Message-ID: <4CD4187F.1030305@oracle.com>
Date:	Fri, 05 Nov 2010 07:45:19 -0700
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	Jean Delvare <khali@...ux-fr.org>
CC:	lkml <linux-kernel@...r.kernel.org>, lm-sensors@...sensors.org
Subject: Re: [lm-sensors] hwmon/adt7470 crash on module load (2.6.37-rc1)

On 11/05/10 01:42, Jean Delvare wrote:
> Hi Randy,
> 
> On Thu, 4 Nov 2010 17:09:29 -0700, Randy Dunlap wrote:
>> Nov  4 15:56:17 control kernel: [  173.105754] calling  adt7470_init+0x0/0x27 [adt7470] @ 4392
>> Nov  4 15:56:18 [  173.113711] i2c-core: driver [adt7470] registered
>> control kernel: [  173.122202] i2c i2c-15: found normal entry for adapter 15, addr 0x2c
>> [  173.105754] c[  173.136181] i801_smbus 0000:00:1f.3: No response
>> [  173.142478] i2c i2c-15: found normal entry for adapter 15, addr 0x2e
>> Nov  4 15:56:18 [  173.151286] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC
> 
> Do you have a device at address 0x2e on this I2C adapter, or not?

AFAIK I don't even have an I2C adapter.  or is there one in the intel chipset?

> Are you using the adt7470 driver on this system normally, or did you
> build it in just for random testing purpose?

It's just random module testing.

>> [  173.156502] last sysfs file: /sys/module/hwmon/initstate
>> [  173.156502] CPU 1 
>> [  173.156502] Modules linked in: adt7470(+) ipt_MASQUERADE iptable_nat nf_nat af_packet nfsd lockd nfs_acl auth_rpcgss exportfs sco bridge stp llc bnep l2cap crc16 bluetooth rfkill sunrpc ipt_REJECT nf_conntrack_ipv4 nf_defrag_ipv4 iptable_filter ip_tables ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6 xt_state nf_conntrack ip6table_filter ip6_tables x_tables ipv6 p4_clockmod freq_table speedstep_lib binfmt_misc dm_mirror dm_region_hash dm_log dm_multipath scsi_dh dm_mod kvm uinput mousedev joydev ppdev snd_intel8x0 snd_ac97_codec ac97_bus snd_seq snd_seq_device snd_pcm usbkbd snd_timer led_class usbmouse usbhid hid iTCO_wdt snd dcdbas iTCO_vendor_support sg sr_mod pcspkr i2c_i801 soundcore rtc_cmos cdrom parport_pc rng_core snd_page_alloc rtc_core tg3 rtc_lib parport 8250_pnp evdev mac_hid shpchp pci_hotplug unix ide_pci_generic ide_core ata_generic pata_acpi ata_piix sd_mod crc_t10dif ext3 jbd mbcache uhci_hcd ohci_hcd ssb mmc_core pcmcia pcmcia_core firmware_cl
!
>  as!
>>  s ehci_hcd usbcore nls_base i915 drm_kms_helper intel_agp button intel_gtt video thermal_sys hwmon output [last unloaded: ltc4245]
>> [  173.156502] 
>> [  173.156502] Pid: 22, comm: kworker/1:1 Not tainted 2.6.37-rc1 #12 0HH807/OptiPlex GX620               
>> [  173.156502] RIP: 0010:[<ffffffff813ea532>]  [<ffffffff813ea532>] check_modem_status+0xe7/0x29c
> 
> Several drivers have a function named check_modem_status(), but adt7470 is
> not one of them. I'm curious how we can get there if the crash is in
> driver adt7470. Stack corruption maybe?
> 
>> [  173.308056] RSP: 0018:ffff88007c803e18  EFLAGS: 00010006
>> [  173.308056] RAX: 6b6b6b6b6b6b6b6b RBX: ffffffff82a55400 RCX: 0000000000000100
>> [  173.308056] RDX: 00000000260b260a RSI: 0000000000000028 RDI: 0000000000000006
>> [  173.308056] RBP: ffff88007c803e58 R08: 0000000000000006 R09: 395099858027a0e6
>>
>> <locked up tight here>
> 
> Can we see the kernel config you're running?

Sure, it's attached.  It's close to allmodconfig, with a few kconfig
options changed to =y instead of =m and some others (like debug and self-tests)
disabled.



-- 
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***

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