernel, it doesn't offer
[ 34.449909@3] enough quality for its usage in production.
[ 34.449909@3] Use it with care.
[ 34.449909@3] Latest git patches (needed if you report a bug to linux-media@vger.kernel.org):
[ 34.449909@3]
[ 34.455481@3] WARNING: You are using an experimental version of the media stack.
[ 34.455481@3] As the driver is backported to an older kernel, it doesn't offer
[ 34.455481@3] enough quality for its usage in production.
[ 34.455481@3] Use it with care.
[ 34.455481@3] Latest git patches (needed if you report a bug to linux-media@vger.kernel.org):
[ 34.455481@3]
[ 34.463765@3] dvb-usb: found a 'TBS 5520se USB2.0' in cold state, will try to load a firmware
[ 34.465779@3] dvb-usb: downloading firmware from file 'dvb-usb-tbsqbox-id5521.fw'
[ 34.465784@3] tbs5520se: start downloading TBS5520se firmware
[ 34.472065@3] usb 1-2: USB disconnect, device number 2
[ 34.572369@2] dvb-usb: found a 'TBS 5520se USB2.0' in warm state.
[ 34.573702@3] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[ 34.573818@3] dvbdev: DVB: registering new adapter (TBS 5520se USB2.0)
[ 34.573845@3] usb 1-2: media controller created
[ 34.573854@3] tbs5520se: read eeprom failed.
[ 34.573858@3] dvb-usb: MAC address reading failed.
[ 34.575154@3] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 34.593743@3] i2c i2c-1: Added multiplexed i2c bus 2
[ 34.593749@3] si2183 1-0067: Silicon Labs Si2183 successfully attached
[ 34.601839@3] si2157 2-0061: Silicon Labs Si2147/2148/2157/2158 successfully attached
[ 34.611210@3] i2c i2c-2: av201x: Airoha Technology AV201x successfully attached
[ 34.611228@3] usb 1-2: DVB: registering adapter 0 frontend 0 (TBS 5520se USB2.0)...
[ 34.611253@3] dvbdev: dvb_create_media_entity: media entity 'TBS 5520se USB2.0' registered.
[ 34.611843@3] usb 1-2: DVB: registering adapter 0 frontend 1 (Silicon Labs Si2183)...
[ 34.611861@3] dvbdev: dvb_create_media_entity: media entity 'Silicon Labs Si2183' registered.
[ 34.615440@3] dvb-usb: TBS 5520se USB2.0 successfully initialized and connected.
[ 34.616975@3] usbcore: registered new interface driver tbs5520se
[ 34.628599@0] dvb-usb: TBS 5520se USB2.0 successfully deinitialized and disconnected.
[ 36.262366@2] usb 1-2: new high-speed USB device number 3 using xhci-hcd
[ 36.402658@2] usb 1-2: New USB device found, idVendor=734c, idProduct=5521
[ 36.402663@2] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[ 36.402666@2] usb 1-2: Product: TBS 5521
[ 36.402669@2] usb 1-2: Manufacturer: TBS-Tech
[ 36.405542@3] dvb-usb: found a 'TBS 5520se USB2.0' in cold state, will try to load a firmware
[ 36.405564@3] dvb-usb: downloading firmware from file 'dvb-usb-tbsqbox-id5521.fw'
[ 36.405568@3] tbs5520se: start downloading TBS5520se firmware
[ 36.512341@2] dvb-usb: found a 'TBS 5520se USB2.0' in warm state.
[ 36.512898@2] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[ 36.513008@2] dvbdev: DVB: registering new adapter (TBS 5520se USB2.0)
[ 36.513021@2] usb 1-2: media controller created
[ 36.594002@2] dvb-usb: MAC address: 00:44:ab:c0:26:d2
[ 36.594943@2] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[ 36.600709@2] i2c i2c-1: Added multiplexed i2c bus 2
[ 36.600716@2] si2183 1-0067: Silicon Labs Si2183 successfully attached
[ 36.606201@2] si2157 2-0061: Silicon Labs Si2147/2148/2157/2158 successfully attached
[ 36.606275@2] i2c i2c-2: av201x: Airoha Technology AV201x successfully attached
[ 36.666605@2] usb 1-2: DVB: registering adapter 0 frontend 0 (TBS 5520se USB2.0)...
[ 36.666626@2] dvbdev: dvb_create_media_entity: media entity 'TBS 5520se USB2.0' registered.
[ 36.666907@0] usb 1-2: DVB: registering adapter 0 frontend 1 (Silicon Labs Si2183)...
[ 36.666922@0] dvbdev: dvb_create_media_entity: media entity 'Silicon Labs Si2183' registered.
[ 36.667176@0] ------------[ cut here ]------------
[ 36.667192@0] WARNING: CPU: 0 PID: 1183 at fs/sysfs/dir.c:52 sysfs_warn_dup+0x8c/0xb0()
[ 36.667193@0] sysfs: cannot create duplicate filename '/class/dvb/dvb0.frontend1'
[ 36.667219@0] Modules linked in: av201x(O) si2157(O) si2183(O) dvb_usb_tbs5520se(O) dvb_usb(O) dvb_core(O) rc_core(O) media(O) 8189es 8021q cfg80211 wifi_dummy mali(O) aml_nftl_dev(P) fbcon bitblit softcursor font
[ 36.667224@0] CPU: 0 PID: 1183 Comm: khubd Tainted: P O 3.14.29 #1
[ 36.667226@0] Call trace:
[ 36.667233@0] [<ffffffc001087e08>] dump_backtrace+0x0/0x128
[ 36.667236@0] [<ffffffc001087f50>] show_stack+0x20/0x30
[ 36.667242@0] [<ffffffc0017e0d54>] dump_stack+0x78/0x94
[ 36.667249@0] [<ffffffc001095714>] warn_slowpath_common+0x94/0xc0
[ 36.667252@0] [<ffffffc0010957a0>] warn_slowpath_fmt+0x60/0x78
[ 36.667257@0] [<ffffffc0011fa1a8>] sysfs_warn_dup+0x88/0xb0
[ 36.667260@0] [<ffffffc0011fa68c>] sysfs_do_create_link_sd.isra.0+0xec/0x100
[ 36.667262@0] [<ffffffc0011fa6dc>] sysfs_create_link+0x3c/0x68
[ 36.667267@0] [<ffffffc0013e93a0>] device_add+0x420/0x520
[ 36.667270@0] [<ffffffc0013e9724>] device_create_groups_vargs+0x124/0x138
[ 36.667274@0] [<ffffffc0013e9834>] device_create+0x84/0xa0
[ 36.667284@0] [<ffffffbffc25ca7c>] dvb_register_device+0x224/0x638 [dvb_core]
[ 36.667291@0] [<ffffffbffc2652cc>] dvb_register_frontend+0x194/0x1f0 [dvb_core]
[ 36.667296@0] [<ffffffbffc27cd70>] dvb_usb_adapter_frontend_init+0xb0/0x228 [dvb_usb]
[ 36.667300@0] [<ffffffbffc27bb40>] dvb_usb_device_init+0x4a0/0x6f0 [dvb_usb]
[ 36.667305@0] [<ffffffbffc2850cc>] tbs5520se_probe+0x34/0x50 [dvb_usb_tbs5520se]
[ 36.667311@0] [<ffffffc001477cb0>] usb_probe_interface+0xd8/0x1e8
[ 36.667315@0] [<ffffffc0013ec3ec>] really_probe+0x74/0x230
[ 36.667318@0] [<ffffffc0013ec610>] __device_attach+0x68/0x78
[ 36.667321@0] [<ffffffc0013ea61c>] bus_for_each_drv+0x64/0xa8
[ 36.667325@0] [<ffffffc0013ec344>] device_attach+0xa4/0xd8
[ 36.667328@0] [<ffffffc0013eb7ec>] bus_probe_device+0x9c/0xc8
[ 36.667330@0] [<ffffffc0013e92f8>] device_add+0x378/0x520
[ 36.667334@0] [<ffffffc0014765c8>] usb_set_configuration+0x440/0x7c8
[ 36.667338@0] [<ffffffc0014808b8>] generic_probe+0x38/0xc0
[ 36.667340@0] [<ffffffc001476a24>] usb_probe_device+0x24/0x38
[ 36.667344@0] [<ffffffc0013ec3ec>] really_probe+0x74/0x230
[ 36.667347@0] [<ffffffc0013ec610>] __device_attach+0x68/0x78
[ 36.667350@0] [<ffffffc0013ea61c>] bus_for_each_drv+0x64/0xa8
[ 36.667353@0] [<ffffffc0013ec344>] device_attach+0xa4/0xd8
[ 36.667356@0] [<ffffffc0013eb7ec>] bus_probe_device+0x9c/0xc8
[ 36.667359@0] [<ffffffc0013e92f8>] device_add+0x378/0x520
[ 36.667362@0] [<ffffffc00146d71c>] usb_new_device+0x1e4/0x320
[ 36.667364@0] [<ffffffc00146ed9c>] hub_thread+0xc54/0x1028
[ 36.667370@0] [<ffffffc0010b95fc>] kthread+0xd4/0xf0
[ 36.667372@0] ---[ end trace bc4a632bd562acf6 ]---
[ 36.667592@0] dvbdev: dvb_register_device: failed to create device dvb0.frontend1 (-17)
[ 36.668750@2] dvb-usb: TBS 5520se USB2.0 successfully initialized and connected.
