Subject: [Bug 199471] [Bisected][Regression] windfarm_pm* no longer gets automatically loaded when CONFIG_I2C_POWERMAC=y is set

From: [email-masked]
Date: Thu, 23 Apr 2020 01:21:10 +0000

https://bugzilla.kernel.org/show_bug.cgi?id=199471

--- Comment #20 from Dennis Clarke ([email-masked]) ---

Possibly unrelated but there appears to be a small memory leak within
windfarm_* somewhere given that I see traffic in kmemleak :

enceladus# 
enceladus# uname -a 
Linux enceladus 5.7.0-rc2 #1 SMP Tue Apr 21 23:32:43 UTC 2020 ppc64 GNU/Linux

enceladus# lsmod | grep 'farm' 
windfarm_cpufreq_clamp     4640  1
windfarm_smu_sensors     9548  1
windfarm_smu_controls     9078  8
windfarm_pm112         15935  0
windfarm_pid            4378  1 windfarm_pm112
windfarm_smu_sat        9802  9 windfarm_pm112
windfarm_max6690_sensor     5434  1
windfarm_lm75_sensor     6148  1
windfarm_core          16619  7
windfarm_cpufreq_clamp,windfarm_smu_controls,windfarm_max6690_sensor,windfarm_smu_sat,windfarm_smu_sensors,windfarm_lm75_sensor,windfarm_pm112
enceladus# 

enceladus# cat /sys/kernel/debug/kmemleak
unreferenced object 0xc00000000867a6a0 (size 32):
  comm "kwindfarm", pid 175, jiffies 4294894706 (age 1843.540s)
  hex dump (first 32 bytes):
    c8 06 02 7f ff 02 ff 01 fb bf 00 59 00 20 00 00  ...........Y. ..
    00 07 89 37 00 a0 00 00 6b 6b 6b 6b 6b 6b 6b a5  ...7....kkkkkkk.
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<00000000e6cc23fc>] .pm112_wf_notify+0x624/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000002612a15a0 (size 16):
  comm "kwindfarm", pid 175, jiffies 4294894926 (age 1842.660s)
  hex dump (first 16 bytes):
    c4 04 01 7f a0 12 20 5f ff 55 b8 14 7b 12 00 00  ...... _.U..{...
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<0000000050e586af>] .pm112_wf_notify+0x66c/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc00000000867ba20 (size 32):
  comm "kwindfarm", pid 175, jiffies 4294895089 (age 1842.008s)
  hex dump (first 32 bytes):
    c9 06 02 7f ff 02 ff 01 fb bf 00 59 00 20 00 00  ...........Y. ..
    00 07 89 37 00 a0 00 00 6b 6b 6b 6b 6b 6b 6b a5  ...7....kkkkkkk.
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<00000000e6cc23fc>] .pm112_wf_notify+0x624/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000000061a8740 (size 16):
  comm "kwindfarm", pid 175, jiffies 4294895309 (age 1841.128s)
  hex dump (first 16 bytes):
    c5 04 01 7f a0 12 20 5f ff 55 29 14 7b 12 00 00  ...... _.U).{...
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<0000000050e586af>] .pm112_wf_notify+0x66c/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000000061ab6e0 (size 32):
  comm "kwindfarm", pid 175, jiffies 4294895473 (age 1840.472s)
  hex dump (first 32 bytes):
    c8 06 02 7f ff 02 ff 01 fb bf 00 59 00 20 00 00  ...........Y. ..
    00 07 89 37 00 a0 00 00 6b 6b 6b 6b 6b 6b 6b a5  ...7....kkkkkkk.
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<00000000e6cc23fc>] .pm112_wf_notify+0x624/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000000061a8b90 (size 16):
  comm "kwindfarm", pid 175, jiffies 4294895693 (age 1839.600s)
  hex dump (first 16 bytes):
    c4 04 01 7f a0 12 20 5f ff 55 b8 14 7b 12 00 00  ...... _.U..{...
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<0000000050e586af>] .pm112_wf_notify+0x66c/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000000061aa9e0 (size 32):
  comm "kwindfarm", pid 175, jiffies 4294895857 (age 1838.944s)
  hex dump (first 32 bytes):
    c9 06 02 7f ff 02 ff 01 fb bf 00 59 00 20 00 00  ...........Y. ..
    00 07 89 37 00 a0 00 00 6b 6b 6b 6b 6b 6b 6b a5  ...7....kkkkkkk.
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<00000000e6cc23fc>] .pm112_wf_notify+0x624/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc00000025aacd2c0 (size 16):
  comm "kwindfarm", pid 175, jiffies 4294896076 (age 1838.068s)
  hex dump (first 16 bytes):
    c5 04 01 7f a0 12 20 5f ff 55 d7 15 7b 12 00 00  ...... _.U..{...
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<0000000050e586af>] .pm112_wf_notify+0x66c/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
enceladus# 
enceladus# cat /sys/kernel/debug/kmemleak
unreferenced object 0xc00000000867a6a0 (size 32):
  comm "kwindfarm", pid 175, jiffies 4294894706 (age 4736.636s)
  hex dump (first 32 bytes):
    c8 06 02 7f ff 02 ff 01 fb bf 00 59 00 20 00 00  ...........Y. ..
    00 07 89 37 00 a0 00 00 6b 6b 6b 6b 6b 6b 6b a5  ...7....kkkkkkk.
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<00000000e6cc23fc>] .pm112_wf_notify+0x624/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000002612a15a0 (size 16):
  comm "kwindfarm", pid 175, jiffies 4294894926 (age 4735.756s)
  hex dump (first 16 bytes):
    c4 04 01 7f a0 12 20 5f ff 55 b8 14 7b 12 00 00  ...... _.U..{...
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<0000000050e586af>] .pm112_wf_notify+0x66c/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc00000000867ba20 (size 32):
  comm "kwindfarm", pid 175, jiffies 4294895089 (age 4735.104s)
  hex dump (first 32 bytes):
    c9 06 02 7f ff 02 ff 01 fb bf 00 59 00 20 00 00  ...........Y. ..
    00 07 89 37 00 a0 00 00 6b 6b 6b 6b 6b 6b 6b a5  ...7....kkkkkkk.
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<00000000e6cc23fc>] .pm112_wf_notify+0x624/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000000061a8740 (size 16):
  comm "kwindfarm", pid 175, jiffies 4294895309 (age 4734.224s)
  hex dump (first 16 bytes):
    c5 04 01 7f a0 12 20 5f ff 55 29 14 7b 12 00 00  ...... _.U).{...
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<0000000050e586af>] .pm112_wf_notify+0x66c/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000000061ab6e0 (size 32):
  comm "kwindfarm", pid 175, jiffies 4294895473 (age 4733.568s)
  hex dump (first 32 bytes):
    c8 06 02 7f ff 02 ff 01 fb bf 00 59 00 20 00 00  ...........Y. ..
    00 07 89 37 00 a0 00 00 6b 6b 6b 6b 6b 6b 6b a5  ...7....kkkkkkk.
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<00000000e6cc23fc>] .pm112_wf_notify+0x624/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000000061a8b90 (size 16):
  comm "kwindfarm", pid 175, jiffies 4294895693 (age 4732.696s)
  hex dump (first 16 bytes):
    c4 04 01 7f a0 12 20 5f ff 55 b8 14 7b 12 00 00  ...... _.U..{...
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<0000000050e586af>] .pm112_wf_notify+0x66c/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc0000000061aa9e0 (size 32):
  comm "kwindfarm", pid 175, jiffies 4294895857 (age 4732.040s)
  hex dump (first 32 bytes):
    c9 06 02 7f ff 02 ff 01 fb bf 00 59 00 20 00 00  ...........Y. ..
    00 07 89 37 00 a0 00 00 6b 6b 6b 6b 6b 6b 6b a5  ...7....kkkkkkk.
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<00000000e6cc23fc>] .pm112_wf_notify+0x624/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
unreferenced object 0xc00000025aacd2c0 (size 16):
  comm "kwindfarm", pid 175, jiffies 4294896076 (age 4731.164s)
  hex dump (first 16 bytes):
    c5 04 01 7f a0 12 20 5f ff 55 d7 15 7b 12 00 00  ...... _.U..{...
  backtrace:
    [<00000000fce2b937>] .smu_sat_get_sdb_partition+0x150/0x2f0
[windfarm_smu_sat]
    [<0000000050e586af>] .pm112_wf_notify+0x66c/0x1460 [windfarm_pm112]
    [<000000008cdab940>] .notifier_call_chain+0x88/0xf0
    [<000000008f026422>] .__blocking_notifier_call_chain+0x6c/0xc0
    [<0000000045480c67>] .wf_thread_func+0xe4/0x1e0 [windfarm_core]
    [<0000000079c8bd6f>] .kthread+0x1b8/0x1d0
    [<0000000073e2b812>] .ret_from_kernel_thread+0x58/0x74
enceladus# 

I will take a look into it and see what I can see.

-- 
Dennis Clarke
RISC-V/SPARC/PPC/ARM/CISC
UNIX and Linux spoken
GreyBeard and suspenders optional

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