From mboxrd@z Thu Jan 1 00:00:00 1970 From: Meelis Roos Subject: i2c-i801 hangs indefinitely on IBM x3550 Date: Tue, 24 Sep 2013 14:46:30 +0300 (EEST) Message-ID: Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Linux Kernel list , linux-i2c@vger.kernel.org Cc: Jean Delvare , Wolfram Sang List-Id: linux-i2c@vger.kernel.org Tried latest Debian kernel (3.10-3-amd64) and latest upstream kernel (3.12-rc2) on a decommisioned IBM x3550 server. i2c-i801 is autoloaded but all access to it seems to wait forever, including stopping reboot from happening because modprobe is still running and blocked on this. 00:1f.3 SMBus: Intel Corporation 631xESB/632xESB/3100 Chipset SMBus Controller (rev 09) Subsystem: IBM Device 02dd Control: I/O+ Mem- BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr+ Stepping- SERR+ FastB2B- DisINTx+ Status: Cap- 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- SERR- /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 240.172186] modprobe D ffff88003cec83e0 0 267 1 0x00000006 [ 240.172336] ffff88003cec80c0 0000000000000086 0000000000012dc0 ffff88003baf1fd8 [ 240.172572] 0000000000012dc0 ffff88003baf1fd8 ffffffffa0029340 ffff88003baf1a48 [ 240.172808] ffffffffa0029344 ffff88003cec80c0 00000000ffffffff ffffffffa0029348 [ 240.173044] Call Trace: [ 240.173111] [] ? schedule_preempt_disabled+0x20/0x60 [ 240.173170] [] ? __mutex_lock_slowpath+0x133/0x1b0 [ 240.173234] [] ? i2c_register_adapter+0x390/0x390 [i2c_core] [ 240.173293] [] ? mutex_lock+0x16/0x30 [ 240.173350] [] ? i2c_add_adapter+0x11/0x60 [i2c_core] [ 240.173424] [] ? __i2c_bit_add_bus+0x1af/0x360 [i2c_algo_bit] [ 240.173567] [] ? radeon_i2c_create+0x194/0x2a0 [radeon] [ 240.173662] [] ? radeon_combios_i2c_init+0xb2/0x4e0 [radeon] [ 240.173774] [] ? radeon_modeset_init+0x1a8/0x990 [radeon] [ 240.173867] [] ? radeon_debugfs_add_files+0xac/0x100 [radeon] [ 240.173975] [] ? radeon_driver_load_kms+0xe0/0x160 [radeon] [ 240.174070] [] ? drm_get_pci_dev+0x11c/0x2d0 [drm] [ 240.174144] [] ? pci_device_probe+0x78/0xc0 [ 240.174217] [] ? driver_probe_device+0x68/0x220 [ 240.174288] [] ? __driver_attach+0x7b/0x80 [ 240.174359] [] ? __device_attach+0x40/0x40 [ 240.174429] [] ? bus_for_each_dev+0x53/0x90 [ 240.174500] [] ? bus_add_driver+0x1e8/0x290 [ 240.174570] [] ? driver_register+0x56/0xd0 [ 240.174644] [] ? 0xffffffffa0383fff [ 240.174715] [] ? do_one_initcall+0x102/0x150 [ 240.174788] [] ? load_module+0x1b64/0x2310 [ 240.174859] [] ? m_show+0x1c0/0x1c0 [ 240.174929] [] ? SyS_init_module+0x91/0xc0 [ 240.175000] [] ? system_call_fastpath+0x16/0x1b [ 240.175071] INFO: task modprobe:283 blocked for more than 120 seconds. [ 240.175142] Not tainted 3.12.0-rc2 #2 [ 240.175208] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 240.175294] modprobe D ffff88003daada90 0 283 1 0x00000004 [ 240.175455] ffff88003daad770 0000000000000086 0000000000012dc0 ffff88003d73bfd8 [ 240.175719] 0000000000012dc0 ffff88003d73bfd8 ffff88003ccb0c00 0000000000000000 [ 240.175982] ffff88003ccb0f90 ffff88003ccb0f70 ffff88003ccb0f80 0000000000000000 [ 240.176264] Call Trace: [ 240.176332] [] ? i801_transaction+0x9d/0x120 [i2c_i801] [ 240.176407] [] ? wake_up_atomic_t+0x30/0x30 [ 240.176479] [] ? i801_access+0x285/0xaa0 [i2c_i801] [ 240.176551] [] ? number.isra.1+0x31a/0x350 [ 240.176624] [] ? ep_poll_callback+0x10b/0x160 [ 240.176696] [] ? i2c_smbus_xfer+0xc3/0x160 [i2c_core] [ 240.176770] [] ? i2c_default_probe+0xe3/0x130 [i2c_core] [ 240.176843] [] ? device_for_each_child+0x52/0x60 [ 240.176916] [] ? i2c_do_add_adapter+0x1ab/0x290 [i2c_core] [ 240.176991] [] ? kobject_uevent_env+0x10a/0x4c0 [ 240.177064] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 240.177151] [] ? bus_for_each_dev+0x53/0x90 [ 240.177223] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 240.177311] [] ? i2c_for_each_dev+0x28/0x40 [i2c_core] [ 240.177385] [] ? i2c_register_driver+0x59/0xa0 [i2c_core] [ 240.177458] [] ? 0xffffffffa0004fff [ 240.177527] [] ? do_one_initcall+0x102/0x150 [ 240.177599] [] ? load_module+0x1b64/0x2310 [ 240.177670] [] ? m_show+0x1c0/0x1c0 [ 240.177740] [] ? SyS_init_module+0x91/0xc0 [ 240.177811] [] ? system_call_fastpath+0x16/0x1b [ 360.176013] INFO: task modprobe:267 blocked for more than 120 seconds. [ 360.176092] Not tainted 3.12.0-rc2 #2 [ 360.176158] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 360.176245] modprobe D ffff88003cec83e0 0 267 1 0x00000006 [ 360.176409] ffff88003cec80c0 0000000000000086 0000000000012dc0 ffff88003baf1fd8 [ 360.176673] 0000000000012dc0 ffff88003baf1fd8 ffffffffa0029340 ffff88003baf1a48 [ 360.176936] ffffffffa0029344 ffff88003cec80c0 00000000ffffffff ffffffffa0029348 [ 360.177200] Call Trace: [ 360.177282] [] ? schedule_preempt_disabled+0x20/0x60 [ 360.177354] [] ? __mutex_lock_slowpath+0x133/0x1b0 [ 360.177431] [] ? i2c_register_adapter+0x390/0x390 [i2c_core] [ 360.177518] [] ? mutex_lock+0x16/0x30 [ 360.177589] [] ? i2c_add_adapter+0x11/0x60 [i2c_core] [ 360.177663] [] ? __i2c_bit_add_bus+0x1af/0x360 [i2c_algo_bit] [ 360.177806] [] ? radeon_i2c_create+0x194/0x2a0 [radeon] [ 360.177901] [] ? radeon_combios_i2c_init+0xb2/0x4e0 [radeon] [ 360.178013] [] ? radeon_modeset_init+0x1a8/0x990 [radeon] [ 360.178106] [] ? radeon_debugfs_add_files+0xac/0x100 [radeon] [ 360.178214] [] ? radeon_driver_load_kms+0xe0/0x160 [radeon] [ 360.178309] [] ? drm_get_pci_dev+0x11c/0x2d0 [drm] [ 360.178383] [] ? pci_device_probe+0x78/0xc0 [ 360.178455] [] ? driver_probe_device+0x68/0x220 [ 360.178527] [] ? __driver_attach+0x7b/0x80 [ 360.178597] [] ? __device_attach+0x40/0x40 [ 360.178668] [] ? bus_for_each_dev+0x53/0x90 [ 360.178738] [] ? bus_add_driver+0x1e8/0x290 [ 360.178810] [] ? driver_register+0x56/0xd0 [ 360.178883] [] ? 0xffffffffa0383fff [ 360.178953] [] ? do_one_initcall+0x102/0x150 [ 360.179027] [] ? load_module+0x1b64/0x2310 [ 360.179098] [] ? m_show+0x1c0/0x1c0 [ 360.179168] [] ? SyS_init_module+0x91/0xc0 [ 360.179240] [] ? system_call_fastpath+0x16/0x1b [ 360.179311] INFO: task modprobe:283 blocked for more than 120 seconds. [ 360.179382] Not tainted 3.12.0-rc2 #2 [ 360.179448] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 360.179534] modprobe D ffff88003daada90 0 283 1 0x00000004 [ 360.179695] ffff88003daad770 0000000000000086 0000000000012dc0 ffff88003d73bfd8 [ 360.179959] 0000000000012dc0 ffff88003d73bfd8 ffff88003ccb0c00 0000000000000000 [ 360.180239] ffff88003ccb0f90 ffff88003ccb0f70 ffff88003ccb0f80 0000000000000000 [ 360.180503] Call Trace: [ 360.180570] [] ? i801_transaction+0x9d/0x120 [i2c_i801] [ 360.180644] [] ? wake_up_atomic_t+0x30/0x30 [ 360.180716] [] ? i801_access+0x285/0xaa0 [i2c_i801] [ 360.180789] [] ? number.isra.1+0x31a/0x350 [ 360.180862] [] ? ep_poll_callback+0x10b/0x160 [ 360.180934] [] ? i2c_smbus_xfer+0xc3/0x160 [i2c_core] [ 360.181008] [] ? i2c_default_probe+0xe3/0x130 [i2c_core] [ 360.181081] [] ? device_for_each_child+0x52/0x60 [ 360.181154] [] ? i2c_do_add_adapter+0x1ab/0x290 [i2c_core] [ 360.181229] [] ? kobject_uevent_env+0x10a/0x4c0 [ 360.181302] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 360.181389] [] ? bus_for_each_dev+0x53/0x90 [ 360.181461] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 360.181549] [] ? i2c_for_each_dev+0x28/0x40 [i2c_core] [ 360.181623] [] ? i2c_register_driver+0x59/0xa0 [i2c_core] [ 360.181696] [] ? 0xffffffffa0004fff [ 360.181765] [] ? do_one_initcall+0x102/0x150 [ 360.181837] [] ? load_module+0x1b64/0x2310 [ 360.181907] [] ? m_show+0x1c0/0x1c0 [ 360.181978] [] ? SyS_init_module+0x91/0xc0 [ 360.182049] [] ? system_call_fastpath+0x16/0x1b [ 480.180015] INFO: task modprobe:267 blocked for more than 120 seconds. [ 480.180094] Not tainted 3.12.0-rc2 #2 [ 480.180161] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 480.181816] modprobe D ffff88003cec83e0 0 267 1 0x00000006 [ 480.181979] ffff88003cec80c0 0000000000000086 0000000000012dc0 ffff88003baf1fd8 [ 480.182242] 0000000000012dc0 ffff88003baf1fd8 ffffffffa0029340 ffff88003baf1a48 [ 480.182506] ffffffffa0029344 ffff88003cec80c0 00000000ffffffff ffffffffa0029348 [ 480.182770] Call Trace: [ 480.182851] [] ? schedule_preempt_disabled+0x20/0x60 [ 480.182924] [] ? __mutex_lock_slowpath+0x133/0x1b0 [ 480.183001] [] ? i2c_register_adapter+0x390/0x390 [i2c_core] [ 480.183087] [] ? mutex_lock+0x16/0x30 [ 480.183159] [] ? i2c_add_adapter+0x11/0x60 [i2c_core] [ 480.183232] [] ? __i2c_bit_add_bus+0x1af/0x360 [i2c_algo_bit] [ 480.183371] [] ? radeon_i2c_create+0x194/0x2a0 [radeon] [ 480.183466] [] ? radeon_combios_i2c_init+0xb2/0x4e0 [radeon] [ 480.183578] [] ? radeon_modeset_init+0x1a8/0x990 [radeon] [ 480.183671] [] ? radeon_debugfs_add_files+0xac/0x100 [radeon] [ 480.183779] [] ? radeon_driver_load_kms+0xe0/0x160 [radeon] [ 480.183873] [] ? drm_get_pci_dev+0x11c/0x2d0 [drm] [ 480.183947] [] ? pci_device_probe+0x78/0xc0 [ 480.184030] [] ? driver_probe_device+0x68/0x220 [ 480.184107] [] ? __driver_attach+0x7b/0x80 [ 480.184180] [] ? __device_attach+0x40/0x40 [ 480.184254] [] ? bus_for_each_dev+0x53/0x90 [ 480.184326] [] ? bus_add_driver+0x1e8/0x290 [ 480.184397] [] ? driver_register+0x56/0xd0 [ 480.184470] [] ? 0xffffffffa0383fff [ 480.184541] [] ? do_one_initcall+0x102/0x150 [ 480.184614] [] ? load_module+0x1b64/0x2310 [ 480.184685] [] ? m_show+0x1c0/0x1c0 [ 480.184755] [] ? SyS_init_module+0x91/0xc0 [ 480.184826] [] ? system_call_fastpath+0x16/0x1b [ 480.184898] INFO: task modprobe:283 blocked for more than 120 seconds. [ 480.184969] Not tainted 3.12.0-rc2 #2 [ 480.185035] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 480.185121] modprobe D ffff88003daada90 0 283 1 0x00000004 [ 480.185282] ffff88003daad770 0000000000000086 0000000000012dc0 ffff88003d73bfd8 [ 480.185546] 0000000000012dc0 ffff88003d73bfd8 ffff88003ccb0c00 0000000000000000 [ 480.185809] ffff88003ccb0f90 ffff88003ccb0f70 ffff88003ccb0f80 0000000000000000 [ 480.186073] Call Trace: [ 480.186139] [] ? i801_transaction+0x9d/0x120 [i2c_i801] [ 480.186213] [] ? wake_up_atomic_t+0x30/0x30 [ 480.186284] [] ? i801_access+0x285/0xaa0 [i2c_i801] [ 480.186357] [] ? number.isra.1+0x31a/0x350 [ 480.186430] [] ? ep_poll_callback+0x10b/0x160 [ 480.186502] [] ? i2c_smbus_xfer+0xc3/0x160 [i2c_core] [ 480.186576] [] ? i2c_default_probe+0xe3/0x130 [i2c_core] [ 480.186649] [] ? device_for_each_child+0x52/0x60 [ 480.186722] [] ? i2c_do_add_adapter+0x1ab/0x290 [i2c_core] [ 480.186798] [] ? kobject_uevent_env+0x10a/0x4c0 [ 480.186871] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 480.186958] [] ? bus_for_each_dev+0x53/0x90 [ 480.187030] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 480.187118] [] ? i2c_for_each_dev+0x28/0x40 [i2c_core] [ 480.187192] [] ? i2c_register_driver+0x59/0xa0 [i2c_core] [ 480.187265] [] ? 0xffffffffa0004fff [ 480.187334] [] ? do_one_initcall+0x102/0x150 [ 480.187406] [] ? load_module+0x1b64/0x2310 [ 480.187476] [] ? m_show+0x1c0/0x1c0 [ 480.187547] [] ? SyS_init_module+0x91/0xc0 [ 480.187618] [] ? system_call_fastpath+0x16/0x1b [ 600.184009] INFO: task modprobe:267 blocked for more than 120 seconds. [ 600.184081] Not tainted 3.12.0-rc2 #2 [ 600.184147] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.184234] modprobe D ffff88003cec83e0 0 267 1 0x00000006 [ 600.184395] ffff88003cec80c0 0000000000000086 0000000000012dc0 ffff88003baf1fd8 [ 600.184659] 0000000000012dc0 ffff88003baf1fd8 ffffffffa0029340 ffff88003baf1a48 [ 600.184922] ffffffffa0029344 ffff88003cec80c0 00000000ffffffff ffffffffa0029348 [ 600.185186] Call Trace: [ 600.185256] [] ? schedule_preempt_disabled+0x20/0x60 [ 600.185328] [] ? __mutex_lock_slowpath+0x133/0x1b0 [ 600.185402] [] ? i2c_register_adapter+0x390/0x390 [i2c_core] [ 600.185489] [] ? mutex_lock+0x16/0x30 [ 600.185560] [] ? i2c_add_adapter+0x11/0x60 [i2c_core] [ 600.185633] [] ? __i2c_bit_add_bus+0x1af/0x360 [i2c_algo_bit] [ 600.185749] [] ? radeon_i2c_create+0x194/0x2a0 [radeon] [ 600.185844] [] ? radeon_combios_i2c_init+0xb2/0x4e0 [radeon] [ 600.185955] [] ? radeon_modeset_init+0x1a8/0x990 [radeon] [ 600.186047] [] ? radeon_debugfs_add_files+0xac/0x100 [radeon] [ 600.186155] [] ? radeon_driver_load_kms+0xe0/0x160 [radeon] [ 600.186247] [] ? drm_get_pci_dev+0x11c/0x2d0 [drm] [ 600.186319] [] ? pci_device_probe+0x78/0xc0 [ 600.186390] [] ? driver_probe_device+0x68/0x220 [ 600.186462] [] ? __driver_attach+0x7b/0x80 [ 600.186532] [] ? __device_attach+0x40/0x40 [ 600.186602] [] ? bus_for_each_dev+0x53/0x90 [ 600.186673] [] ? bus_add_driver+0x1e8/0x290 [ 600.186744] [] ? driver_register+0x56/0xd0 [ 600.186815] [] ? 0xffffffffa0383fff [ 600.186884] [] ? do_one_initcall+0x102/0x150 [ 600.186956] [] ? load_module+0x1b64/0x2310 [ 600.187026] [] ? m_show+0x1c0/0x1c0 [ 600.187096] [] ? SyS_init_module+0x91/0xc0 [ 600.187168] [] ? system_call_fastpath+0x16/0x1b [ 600.187238] INFO: task modprobe:283 blocked for more than 120 seconds. [ 600.187309] Not tainted 3.12.0-rc2 #2 [ 600.187375] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 600.187461] modprobe D ffff88003daada90 0 283 1 0x00000004 [ 600.187622] ffff88003daad770 0000000000000086 0000000000012dc0 ffff88003d73bfd8 [ 600.187885] 0000000000012dc0 ffff88003d73bfd8 ffff88003ccb0c00 0000000000000000 [ 600.188158] ffff88003ccb0f90 ffff88003ccb0f70 ffff88003ccb0f80 0000000000000000 [ 600.188423] Call Trace: [ 600.188490] [] ? i801_transaction+0x9d/0x120 [i2c_i801] [ 600.188562] [] ? wake_up_atomic_t+0x30/0x30 [ 600.188634] [] ? i801_access+0x285/0xaa0 [i2c_i801] [ 600.188706] [] ? number.isra.1+0x31a/0x350 [ 600.188776] [] ? ep_poll_callback+0x10b/0x160 [ 600.188849] [] ? i2c_smbus_xfer+0xc3/0x160 [i2c_core] [ 600.188922] [] ? i2c_default_probe+0xe3/0x130 [i2c_core] [ 600.188995] [] ? device_for_each_child+0x52/0x60 [ 600.189068] [] ? i2c_do_add_adapter+0x1ab/0x290 [i2c_core] [ 600.189142] [] ? kobject_uevent_env+0x10a/0x4c0 [ 600.189214] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 600.189301] [] ? bus_for_each_dev+0x53/0x90 [ 600.189374] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 600.189462] [] ? i2c_for_each_dev+0x28/0x40 [i2c_core] [ 600.189536] [] ? i2c_register_driver+0x59/0xa0 [i2c_core] [ 600.189608] [] ? 0xffffffffa0004fff [ 600.189678] [] ? do_one_initcall+0x102/0x150 [ 600.189750] [] ? load_module+0x1b64/0x2310 [ 600.189820] [] ? m_show+0x1c0/0x1c0 [ 600.189891] [] ? SyS_init_module+0x91/0xc0 [ 600.189961] [] ? system_call_fastpath+0x16/0x1b [ 629.274318] systemd-udevd[6677]: starting version 204 [ 720.188014] INFO: task modprobe:267 blocked for more than 120 seconds. [ 720.188092] Not tainted 3.12.0-rc2 #2 [ 720.188158] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 720.188245] modprobe D ffff88003cec83e0 0 267 1 0x00000006 [ 720.188408] ffff88003cec80c0 0000000000000086 0000000000012dc0 ffff88003baf1fd8 [ 720.188672] 0000000000012dc0 ffff88003baf1fd8 ffffffffa0029340 ffff88003baf1a48 [ 720.188936] ffffffffa0029344 ffff88003cec80c0 00000000ffffffff ffffffffa0029348 [ 720.189200] Call Trace: [ 720.189282] [] ? schedule_preempt_disabled+0x20/0x60 [ 720.189354] [] ? __mutex_lock_slowpath+0x133/0x1b0 [ 720.189431] [] ? i2c_register_adapter+0x390/0x390 [i2c_core] [ 720.189518] [] ? mutex_lock+0x16/0x30 [ 720.189589] [] ? i2c_add_adapter+0x11/0x60 [i2c_core] [ 720.189663] [] ? __i2c_bit_add_bus+0x1af/0x360 [i2c_algo_bit] [ 720.189807] [] ? radeon_i2c_create+0x194/0x2a0 [radeon] [ 720.189903] [] ? radeon_combios_i2c_init+0xb2/0x4e0 [radeon] [ 720.190015] [] ? radeon_modeset_init+0x1a8/0x990 [radeon] [ 720.190108] [] ? radeon_debugfs_add_files+0xac/0x100 [radeon] [ 720.190215] [] ? radeon_driver_load_kms+0xe0/0x160 [radeon] [ 720.190311] [] ? drm_get_pci_dev+0x11c/0x2d0 [drm] [ 720.191953] [] ? pci_device_probe+0x78/0xc0 [ 720.192036] [] ? driver_probe_device+0x68/0x220 [ 720.192113] [] ? __driver_attach+0x7b/0x80 [ 720.192187] [] ? __device_attach+0x40/0x40 [ 720.192260] [] ? bus_for_each_dev+0x53/0x90 [ 720.192333] [] ? bus_add_driver+0x1e8/0x290 [ 720.192404] [] ? driver_register+0x56/0xd0 [ 720.192478] [] ? 0xffffffffa0383fff [ 720.192548] [] ? do_one_initcall+0x102/0x150 [ 720.192622] [] ? load_module+0x1b64/0x2310 [ 720.192692] [] ? m_show+0x1c0/0x1c0 [ 720.192763] [] ? SyS_init_module+0x91/0xc0 [ 720.192834] [] ? system_call_fastpath+0x16/0x1b [ 720.192906] INFO: task modprobe:283 blocked for more than 120 seconds. [ 720.192977] Not tainted 3.12.0-rc2 #2 [ 720.193043] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 720.193129] modprobe D ffff88003daada90 0 283 1 0x00000004 [ 720.193291] ffff88003daad770 0000000000000086 0000000000012dc0 ffff88003d73bfd8 [ 720.193554] 0000000000012dc0 ffff88003d73bfd8 ffff88003ccb0c00 0000000000000000 [ 720.193818] ffff88003ccb0f90 ffff88003ccb0f70 ffff88003ccb0f80 0000000000000000 [ 720.194081] Call Trace: [ 720.194148] [] ? i801_transaction+0x9d/0x120 [i2c_i801] [ 720.194221] [] ? wake_up_atomic_t+0x30/0x30 [ 720.194293] [] ? i801_access+0x285/0xaa0 [i2c_i801] [ 720.194366] [] ? number.isra.1+0x31a/0x350 [ 720.194439] [] ? ep_poll_callback+0x10b/0x160 [ 720.194511] [] ? i2c_smbus_xfer+0xc3/0x160 [i2c_core] [ 720.194585] [] ? i2c_default_probe+0xe3/0x130 [i2c_core] [ 720.194658] [] ? device_for_each_child+0x52/0x60 [ 720.194731] [] ? i2c_do_add_adapter+0x1ab/0x290 [i2c_core] [ 720.194806] [] ? kobject_uevent_env+0x10a/0x4c0 [ 720.194879] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 720.194966] [] ? bus_for_each_dev+0x53/0x90 [ 720.195038] [] ? __process_new_adapter+0x10/0x10 [i2c_core] [ 720.195126] [] ? i2c_for_each_dev+0x28/0x40 [i2c_core] [ 720.195200] [] ? i2c_register_driver+0x59/0xa0 [i2c_core] [ 720.195273] [] ? 0xffffffffa0004fff [ 720.195342] [] ? do_one_initcall+0x102/0x150 [ 720.195414] [] ? load_module+0x1b64/0x2310 [ 720.195485] [] ? m_show+0x1c0/0x1c0 [ 720.195555] [] ? SyS_init_module+0x91/0xc0 [ 720.195626] [] ? system_call_fastpath+0x16/0x1b [ 790.695879] i2c /dev entries driver -- Meelis Roos (mroos@linux.ee)