[linux-dvb] HVR-1500Q eeprom not being parsed correctly

Patrick Boisvenue patrbois at magma.ca
Fri Sep 12 21:16:41 CEST 2008


Patrick Boisvenue wrote:
> Michael Krufky wrote:
>> On Fri, Sep 12, 2008 at 2:24 PM, Patrick Boisvenue <patrbois at magma.ca> wrote:
>>> Andy Walls wrote:
>>>> On Wed, 2008-09-10 at 20:37 -0400, Patrick Boisvenue wrote:
>>>>> Andy Walls wrote:
>>>>>> On Tue, 2008-09-09 at 22:37 -0400, Steven Toth wrote:
>>>>>>> Patrick Boisvenue wrote:
>>>>>>>> Steven Toth wrote:
>>>>>>>>> Patrick Boisvenue wrote:
>>>>>>>> When launching dvbscan I get the following in dmesg:
>>>>>>>>
>>>>>>>> xc5000: waiting for firmware upload (dvb-fe-xc5000-1.1.fw)...
>>>>>>>> firmware: requesting dvb-fe-xc5000-1.1.fw
>>>>>>>> kobject_add_internal failed for i2c-2 with -EEXIST, don't try to
>>>>>>>> register things with the same name in the same directory.
>>>>>>>> Pid: 8059, comm: kdvb-fe-0 Tainted: P          2.6.26-gentoo #11
>>>>>>>>
>>>>>>>> Call Trace:
>>>>>>>>  [<ffffffff8036abb5>] kobject_add_internal+0x13f/0x17e
>>>>>>>>  [<ffffffff8036aff2>] kobject_add+0x74/0x7c
>>>>>>>>  [<ffffffff80230b02>] printk+0x4e/0x56
>>>>>>>>  [<ffffffff803eb84a>] device_add+0x9b/0x483
>>>>>>>>  [<ffffffff8036a876>] kobject_init+0x41/0x69
>>>>>>>>  [<ffffffff803f059d>] _request_firmware+0x169/0x324
>>>>>>>>  [<ffffffffa00e9a7e>] :xc5000:xc_load_fw_and_init_tuner+0x64/0x293
>>>>>>>>  [<ffffffff804a7222>] i2c_transfer+0x75/0x7f
>>>>>>>>  [<ffffffffa00e53ad>] :s5h1409:s5h1409_writereg+0x51/0x83
>>>>>>>>  [<ffffffffa00e9cea>] :xc5000:xc5000_init+0x3d/0x6f
>>>>>>>>  [<ffffffffa0091b0c>] :dvb_core:dvb_frontend_init+0x49/0x63
>>>>>>>>  [<ffffffffa0092e2c>] :dvb_core:dvb_frontend_thread+0x78/0x2f0
>>>>>>>>  [<ffffffffa0092db4>] :dvb_core:dvb_frontend_thread+0x0/0x2f0
>>>>>>>>  [<ffffffff80240eaf>] kthread+0x47/0x74
>>>>>>>>  [<ffffffff8022bc41>] schedule_tail+0x27/0x5b
>>>>>>>>  [<ffffffff8020be18>] child_rip+0xa/0x12
>>>>>>>>  [<ffffffff80240e68>] kthread+0x0/0x74
>>>>>>>>  [<ffffffff8020be0e>] child_rip+0x0/0x12
>>>>>>>>
>>>>>>>> fw_register_device: device_register failed
>>>>>>>> xc5000: Upload failed. (file not found?)
>>>>>>>> xc5000: Unable to initialise tuner
>>>>>>>>
>>>>>>>>
>>>>>>>> I have the firmware file located here:
>>>>>>>>
>>>>>>>> # ls -l /lib/firmware/dvb-fe-xc5000-1.1.fw
>>>>>>>> -rw-r--r-- 1 root root 12332 Aug 31 12:56
>>>>>>>> /lib/firmware/dvb-fe-xc5000-1.1.fw
>>>>>>>>
>>>>>>>> If there is anything else I can provide (or try) to help debug, let me
>>>>>>>> know,
>>>>>>>> ...Patrick
>>>>>>>  > kobject_add_internal failed for i2c-2 with -EEXIST, don't try to
>>>>>>>  > register things with the same name in the same directory.
>>>>>>>
>>>>>>> Ooh, that's nasty problem, this is new - and looks like it's i2c related.
>>>>>>>
>>>>>>> Why does this sound familiar? Anyone?
>>>>>> A cx18 user had a similar problem on one distro.  I remeber running it
>>>>>> down to a race condition in creating device nodes in one of the
>>>>>> "virtual" filesystems (/proc or /sys) the device was looking for a
>>>>>> paretn PCI device entry to hook onto, but it wasn't created at the time
>>>>>> so it tries to create it itself.  In the meantime some other part of the
>>>>>> kernel subsystem did actually finish creating the entry - so it exists
>>>>>> by the time the firmware load tries to make it.
>>>>>>
>>>>>> As far as I could tell, it should be non-fatal (not an Oops or panic),
>>>>>> but if the driver gives up on -EEXIST then things won't work obviously.
>>>>>>
>>>>>> I never resolved the problem for the user.  I think some kernel change
>>>>>> outside of cx18 resolved it.  That's all the details I have.
>>>>>>
>>>>>> Regards,
>>>>>> Andy
>>>>>>
>>>>> So what are my options?
>>>> Good question.  I don't know.  Working with kobjects is way out of my
>>>> knowledge base.
>>>>
>>>> I looked at the kernel code long enough to decide that without being
>>>> able to reproduce the problem myself, I won't be able to spot the root
>>>> cause.  Part of the reason is that this problem is about looking for and
>>>> creating sysfs objects as it relates to driver probing and firmware
>>>> loading.  I couldn't quite sort out what had to happen in series and
>>>> what the kernel could be executing in parallel.
>>>>
>>>> I think your best option would be to post to the LKML or wherever else
>>>> the sysfs and kobject experts hang out.
>>>>
>>>> Another option could be to modify the driver code that gives up when the
>>>> firmware operation returns an error code because a sysfs device node
>>>> already exists (-EEXIST).  That's no big deal, and a driver should be
>>>> able to merrily go forward, if it can easily detect the condition.
>>>>
>>>>
>>> More observations before I go bother people LKML.  This is the error
>>> with an older 2.6.25 kernel.  The dmesg output is more interesting.
>>>
>>>
>>> xc5000: waiting for firmware upload (dvb-fe-xc5000-1.1.fw)...
>>>
>>>
>>> sysfs: duplicate filename 'i2c-1' can not be created
>>>
>>>
>> Patrick,
>>
>> This particular issue may have been fixed by my recent xc5000 patches
>> that were merged into the master branch a few days ago...
>>
>> Try pulling the v4l-dvb master branch -- that might help.
>>
>> HTH,
>>
>> Mike
> 
> No change.  Same error.  Just to confirm I'm up to date, this is an 
> output of "hg heads" for what I pulled in.
> 
> changeset:   8964:e5ca4534b543
> tag:         tip
> user:        Mauro Carvalho Chehab <mchehab at redhat.com>
> date:        Tue Sep 09 08:29:56 2008 -0700
> summary:     s2255drv field count fix
> 
> changeset:   8924:c793bb42e052
> user:        Steven Toth <stoth at linuxtv.org>
> date:        Tue Sep 09 10:52:06 2008 -0400
> summary:     cx23885: Fix for HVR1500Q eeprom offset decoding
> 
> ...Patrick
> 

see new dmesg output at end of message.

> 
>>> ------------[ cut here ]------------
>>>
>>>
>>> WARNING: at fs/sysfs/dir.c:424 sysfs_add_one+0x3f/0x93()
>>>
>>>
>>> Modules linked in: wlan_wep xc5000 s5h1409 cx23885 compat_ioctl32
>>> videodev v4l1_compat cx2341x wlan_scan_sta videobuf_dma_sg
>>> ath_rate_sample v4l2_common btcx_risc tveeprom ath_pci videobuf_dvb
>>> dvb_core wlan ath_hal(P) videobuf_core
>>>
>>> Pid: 7730, comm: kdvb-fe-0 Tainted: P         2.6.25-gentoo-r6 #2
>>>
>>>
>>>
>>> Call Trace:
>>>  [<ffffffff8023019d>] warn_on_slowpath+0x51/0x63
>>>  [<ffffffff80230ef4>] printk+0x4e/0x56
>>>  [<ffffffff8029143a>] find_inode+0x28/0x6d
>>>  [<ffffffff802bea5c>] sysfs_ilookup_test+0x0/0xf
>>>  [<ffffffff8029156e>] ifind+0x44/0x8d
>>>  [<ffffffff802bec58>] sysfs_find_dirent+0x1b/0x2f
>>>  [<ffffffff802becab>] sysfs_add_one+0x3f/0x93
>>>  [<ffffffff802bf1fe>] create_dir+0x4f/0x87
>>>  [<ffffffff802bf26b>] sysfs_create_dir+0x35/0x4a
>>>  [<ffffffff80366f6a>] kobject_get+0x12/0x17
>>>  [<ffffffff8036708f>] kobject_add_internal+0xc3/0x17e
>>>  [<ffffffff80367224>] kobject_add_varg+0x54/0x61
>>>  [<ffffffff802296d6>] __wake_up+0x38/0x4f
>>>  [<ffffffff80367581>] kobject_add+0x74/0x7c
>>>  [<ffffffff880cb43e>] :cx23885:i2c_readbytes+0x1ae/0x25d
>>>  [<ffffffff80230ef4>] printk+0x4e/0x56
>>>  [<ffffffff803e647a>] device_add+0x85/0x4a4
>>>  [<ffffffff80366e05>] kobject_init+0x41/0x69
>>>  [<ffffffff803ebe58>] _request_firmware+0x154/0x30f
>>>  [<ffffffff880e3a7e>] :xc5000:xc_load_fw_and_init_tuner+0x64/0x293
>>>  [<ffffffff804ac2c7>] i2c_transfer+0x75/0x7f
>>>  [<ffffffff880df3ad>] :s5h1409:s5h1409_writereg+0x51/0x83
>>>  [<ffffffff880e3cea>] :xc5000:xc5000_init+0x3d/0x6f
>>>  [<ffffffff8806ab0c>] :dvb_core:dvb_frontend_init+0x49/0x63
>>>  [<ffffffff8806be8d>] :dvb_core:dvb_frontend_thread+0x78/0x307
>>>  [<ffffffff8806be15>] :dvb_core:dvb_frontend_thread+0x0/0x307
>>>  [<ffffffff80241392>] kthread+0x47/0x75
>>>  [<ffffffff8022bc6a>] schedule_tail+0x27/0x5c
>>>  [<ffffffff8020bc88>] child_rip+0xa/0x12
>>>  [<ffffffff8024134b>] kthread+0x0/0x75
>>>  [<ffffffff8020bc7e>] child_rip+0x0/0x12
>>>
>>> ---[ end trace 01bdacc4ebef05bf ]---
>>> kobject_add_internal failed for i2c-1 with -EEXIST, don't try to
>>> register things with the same name in the same directory.
>>> Pid: 7730, comm: kdvb-fe-0 Tainted: P         2.6.25-gentoo-r6 #2
>>>
>>> Call Trace:
>>>  [<ffffffff8036710b>] kobject_add_internal+0x13f/0x17e
>>>  [<ffffffff80367224>] kobject_add_varg+0x54/0x61
>>>  [<ffffffff802296d6>] __wake_up+0x38/0x4f
>>>  [<ffffffff80367581>] kobject_add+0x74/0x7c
>>>  [<ffffffff880cb43e>] :cx23885:i2c_readbytes+0x1ae/0x25d
>>>  [<ffffffff80230ef4>] printk+0x4e/0x56
>>>  [<ffffffff803e647a>] device_add+0x85/0x4a4
>>>  [<ffffffff80366e05>] kobject_init+0x41/0x69
>>>  [<ffffffff803ebe58>] _request_firmware+0x154/0x30f
>>>  [<ffffffff880e3a7e>] :xc5000:xc_load_fw_and_init_tuner+0x64/0x293
>>>  [<ffffffff804ac2c7>] i2c_transfer+0x75/0x7f
>>>  [<ffffffff880df3ad>] :s5h1409:s5h1409_writereg+0x51/0x83
>>>  [<ffffffff880e3cea>] :xc5000:xc5000_init+0x3d/0x6f
>>>  [<ffffffff8806ab0c>] :dvb_core:dvb_frontend_init+0x49/0x63
>>>  [<ffffffff8806be8d>] :dvb_core:dvb_frontend_thread+0x78/0x307
>>>  [<ffffffff8806be15>] :dvb_core:dvb_frontend_thread+0x0/0x307
>>>  [<ffffffff80241392>] kthread+0x47/0x75
>>>  [<ffffffff8022bc6a>] schedule_tail+0x27/0x5c
>>>  [<ffffffff8020bc88>] child_rip+0xa/0x12
>>>  [<ffffffff8024134b>] kthread+0x0/0x75
>>>  [<ffffffff8020bc7e>] child_rip+0x0/0x12
>>>
>>> fw_register_device: device_register failed
>>> xc5000: Upload failed. (file not found?)
>>> xc5000: Unable to initialise tuner
> 

Attaching new dmesg output anyway since the address offsets have changed:

xc5000: waiting for firmware upload (dvb-fe-xc5000-1.1.fw)... 

sysfs: duplicate filename 'i2c-1' can not be created 

------------[ cut here ]------------ 

WARNING: at fs/sysfs/dir.c:424 sysfs_add_one+0x3f/0x93() 

Modules linked in: xc5000 s5h1409 cx23885 compat_ioctl32 videodev 
v4l1_compat cx2341x videobuf_dma_sg v4l2_common btcx_risc tveeprom 
videobuf_dvb dvb_core videobuf_core wlan_wep wlan_scan_sta 
ath_rate_sample ath_pci wlan ath_hal(P) [last unloaded: v4l1_compat] 

Pid: 13677, comm: kdvb-fe-0 Tainted: P         2.6.25-gentoo-r6 #2 
 


Call Trace:
  [<ffffffff8023019d>] warn_on_slowpath+0x51/0x63
  [<ffffffff80230ef4>] printk+0x4e/0x56
  [<ffffffff8029143a>] find_inode+0x28/0x6d
  [<ffffffff802bea5c>] sysfs_ilookup_test+0x0/0xf
  [<ffffffff8029156e>] ifind+0x44/0x8d
  [<ffffffff802bec58>] sysfs_find_dirent+0x1b/0x2f
  [<ffffffff802becab>] sysfs_add_one+0x3f/0x93
  [<ffffffff802bf1fe>] create_dir+0x4f/0x87
  [<ffffffff802bf26b>] sysfs_create_dir+0x35/0x4a
  [<ffffffff80366f6a>] kobject_get+0x12/0x17
  [<ffffffff8036708f>] kobject_add_internal+0xc3/0x17e
  [<ffffffff80367224>] kobject_add_varg+0x54/0x61
  [<ffffffff802296d6>] __wake_up+0x38/0x4f
  [<ffffffff80367581>] kobject_add+0x74/0x7c
  [<ffffffff880cb43e>] :cx23885:i2c_readbytes+0x1ae/0x25d
  [<ffffffff80230ef4>] printk+0x4e/0x56
  [<ffffffff803e647a>] device_add+0x85/0x4a4
  [<ffffffff80366e05>] kobject_init+0x41/0x69
  [<ffffffff803ebe58>] _request_firmware+0x154/0x30f
  [<ffffffff880e2a29>] :xc5000:xc_load_fw_and_init_tuner+0x64/0x2ad
  [<ffffffff804ac2c7>] i2c_transfer+0x75/0x7f
  [<ffffffff880de3ad>] :s5h1409:s5h1409_writereg+0x51/0x83
  [<ffffffff880e2caf>] :xc5000:xc5000_init+0x3d/0x6f
  [<ffffffff8806ab0c>] :dvb_core:dvb_frontend_init+0x49/0x63
  [<ffffffff8806be8d>] :dvb_core:dvb_frontend_thread+0x78/0x307
  [<ffffffff8806be15>] :dvb_core:dvb_frontend_thread+0x0/0x307
  [<ffffffff80241392>] kthread+0x47/0x75
  [<ffffffff8022bc6a>] schedule_tail+0x27/0x5c
  [<ffffffff8020bc88>] child_rip+0xa/0x12
  [<ffffffff8024134b>] kthread+0x0/0x75
  [<ffffffff8020bc7e>] child_rip+0x0/0x12

---[ end trace 01bdacc4ebef05bf ]---
kobject_add_internal failed for i2c-1 with -EEXIST, don't try to 
register things with the same name in the same directory.
Pid: 13677, comm: kdvb-fe-0 Tainted: P         2.6.25-gentoo-r6 #2

Call Trace:
  [<ffffffff8036710b>] kobject_add_internal+0x13f/0x17e
  [<ffffffff80367224>] kobject_add_varg+0x54/0x61
  [<ffffffff802296d6>] __wake_up+0x38/0x4f
  [<ffffffff80367581>] kobject_add+0x74/0x7c
  [<ffffffff880cb43e>] :cx23885:i2c_readbytes+0x1ae/0x25d
  [<ffffffff80230ef4>] printk+0x4e/0x56
  [<ffffffff803e647a>] device_add+0x85/0x4a4
  [<ffffffff80366e05>] kobject_init+0x41/0x69
  [<ffffffff803ebe58>] _request_firmware+0x154/0x30f
  [<ffffffff880e2a29>] :xc5000:xc_load_fw_and_init_tuner+0x64/0x2ad
  [<ffffffff804ac2c7>] i2c_transfer+0x75/0x7f
  [<ffffffff880de3ad>] :s5h1409:s5h1409_writereg+0x51/0x83
  [<ffffffff880e2caf>] :xc5000:xc5000_init+0x3d/0x6f
  [<ffffffff8806ab0c>] :dvb_core:dvb_frontend_init+0x49/0x63
  [<ffffffff8806be8d>] :dvb_core:dvb_frontend_thread+0x78/0x307
  [<ffffffff8806be15>] :dvb_core:dvb_frontend_thread+0x0/0x307
  [<ffffffff80241392>] kthread+0x47/0x75
  [<ffffffff8022bc6a>] schedule_tail+0x27/0x5c
  [<ffffffff8020bc88>] child_rip+0xa/0x12
  [<ffffffff8024134b>] kthread+0x0/0x75
  [<ffffffff8020bc7e>] child_rip+0x0/0x12

fw_register_device: device_register failed
xc5000: Upload failed. (file not found?)
xc5000: Unable to initialise tuner




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