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Date: Tue, 30 Dec 2014 22:11:37 +0100 From: "Stefan Lippers-Hollmann" <s.L-H@....de> To: jarod@...sonet.com Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org, m.chehab@...sung.com, James Hogan <james.hogan@...tec.com>, "David Härdeman" <david@...deman.nu>, "Antti Seppälä" <a.seppala@...il.com>, Tomas Melin <tomas.melin@....fi> Subject: Re: mceusb: sysfs: cannot create duplicate filename '/class/rc/rc0' (race condition between multiple RC_CORE devices) Hi Adding the maintainers for drivers/media/rc/rc-main.c into the loop. This is a follow-up for: http://lkml.kernel.org/r/<201412181916.18051.s.L-H@....de> On Thursday 18 December 2014, Stefan Lippers-Hollmann wrote: > Occassionally, but not readily reproducably, I hit a race condition > between mceusb and other connected RC_CORE devices when mceusb tries > to create /class/rc/rc0, which is -by then- already taken by another > RC_CORE device. The other involved IR devices (physically only one) > are part of a PCIe TeVii s480 s2.1 twin-tuner DVB-S2 card and aren't > actually supposed to receive IR signals (IR receiver not connected): > > mceusb device transceiver: > Bus 002 Device 004: ID 0609:0334 SMK Manufacturing, Inc. eHome Infrared Receiver > > DVB-T receiver (no RC_CORE device) > Bus 001 Device 004: ID 0ccd:0069 TerraTec Electronic GmbH Cinergy T XE (Version 2, AF9015) > > twin-tuner DVB-S2 PCIe device, TeVii s480 v2.1 (physically one IR > receiver (NEC protocol), logically recognized as two RC_CORE devices): [...] > Bus 006 Device 003: ID 9022:d660 TeVii Technology Ltd. DVB-S2 S660 > Bus 003 Device 003: ID 9022:d660 TeVii Technology Ltd. DVB-S2 S660 Today I got a new, similar, trace with kernel 3.18.1, but this is not a regression and randomly happens with older kernels as well. The frequency of this occuring differs vastly, this time it was 12 days with probably 20 (re-)boots, before that it didn't happen for multiple weeks. I can not totally rule out if it ever happened in the reverse detection/ initialisation order, as I wouldn't notice the consequences of dvb_usb_dw2102's RC_CORE devices failing to initialise, but I think the problem might be seated in the common core of rc-main.c. usb 1-1.5: New USB device found, idVendor=0ccd, idProduct=0069 usb 1-1.5: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 1-1.5: Product: Cinergy T USB XE Ver.2 usb 1-1.5: Manufacturer: TerraTec usb 1-1.5: SerialNumber: 10012007 [...] dvb-usb: found a 'TeVii S480.1 USB' in cold state, will try to load a firmware dvb-usb: downloading firmware from file 'dvb-usb-s660.fw' dw2102: start downloading DW210X firmware usb 1-1.5: dvb_usb_v2: found a 'TerraTec Cinergy T USB XE' in cold state usb 1-1.5: dvb_usb_v2: downloading firmware from file 'dvb-usb-af9015.fw' [...] usb 2-1.6: New USB device found, idVendor=0609, idProduct=0334 usb 2-1.6: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 2-1.6: Product: MCE TRANCEIVR Emulator Device 2006 usb 2-1.6: Manufacturer: SMK CORPORATION usb 2-1.6: SerialNumber: PA070620045513C [...] usb 3-1: USB disconnect, device number 2 usb 2-1.8: new full-speed USB device number 5 using ehci-pci usb 1-1.5: dvb_usb_v2: found a 'TerraTec Cinergy T USB XE' in warm state [...] dvb-usb: found a 'TeVii S480.1 USB' in warm state. dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. DVB: registering new adapter (TeVii S480.1 USB) dvb-usb: MAC address: 70:70:70:70:70:70 Invalid probe, probably not a DS3000 dvb-usb: no frontend was attached by 'TeVii S480.1 USB' [...] Registered IR keymap rc-tevii-nec input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1c.5/0000:04:00.1/usb3/3-1/rc/rc0/input18 rc0: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1c.5/0000:04:00.1/usb3/3-1/rc/rc0 dvb-usb: schedule remote query interval to 150 msecs. dvb-usb: TeVii S480.1 USB successfully initialized and connected. dvb-usb: found a 'TeVii S480.2 USB' in cold state, will try to load a firmware dvb-usb: downloading firmware from file 'dvb-usb-s660.fw' dw2102: start downloading DW210X firmware [...] Registered IR keymap rc-rc6-mce ------------[ cut here ]------------ WARNING: CPU: 1 PID: 311 at /tmp/buildd/linux-aptosid-3.18/fs/sysfs/dir.c:31 sysfs_warn_dup+0x55/0x70() sysfs: cannot create duplicate filename '/class/rc/rc0' Modules linked in: rt2800usb(+) rt2x00usb rt2800lib rt2x00lib mac80211 cfg80211 crc_ccitt rc_rc6_mce mceusb(+) rc_tevii_nec ds3000 nls_utf8 nls_cp437 vfat fat iTCO_wdt iTCO_vendor_support eeepc_wmi asus_wmi intel_rapl sparse_keymap rfkill x86_pkg_temp_thermal evdev intel_powerclamp coretemp kvm_intel kvm snd_hda_codec_hdmi crct10dif_pclmul crc32_pclmul ghash_clmulni_intel snd_hda_codec_realtek snd_hda_codec_generic aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper dvb_usb_af9015(+) cryptd dvb_usb_v2 dvb_usb_dw2102(+) dvb_usb dvb_core rc_core psmouse snd_hda_intel pcspkr snd_hda_controller serio_raw i2c_i801 snd_hda_codec snd_hwdep snd_pcm snd_timer snd soundcore lpc_ich mfd_core battery tpm_infineon i915 video i2c_algo_bit drm_kms_helper drm i2c_core intel_gtt ie31200_edac mei_me edac_core mei wmi button processor nct6775 hwmon_vid fuse parport_pc ppdev lp parport autofs4 ext4 crc16 jbd2 mbcache dm_mod sg sd_mod ohci_pci crc32c_intel ahci libahci libata scsi_mod xhci_pci ohci_hcd ehci_pci xhci_hcd ehci_hcd r8169 mii usbcore usb_common fan thermal CPU: 1 PID: 311 Comm: systemd-udevd Not tainted 3.18.0-1.slh.1-aptosid-amd64 #1 aptosid 3.18-5 Hardware name: System manufacturer System Product Name/P8H77-M PRO, BIOS 1503 03/17/2014 0000000000000009 00000000cedd943b 0000000000000009 ffffffff814ddd08 ffff8807f06db8a0 ffffffff8105f3fd ffff8807f2091000 ffff8807f00bfa40 ffff8807f20128e8 ffff8807f20128e8 ffffffffffffffef ffffffff8105f478 Call Trace: [<ffffffff814ddd08>] ? dump_stack+0x49/0x6a [<ffffffff8105f3fd>] ? warn_slowpath_common+0x6d/0x90 [<ffffffff8105f478>] ? warn_slowpath_fmt+0x58/0x80 [<ffffffff811e8042>] ? kernfs_path+0x42/0x50 [<ffffffff811eb3d5>] ? sysfs_warn_dup+0x55/0x70 [<ffffffff811eb72e>] ? sysfs_do_create_link_sd.isra.2+0xbe/0xd0 [<ffffffff81362f24>] ? device_add+0x3b4/0x660 [<ffffffffa01328ec>] ? rc_register_device+0x1bc/0x600 [rc_core] [<ffffffffa0d5bf55>] ? mceusb_dev_probe+0x405/0xadd [mceusb] [<ffffffff8126eaf8>] ? ida_get_new_above+0x1f8/0x220 [<ffffffffa005c69b>] ? usb_probe_interface+0x1ab/0x2d0 [usbcore] [<ffffffff81365c87>] ? driver_probe_device+0x87/0x260 [<ffffffff81365f2b>] ? __driver_attach+0x7b/0x80 [<ffffffff81365eb0>] ? __device_attach+0x50/0x50 [<ffffffff81363d4b>] ? bus_for_each_dev+0x6b/0xc0 [<ffffffff81365428>] ? bus_add_driver+0x178/0x230 [<ffffffff8136655e>] ? driver_register+0x5e/0xf0 [<ffffffffa005b04b>] ? usb_register_driver+0x7b/0x160 [usbcore] [<ffffffffa0d5f000>] ? 0xffffffffa0d5f000 [<ffffffffa0d5f000>] ? 0xffffffffa0d5f000 [<ffffffff81002108>] ? do_one_initcall+0x98/0x200 [<ffffffff810cf144>] ? load_module+0x1ce4/0x22b0 [<ffffffff810cc330>] ? __symbol_put+0xa0/0xa0 [<ffffffff811804de>] ? kernel_read+0x4e/0x80 [<ffffffff810cf87d>] ? SyS_finit_module+0x8d/0xa0 [<ffffffff814e3d29>] ? system_call_fastpath+0x12/0x17 ---[ end trace 1b9fabfd70d94467 ]--- mceusb 2-1.6:1.0: remote dev registration failed mceusb 2-1.6:1.0: mceusb_dev_probe: device setup failed! mceusb: probe of 2-1.6:1.0 failed with error -12 usbcore: registered new interface driver mceusb dvb-usb: TeVii S480.1 USB successfully deinitialized and disconnected. usb 6-1: USB disconnect, device number 2 usb 2-1.5: reset high-speed USB device number 3 using ehci-pci dvb-usb: found a 'TeVii S480.2 USB' in warm state. dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. DVB: registering new adapter (TeVii S480.2 USB) dvb-usb: MAC address: 28:28:28:28:28:28 Invalid probe, probably not a DS3000 dvb-usb: no frontend was attached by 'TeVii S480.2 USB' Registered IR keymap rc-tevii-nec input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1c.5/0000:04:00.3/usb6/6-1/rc/rc0/input20 rc0: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1c.5/0000:04:00.3/usb6/6-1/rc/rc0 dvb-usb: schedule remote query interval to 150 msecs. dvb-usb: TeVii S480.2 USB successfully initialized and connected. usbcore: registered new interface driver dw2102 dvb-usb: TeVii S480.2 USB successfully deinitialized and disconnected. [...] usb 1-1.5: dvb_usb_v2: will pass the complete MPEG2 transport stream to the software demuxer DVB: registering new adapter (TerraTec Cinergy T USB XE) i2c i2c-9: af9013: firmware version 5.1.0.0 usb 1-1.5: DVB: registering adapter 0 frontend 0 (Afatech AF9013)... mc44s803: successfully identified (ID = 14) usb 1-1.5: dvb_usb_v2: 'TerraTec Cinergy T USB XE' successfully initialized and connected usbcore: registered new interface driver dvb_usb_af9015 [...] usb 3-1: new high-speed USB device number 3 using ehci-pci usb 3-1: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 2 usb 3-1: New USB device found, idVendor=9022, idProduct=d660 usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 3-1: Product: DVBS2BOX usb 3-1: Manufacturer: TBS-Tech dvb-usb: found a 'TeVii S660 USB' in cold state, will try to load a firmware dvb-usb: downloading firmware from file 'dvb-usb-s660.fw' dw2102: start downloading DW210X firmware usb 6-1: new high-speed USB device number 3 using ehci-pci [...] dvb-usb: found a 'TeVii S660 USB' in warm state. dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. DVB: registering new adapter (TeVii S660 USB) usb 6-1: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 2 usb 6-1: New USB device found, idVendor=9022, idProduct=d660 usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 usb 6-1: Product: DVBS2BOX usb 6-1: Manufacturer: TBS-Tech dvb-usb: found a 'TeVii S660 USB' in cold state, will try to load a firmware dvb-usb: downloading firmware from file 'dvb-usb-s660.fw' dw2102: start downloading DW210X firmware dvb-usb: found a 'TeVii S660 USB' in warm state. dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. DVB: registering new adapter (TeVii S660 USB) dvb-usb: MAC address: 00:18:bd:5a:be:8b DS3000 chip version: 0.192 attached. ts2020_attach: Find tuner TS2020! dw2102: Attached ds3000+ts2020! usb 3-1: DVB: registering adapter 1 frontend 0 (Montage Technology DS3000)... Registered IR keymap rc-tevii-nec input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1c.5/0000:04:00.1/usb3/3-1/rc/rc0/input25 rc0: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1c.5/0000:04:00.1/usb3/3-1/rc/rc0 dvb-usb: schedule remote query interval to 150 msecs. dvb-usb: TeVii S660 USB successfully initialized and connected. dvb-usb: MAC address: 00:18:bd:5a:be:8c DS3000 chip version: 0.192 attached. ts2020_attach: Find tuner TS2020! dw2102: Attached ds3000+ts2020! usb 6-1: DVB: registering adapter 2 frontend 0 (Montage Technology DS3000)... Registered IR keymap rc-tevii-nec input: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1c.5/0000:04:00.3/usb6/6-1/rc/rc1/input26 rc1: IR-receiver inside an USB DVB receiver as /devices/pci0000:00/0000:00:1c.5/0000:04:00.3/usb6/6-1/rc/rc1 dvb-usb: schedule remote query interval to 150 msecs. dvb-usb: TeVii S660 USB successfully initialized and connected. [...] ds3000_firmware_ondemand: Waiting for firmware upload (dvb-fe-ds3000.fw)... ds3000_firmware_ondemand: Waiting for firmware upload(2)... ds3000_firmware_ondemand: Waiting for firmware upload (dvb-fe-ds3000.fw)... ds3000_firmware_ondemand: Waiting for firmware upload(2)... [...] This can be recovered by reloading mceusb # modprobe -r mceusb # modprobe mceusb [...] usbcore: deregistering interface driver mceusb Registered IR keymap rc-rc6-mce input: Media Center Ed. eHome Infrared Remote Transceiver (0609:0334) as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6/2-1.6:1.0/rc/rc2/input27 rc2: Media Center Ed. eHome Infrared Remote Transceiver (0609:0334) as /devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.6/2-1.6:1.0/rc/rc2 IR Sony protocol handler initialized IR JVC protocol handler initialized IR RC5(x/sz) protocol handler initialized IR RC6 protocol handler initialized input: MCE IR Keyboard/Mouse (mceusb) as /devices/virtual/input/input28 IR MCE Keyboard/mouse protocol handler initialized IR NEC protocol handler initialized IR Sharp protocol handler initialized IR XMP protocol handler initialized IR SANYO protocol handler initialized lirc_dev: IR Remote Control driver registered, major 249 rc rc2: lirc_dev: driver ir-lirc-codec (mceusb) registered at minor = 0 IR LIRC bridge handler initialized mceusb 2-1.6:1.0: Registered SMK CORPORATION MCE TRANCEIVR Emulator Device 2006 with mce emulator interface version 1 mceusb 2-1.6:1.0: 2 tx ports (0x0 cabled) and 2 rx sensors (0x1 active) usbcore: registered new interface driver mceusb [...] Regards Stefan Lippers-Hollmann -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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