2.6.26 crash loading firmware in tuner_xc2028.ko

[Robert Lowery]

Folks,

For many months, I've been using the v4l-dvb experimental tree to get my
DVICO Dual Digital 4 DVB card working with mythtv.  Since support for this
card has been merged as of 2.6.25 in tuner_xc2028.ko, I decided to give it
spin (via the Ubuntu Intrepid 2.6.26-4 package).

Unfortunately I'm now getting an Oops (below) on load of the firmware
available at
http://www.itee.uq.edu.au/~chrisp/Linux-DVB/DVICO/xc3028-dvico-au-01.fw.

I'm probably missing something obvious, but I can't spot any issues in
load_all_firmwares() or release_firmware()

Suggestions appreciated, Thanks for your help

-Rob

[  103.974543] xc2028 1-0061: Loading 3 firmware images from
xc3028-dvico-au-01.fw, type: DViCO DualDig4/Nano2 (Australia), ver 2.7
[  103.984657] BUG: unable to handle kernel NULL pointer dereference at
00000000
[  103.984690] IP: [<c0361a85>] _mutex_lock_interruptible_slowpath+0x35/0xe0
[  103.984716] *pde = 00000000
[  103.984731] Oops: 0002 [#1] SMP
[  103.984742] Modules linked in: nfsd auth_rpcgss exportfs speedstep_lib
cpufreq_conservative cpufreq_powersave cpufreq_userspace cpufreq_ondemand
cpufreq_stats freq_table container video output sbs sbshc battery nfs
lockd nfs_acl sunrpc iptable_filter ip_tables x_tables xfs ac lp
tuner_xc2028 zl10353 dvb_usb_cxusb dvb_usb snd_maestro3 dvb_core
snd_ac97_codec serio_raw ac97_bus snd_seq_dummy psmouse snd_seq_oss
snd_seq_midi snd_pcsp snd_rawmidi snd_pcm_oss snd_mixer_oss snd_pcm
snd_seq_midi_event snd_seq snd_page_alloc snd_timer snd_seq_device
sndbutto
n i2c_viapro soundcore i2c_core shpchp pci_hotplug via686a via_agp
parport_pc parport agpgart ipv6 evdev ext3 jbd mbcache sg sr_mod cdrom
sd_mod pata_acpi floppy pata_sil680 sym53c8xx ehci_hcd e100 uhci_hcd
pata_via ata_generic mii usbcore scsi_transport_spi libata scsi_mod dock
thermal processor fan fbcon tileblit font bitblit softcursor uvesafb cn
fuse
[  103.984962]
[  103.984971] Pid: 6492, comm: kdvb-fe-0 Not tainted (2.6.26-4-generic #1)
[  103.984981] EIP: 0060:[<c0361a85>] EFLAGS: 00010246 CPU: 1
[  103.984998] EIP is at __mutex_lock_interruptible_slowpath+0x35/0xe0
[  103.985009] EAX: f6783d30 EBX: f7aa0c5c ECX: f7aa0c64 EDX: 00000000
[  103.985020] ESI: f670d400 EDI: f7aa0c60 EBP: f6783d90 ESP: f6783d2c
[  103.985031]  DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068
[  103.985040] Process kdvb-fe-0 (pid: 6492, ti=f6782000 task=f670d400
task.ti=f6782000)
[  103.985050] Stack: f7aa0c64 f7aa0c64 00000000 c029e80f f6783d90
00000003 f7aa0720 f6783d90
[  103.985074]        f8b43b79 f6755d55 00000030 f8cbbaa5 f8cbdb14
0001d729 f7aa0c5c 00000061
[  103.985094]        f6783d90 f6783dcf f6783d93 f6783db8 f8b84251
f6783dcf 00000001 00000000
[  103.985114] Call Trace:
[  103.985129]  [<c029e80f>] release_firmware+0xf/0x20
[  103.985165]  [<f8b43b79>] dvb_usb_generic_rw+0x69/0x190 [dvb_usb]
[  103.985202]  [<f8cbbaa5>] load_all_firmwares+0x415/0x740 [tuner_xc2028]
[  103.985244]  [<f8b84251>] cxusb_ctrl_msg+0xa1/0xd0 [dvb_usb_cxusb]
[  103.985296]  [<f8b84737>] cxusb_bluebird_gpio_rw+0x37/0x50 [dvb_usb_cxusb]
[  103.985321]  [<f8b852a6>] cxusb_bluebird_gpio_pulse+0x56/0x70
[dvb_usb_cxusb]
[  103.985347]  [<f8b85443>] dvico_bluebird_xc2028_callback+0x13/0x30
[dvb_usb_cxusb]
[  103.985363]  [<f8cbc058>] check_firmware+0x288/0x880 [tuner_xc2028]
[  103.985389]  [<f8b84251>] cxusb_ctrl_msg+0xa1/0xd0 [dvb_usb_cxusb]
[  103.985440]  [<f8b8449f>] cxusb_i2c_xfer+0x21f/0x3c0 [dvb_usb_cxusb]
[  103.985463]  [<f8cbc6b6>] generic_set_freq+0x66/0x500 [tuner_xc2028]
[  103.985495]  [<c01049c7>] common_interrupt+0x23/0x28
[  103.985526]  [<f89f439f>] i2c_transfer+0x6f/0xa0 [i2c_core]
[  103.985572]  [<f8cbce64>] xc2028_set_params+0xf4/0x230 [tuner_xc2028]
[  103.985604]  [<f8b06c95>] zl10353_set_parameters+0x505/0x660 [zl10353]
[  103.985634]  [<c03610c4>] schedule+0x284/0x520
[  103.985698]  [<f8b745b1>] dvb_frontend_swzigzag_autotune+0xc1/0x240
[dvb_core]
[  103.985769]  [<c01353b0>] process_timeout+0x0/0x10
[  103.985806]  [<f8b74cd9>] dvb_frontend_swzigzag+0x179/0x270 [dvb_core]
[  103.985837]  [<f8b755af>] dvb_frontend_thread+0x38f/0x430 [dvb_core]
[  103.985862]  [<c011d783>] __wake_up_common+0x43/0x70
[  103.985894]  [<c013fe00>] autoremove_wake_function+0x0/0x50
[  103.985925]  [<f8b75220>] dvb_frontend_thread+0x0/0x430 [dvb_core]
[  103.985941]  [<c013faf9>] kthread+0x39/0x70
[  103.985941]  [<c013fac0>] kthread+0x0/0x70
[  103.985941]  [<c0104bd3>] kernel_thread_helper+0x7/0x14
[  103.985941]  =======================
[  103.985941] Code: ec 10 89 f8 64 8b 35 00 80 4d c0 e8 16 0e 00 00 8d 43
08 89
 04 24 8d 44 24 04 8b 53 0c 89 43 0c 8b 0c 24 89 54 24 08 89 4c 24 04 <89>
02 ba
 ff ff ff ff 89 74 24 0c 89 d0 87 03 83 e8 01 74 5f 87
[  103.985941] EIP:
[<c0361a85>]__mutex_lock_interruptible_slowpath+0x35/0xe0 SS:ESP
0068:f6783d2c
[  103.985941] ---[ end trace 9e886fbc373acdcc ]---


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