managed to bisect this and found the commit from where it broke.
this one does not work:
0d3ab84 [media] dvb core: must check dvb_create_media_graph()
but the commit just before do work:
13f6e88 [media] v4l2 core: enable all interface links at init
unfortunately i know too little of the code to understand why it broke.
while doing this i learned several other things, like it is not fun to
try to bisect thru the non media changes (kernel update i think).
and in media_build backports/api_version.patch tends to not apply
cleanly sometimes so had to go back to media_build commit 2679653 to do
the testing.
On 2016-02-06 11:46, Torbjorn Jansson wrote:
Hello.
i was testing media_build on a test vm with one of my usb dvb-t2 devices.
a few weeks ago this worked fine and modules loaded but now during boot
i get the below errors in dmesg.
any idea whats going on?
can someone also tell me how to go back to an earlier version or point
me to where i can do some reading about it so i can try to find out when
it broke?
----
[ 5.377423] WARNING: You are using an experimental version of the
media stack.
As the driver is backported to an older kernel, it
doesn't offer
enough quality for its usage in production.
Use it with care.
Latest git patches (needed if you report a bug to
linux-media@xxxxxxxxxxxxxxx):
e545ac872ff884801a48beb7e6e0fc7513555fd9 [media]
tvp5150: Add pad-level subdev operations
4f57d27be2a5a10ad042fcfd97c5ea9f4d5215f7 [media]
tvp5150: fix tvp5150_fill_fmt()
841502d731f1708aae907d5bdf1659e8a372fc9a Revert [media]
tvp5150: Fix breakage for serial usage
[ 5.559672] usb 1-5: dvb_usb_v2: found a 'TechnoTrend TT-connect
CT2-4650 CI v1.1' in warm state
[ 5.559759] usb 1-5: dvb_usb_v2: will pass the complete MPEG2
transport stream to the software demuxer
[ 5.559777] DVB: registering new adapter (TechnoTrend TT-connect
CT2-4650 CI v1.1)
[ 5.559781] usb 1-5: media controller created
[ 5.561329] usb 1-5: dvb_usb_v2: MAC address: bc:ea:2b:65:06:6f
[ 5.561816] dvb_create_media_entity: media entity 'dvb-demux'
registered.
[ 5.566366] i2c i2c-1: Added multiplexed i2c bus 2
[ 5.566369] si2168 1-0064: Silicon Labs Si2168 successfully attached
[ 5.577179] si2157 2-0060: Silicon Labs Si2147/2148/2157/2158
successfully attached
[ 5.587843] dvb_create_media_entity: media entity 'dvb-ca-en50221'
registered.
[ 5.588476] sp2 1-0040: CIMaX SP2 successfully attached
[ 5.588484] usb 1-5: DVB: registering adapter 0 frontend 0 (Silicon
Labs Si2168)...
[ 5.588488] dvb_create_media_entity: media entity 'Silicon Labs
Si2168' registered.
[ 5.591376] ------------[ cut here ]------------
[ 5.591383] WARNING: CPU: 1 PID: 560 at lib/idr.c:1051
ida_remove+0xef/0x120()
[ 5.591384] ida_remove called for id=512 which is not allocated.
[ 5.591385] Modules linked in: sp2(OE) si2157(OE) si2168(OE)
dvb_usb_dvbsky(OE+) m88ds3103(OE) dvb_usb_v2(OE) i2c_mux dvb_core(OE)
rc_core(OE) media(OE) joydev ppdev iosf_mbi crct10dif_pclmul
crc32_pclmul crc32c_intel snd_hda_codec_generic snd_hda_intel
snd_hda_codec snd_hda_core snd_hwdep snd_seq snd_seq_device
virtio_balloon snd_pcm snd_timer pvpanic snd parport_pc parport
i2c_piix4 soundcore acpi_cpufreq tpm_tis tpm qxl drm_kms_helper ttm
8021q garp stp virtio_console llc virtio_blk mrp virtio_net drm
serio_raw virtio_pci virtio_ring virtio ata_generic pata_acpi
[ 5.591436] CPU: 1 PID: 560 Comm: systemd-udevd Tainted: G OE
4.3.4-200.fc22.x86_64 #1
[ 5.591437] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 5.591438] 0000000000000000 00000000999f62be ffff8800369cb6f8
ffffffff813a625f
[ 5.591440] ffff8800369cb740 ffff8800369cb730 ffffffff810a07c2
ffff88007b61b3e8
[ 5.591442] ffff88007b61b3e8 0000000000000206 ffff8800369e3500
ffff88007b45c158
[ 5.591491] Call Trace:
[ 5.591504] [<ffffffff813a625f>] dump_stack+0x44/0x55
[ 5.591507] [<ffffffff810a07c2>] warn_slowpath_common+0x82/0xc0
[ 5.591516] [<ffffffff810a085c>] warn_slowpath_fmt+0x5c/0x80
[ 5.591519] [<ffffffff813bab85>] ? find_next_bit+0x15/0x20
[ 5.591521] [<ffffffff813a73ff>] ida_remove+0xef/0x120
[ 5.591523] [<ffffffff813a7e7b>] ida_simple_remove+0x2b/0x50
[ 5.591527] [<ffffffffa022004d>]
__media_device_unregister_entity+0x2d/0xd0 [media]
[ 5.591529] [<ffffffffa022011c>]
media_device_unregister_entity+0x2c/0x40 [media]
[ 5.591532] [<ffffffffa023a0ff>] dvb_media_device_free+0x1f/0x130
[dvb_core]
[ 5.591535] [<ffffffffa023a252>] dvb_unregister_device+0x42/0x80
[dvb_core]
[ 5.591539] [<ffffffffa0240a05>] dvb_ca_en50221_release+0x75/0xb0
[dvb_core]
[ 5.591541] [<ffffffffa0235289>] sp2_remove+0x49/0xa0 [sp2]
[ 5.591554] [<ffffffff815dc18b>] i2c_device_remove+0x4b/0xa0
[ 5.591557] [<ffffffff814d9501>] __device_release_driver+0xa1/0x150
[ 5.591566] [<ffffffff814d95d3>] device_release_driver+0x23/0x30
[ 5.591568] [<ffffffff814d8c21>] bus_remove_device+0x101/0x170
[ 5.591571] [<ffffffff814d4ec9>] device_del+0x139/0x260
[ 5.591573] [<ffffffff813a8647>] ? kobject_put+0x27/0x50
[ 5.591575] [<ffffffff815dc680>] ? __unregister_dummy+0x30/0x30
[ 5.591577] [<ffffffff814d500e>] device_unregister+0x1e/0x60
[ 5.591578] [<ffffffff815dc6be>] __unregister_client+0x3e/0x50
[ 5.591581] [<ffffffff814d4970>] device_for_each_child+0x50/0x90
[ 5.591583] [<ffffffff815de99e>] i2c_del_adapter+0x20e/0x300
[ 5.591586] [<ffffffff81203ed8>] ? kfree+0x128/0x130
[ 5.591599] [<ffffffffa0263974>] dvb_usbv2_exit+0x1c4/0x3c0
[dvb_usb_v2]
[ 5.591602] [<ffffffffa026444f>] dvb_usbv2_probe+0xff/0x1270
[dvb_usb_v2]
[ 5.591605] [<ffffffff814e4619>] ? __pm_runtime_set_status+0x189/0x230
[ 5.591616] [<ffffffff81570282>] usb_probe_interface+0x1b2/0x2d0
[ 5.591658] [<ffffffff814d9b82>] driver_probe_device+0x222/0x480
[ 5.591660] [<ffffffff814d9e64>] __driver_attach+0x84/0x90
[ 5.591662] [<ffffffff814d9de0>] ? driver_probe_device+0x480/0x480
[ 5.591663] [<ffffffff814d765c>] bus_for_each_dev+0x6c/0xc0
[ 5.591665] [<ffffffff814d933e>] driver_attach+0x1e/0x20
[ 5.591666] [<ffffffff814d8e7b>] bus_add_driver+0x1eb/0x280
[ 5.591668] [<ffffffff814da6b0>] driver_register+0x60/0xe0
[ 5.591670] [<ffffffff8156eb24>] usb_register_driver+0x84/0x140
[ 5.591672] [<ffffffffa003f000>] ? 0xffffffffa003f000
[ 5.591675] [<ffffffffa003f01e>] dvbsky_usb_driver_init+0x1e/0x1000
[dvb_usb_dvbsky]
[ 5.591677] [<ffffffff81002123>] do_one_initcall+0xb3/0x200
[ 5.591680] [<ffffffff8120427e>] ? kmem_cache_alloc_trace+0x19e/0x220
[ 5.591682] [<ffffffff811a4947>] ? do_init_module+0x27/0x1e5
[ 5.591684] [<ffffffff811a497f>] do_init_module+0x5f/0x1e5
[ 5.591688] [<ffffffff811254fe>] load_module+0x201e/0x2630
[ 5.591700] [<ffffffff811219c0>] ? __symbol_put+0x60/0x60
[ 5.591703] [<ffffffff81229830>] ? kernel_read+0x50/0x80
[ 5.591706] [<ffffffff81125d59>] SyS_finit_module+0xb9/0xf0
[ 5.591716] [<ffffffff8178182e>] entry_SYSCALL_64_fastpath+0x12/0x71
[ 5.591718] ---[ end trace 60bef98e54788a23 ]---
[ 5.592176] dvb_usb_dvbsky: probe of 1-5:1.0 failed with error -12
[ 5.592198] usbcore: registered new interface driver dvb_usb_dvbsky
----
--
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