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

Patrick Boisvenue patrbois at magma.ca
Tue Sep 16 14:05:24 CEST 2008



Markus Rechberger wrote:
> On Sat, Sep 13, 2008 at 3:25 AM, Andy Walls <awalls at radix.net> wrote:
>> On Fri, 2008-09-12 at 15:16 -0400, Patrick Boisvenue wrote:
>>> 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.
>>
>> OK.  Let's look at where these sysfs entries exist and then how they get
>> created.
>>
>>
>> First look for the relevant sysfs entries on your running system.
>> Here's an example from my system with a PVR-150 (i2c-0), an HVR-1600
>> (i2c-2 & i2c-3) and my mainboard (i2c-1):
>>
>> # find /sys -name "i2c-[0-9]" -print
>> /sys/devices/pci0000:00/0000:00:14.0/i2c-adapter/i2c-1
>> /sys/devices/pci0000:00/0000:00:14.4/0000:03:02.0/i2c-adapter/i2c-0
>> /sys/devices/pci0000:00/0000:00:14.4/0000:03:03.0/i2c-adapter/i2c-2
>> /sys/devices/pci0000:00/0000:00:14.4/0000:03:03.0/i2c-adapter/i2c-3
>> /sys/class/i2c-adapter/i2c-0
>> /sys/class/i2c-adapter/i2c-1
>> /sys/class/i2c-adapter/i2c-2
>> /sys/class/i2c-adapter/i2c-3
>>
>> You can also do this to see what's in the i2c-* directories:
>>
>> # find /sys -name "i2c-[0-9]" -print -exec ls -l {} \;
>>
>> So now you can know the i2c buses that loaded modules have registered on
>> your system.  You can look up the PCI or USB bus numbers to see which
>> device has which i2c-bus.
>>
>>
>>
>> Look at what firmwares are registered in the sysfs.  Here's an example
>> from my system with an PVR150 with a CX25843 decoder hanging off of the
>> I2C bus of a CX23416:
>>
>> # find /sys -name "firmware" -exec ls -ld {} \;
>> drwxr-xr-x 2 root root 0 2008-09-12 18:30 /sys/class/firmware
>> drwxr-xr-x 3 root root 0 2008-09-12 17:36 /sys/firmware
>> -r--r--r-- 1 root root 4096 2008-09-12 20:36 /sys/module/cx25840/parameters/firmware
>>
>> # cat /sys/module/cx25840/parameters/firmware
>> v4l-cx25840.fw
>>
>>
>> (I don't have a card with an XC5000 or XC3028.)
>>
>>
>>
>> Looking at the cx23885 driver core code, this is the sequence wind-up
>> from the driver being modprobed to one of these i2c-* sysfs directory
>> nodes initially getting created for the cx23885 device:
>>
>> drivers/media/video/cx23885/cx23885-core.c:cx23885_init()
>>                       include/linux/pci.h:pci_register_driver()
>>                  drivers/pci/pci-driver.c:__pci_register_driver()
>>                     drivers/base/driver.c:driver_register()
>>                        drivers/base/bus.c:bus_add_driver()
>>                         drivers/base/dd.c:driver_attach()
>>                        drivers/base/bus.c:bus_for_each_dev()
>>                         drivers/base/dd.c:__driver_attach()
>>                         drivers/base/dd.c:driver_probe_device()
>>                         drivers/base/dd.c:really_probe()
>>                  drivers/pci/pci-driver.c:pci_device_probe()
>>                  drivers/pci/pci-driver.c:__pci_device_probe()
>>                  drivers/pci/pci-driver.c:pci_call_probe()
>> drivers/media/video/cx23885/cx23885-core.c:cx23885_initdev()
>> drivers/media/video/cx23885/cx23885-core.c:cx23885_dev_setup()
>>  drivers/media/video/cx23885/cx23885-i2c.c:cx23885_i2c_register()
>>                    drivers/i2c/i2c-core.c:i2c_add_adapter()
>>                    drivers/i2c/i2c-core.c:i2c_register_adapter()
>>                       drivers/base/core.c:device_register()
>>                       drivers/base/core.c:device_add()
>>                             lib/kobject.c:kobject_add()
>>                             lib/kobject.c:kobject_add_varg()
>>                             lib/kobject.c:kobject_add_internal()
>>                             lib/kobject.c:create_dir()
>>                            fs/sysfs/dir.c:sysfs_create_dir()
>>
>>
>>
>> And here's the wind up to the system trying to create the node again
>> upon dvb frontend open that loads firmware to the xc5000 tuner hanging
>> off of that i2c bus:
>>
>> drivers/media/dvb/dvb-core/dvb_frontend.c:dvb_frontend_open()
>> drivers/media/dvb/dvb-core/dvb_frontend.c:dvb_frontend_start()
>>                  include/linux/kthread.h:kthread_run()
>>                         kernel/kthread.c:kthread_create()
>> drivers/media/dvb/dvb-core/dvb_frontend.c:dvb_frontend_thread()
>> drivers/media/dvb/dvb-core/dvb_frontend.c:dvb_frontend_init()
>>     drivers/media/common/tuners/xc5000.c:xc5000_init()
>>     drivers/media/common/tuners/xc5000.c:xc_load_fw_and_init_tuner()
>>     drivers/media/common/tuners/xc5000.c:xc5000_fw_upload()
>>            drivers/base/firmware_class.c:request_firmware()
>>            drivers/base/firmware_class.c:_request_firmware()
>>            drivers/base/firmware_class.c:fw_setup_device()
>>            drivers/base/firmware_class.c:fw_register_device()
>>                      drivers/base/core.c:device_register()
>>                      drivers/base/core.c:device_add()
>>                            lib/kobject.c:kobject_add()
>>                            lib/kobject.c:kobject_add_varg()
>>                            lib/kobject.c:kobject_add_internal()
>>                            lib/kobject.c:create_dir()
>>                           fs/sysfs/dir.c:sysfs_create_dir()
>>
>>
>> And that last call is where the EEXIST gripe comes from.  I can't tell
>> why exactly it's trying to recreate the i2c-* directory node in sysfs
>> again.  (Maybe it's iterating over the parent node for some reason?)
>>
>>
>> If you've waited a long time to open the dvb frontend, the driver load
>> should have already created the i2c-* directory node, and it should
>> exist.  There doesn't seem to be any duplicate checking until the sysfs
>> directory node is attempted to be created again.  I don't know if the
>> call to request_firmware() in xc5000_fw_upload() is passing in the right
>> "dev" structure (&priv->i2c_props.adap->dev) or not.  The parent of the
>> i2c bus adapter dev is the pci bus dev.  Request firmware does end up
>> copying the bus_id from the parent i2c adapter dev to make sure it gets
>> installed in the right place under sysfs.  I just can't see what's going
>> wrong, aside from everything is happening as it should: and that
>> logically leads to the error.
>>
>>
>> The source code I'm looking at comes from this system:
>>
>> $ uname -a
>> Linux morgan.walls.org 2.6.25.10-86.fc9.x86_64 #1 SMP Mon Jul 7 20:23:46 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux
>>
>>
>> Steve or Mike,
>>
>> Any ideas?
>>
>>
>> Regards,
>> Andy
>>
>>
>>>>>> 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
>>>
>>>
>>> _______________________________________________
>>> linux-dvb mailing list
>>> linux-dvb at linuxtv.org
>>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>>>
>>
> 
> don't load i2c-dev
> 
> Markus
> 

Good call, that was it.  Re-compiling my kenrel without I2C_DEV allowed 
the firmware to load and dvbscan to work as expected.

Thanks,
...Patrick



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