WARNING: at drivers/opp/core.c:678 dev_pm_opp_set_rate+0x4cc/0x5d4 - on arm x15

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While boot testing arm x15 devices the Kernel warning noticed with linux next
tag 20200825.

BAD:  next-20200825
GOOD:  next-20200824

metadata:
  git branch: master
  git repo: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
  git commit: 3a00d3dfd4b68b208ecd5405e676d06c8ad6bb63
  git describe: next-20200825
  make_kernelversion: 5.9.0-rc2
  kernel-config:
https://builds.tuxbuild.com/LDTu4GFMmvkJspza5LJIjQ/kernel.config

We are working on git bisect and boot testing on x15 and get back to you.

warning log:
-----------------
[   13.330201] sdhci-pltfm: SDHCI platform and OF driver helper
[   13.352903] omap_gpio 4805d000.gpio: Could not set line 27 debounce
to 200000 microseconds (-22)
[   13.361767] sdhci-omap 4809c000.mmc: Got CD GPIO
[   13.366885] sdhci-omap 4809c000.mmc: supply vqmmc not found, using
dummy regulator
[   13.374716] ------------[ cut here ]------------
[   13.379414] WARNING: CPU: 0 PID: 21 at drivers/opp/core.c:678
dev_pm_opp_set_rate+0x4cc/0x5d4
[   13.387999] Modules linked in:
[   13.391089] CPU: 0 PID: 21 Comm: kworker/0:1 Not tainted
5.9.0-rc2-next-20200825 #1
[   13.398779] Hardware name: Generic DRA74X (Flattened Device Tree)
[   13.404908] Workqueue: events dbs_work_handler
[   13.409378] Backtrace:
[   13.411852] [<c040e860>] (dump_backtrace) from [<c040ebd4>]
(show_stack+0x20/0x24)
[   13.419460]  r7:c20cca94 r6:00000000 r5:60000013 r4:c20cca94
[   13.425153] [<c040ebb4>] (show_stack) from [<c0941338>]
(dump_stack+0xec/0x118)
[   13.432505] [<c094124c>] (dump_stack) from [<c0451530>] (__warn+0xe8/0x100)
[   13.439501]  r10:e8b50600 r9:00000009 r8:c105f6f4 r7:000002a6
r6:c105f6f4 r5:00000009
[   13.447369]  r4:00000000 r3:c2004f30
[   13.450968] [<c0451448>] (__warn) from [<c04518fc>]
(warn_slowpath_fmt+0x74/0xc4)
[   13.458485]  r7:000002a6 r6:c1b42034 r5:00000000 r4:e9b50000
[   13.464174] [<c045188c>] (warn_slowpath_fmt) from [<c105f6f4>]
(dev_pm_opp_set_rate+0x4cc/0x5d4)
[   13.472999]  r9:e8b50280 r8:e9b50000 r7:ffffffea r6:3b9aca00
r5:59682f00 r4:e8902c00
[   13.480783] [<c105f228>] (dev_pm_opp_set_rate) from [<c106aa8c>]
(set_target+0x3c/0x64)
[   13.488824]  r10:00000002 r9:00000000 r8:c22b508c r7:c2227048
r6:0016e360 r5:00000000
[   13.496688]  r4:e8903000
[   13.499243] [<c106aa50>] (set_target) from [<c1064ca0>]
(__cpufreq_driver_target+0x2d0/0x628)
[   13.507808]  r7:c2227048 r6:e9b50000 r5:00000000 r4:e8903000
[   13.513499] [<c10649d0>] (__cpufreq_driver_target) from
[<c1069040>] (od_dbs_update+0x14c/0x170)
[   13.522327]  r10:c2204070 r9:e8b50880 r8:e8b50800 r7:e8b51440
r6:e8b50880 r5:e8b50800
[   13.530192]  r4:e8903000
[   13.532741] [<c1068ef4>] (od_dbs_update) from [<c1069d5c>]
(dbs_work_handler+0x3c/0x68)
[   13.540783]  r9:00000000 r8:c21d902c r7:e8903000 r6:e8b50804
r5:00000000 r4:e8b50838
[   13.548572] [<c1069d20>] (dbs_work_handler) from [<c046f204>]
(process_one_work+0x200/0x560)
[   13.557051]  r9:00000000 r8:00000000 r7:efc2c600 r6:efc29300
r5:e9b24500 r4:e8b50838
[   13.564833] [<c046f004>] (process_one_work) from [<c046f5b0>]
(worker_thread+0x4c/0x57c)
[   13.572963]  r10:efc29300 r9:00000008 r8:c2003d00 r7:efc29318
r6:e9b24514 r5:efc29300
[   13.580828]  r4:e9b24500
[   13.583381] [<c046f564>] (worker_thread) from [<c04773e0>]
(kthread+0x144/0x170)
[   13.590812]  r10:e9979e7c r9:e9b24500 r8:c046f564 r7:e9b50000
r6:00000000 r5:e9b25b80
[   13.598675]  r4:e99c0140
[   13.601228] [<c047729c>] (kthread) from [<c040024c>]
(ret_from_fork+0x14/0x28)
[   13.608484] Exception stack(0xe9b51fb0 to 0xe9b51ff8)
[   13.613559] 1fa0:                                     00000000
00000000 00000000 00000000
[   13.621777] 1fc0: 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
[   13.629994] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[   13.636642]  r10:00000000 r9:00000000 r8:00000000 r7:00000000
r6:00000000 r5:c047729c
[   13.644506]  r4:e9b25b80
[   13.647118] ---[ end trace 4ddd29ac9505935c ]---
[   13.651768] cpu cpu0: multiple regulators are not supported
[ #
  13.655036] usb 1-1: new high-speed USB device number 2 using xhci-hcd
[   13.657394] cpufreq: __target_index: Failed to change cpu frequency: -22
[   13.670803] ------------[ cut here ]------------
[   13.675501] WARNING: CPU: 0 PID: 21 at drivers/opp/core.c:678
dev_pm_opp_set_rate+0x4cc/0x5d4
[   13.684068] Modules linked in:
[   13.687178] CPU: 0 PID: 21 Comm: kworker/0:1 Tainted: G        W
     5.9.0-rc2-next-20200825 #1
[   13.696267] Hardware name: Generic DRA74X (Flattened Device Tree)
[   13.702394] Workqueue: events dbs_work_handler
[   13.706861] Backtrace:
[   13.709334] [<c040e860>] (dump_backtrace) from [<c040ebd4>]
(show_stack+0x20/0x24)
[   13.716942]  r7:c20cca94 r6:00000000 r5:60000013 r4:c20cca94
[   13.722633] [<c040ebb4>] (show_stack) from [<c0941338>]
(dump_stack+0xec/0x118)
[   13.729983] [<c094124c>] (dump_stack) from [<c0451530>] (__warn+0xe8/0x100)
[   13.736978]  r10:e8b50600 r9:00000009 r8:c105f6f4 r7:000002a6
r6:c105f6f4 r5:00000009
[   13.744844]  r4:00000000 r3:c2004f30
[   13.748442] [<c0451448>] (__warn) from [<c04518fc>]
(warn_slowpath_fmt+0x74/0xc4)
[   13.755960]  r7:000002a6 r6:c1b42034 r5:00000000 r4:e9b50000
[   13.761649] [<c045188c>] (warn_slowpath_fmt) from [<c105f6f4>]
(dev_pm_opp_set_rate+0x4cc/0x5d4)
[   13.770479]  r9:e8b50280 r8:e9b50000 r7:ffffffea r6:3b9aca00
r5:59682f00 r4:e8902c00
[   13.778263] [<c105f228>] (dev_pm_opp_set_rate) from [<c106aa8c>]
(set_target+0x3c/0x64)
[   13.786304]  r10:00000002 r9:00000000 r8:c22b508c r7:c2227048
r6:0016e360 r5:00000000
[   13.794168]  r4:e8903000
[   13.796717] [<c106aa50>] (set_target) from [<c1064ca0>]
(__cpufreq_driver_target+0x2d0/0x628)
[   13.805281]  r7:c2227048 r6:e9b50000 r5:00000000 r4:e8903000
[   13.810971] [<c10649d0>] (__cpufreq_driver_target) from
[<c1069040>] (od_dbs_update+0x14c/0x170)
[   13.819797]  r10:c2204070 r9:e8b50880 r8:e8b50800 r7:e8b51440
r6:e8b50880 r5:e8b50800
[   13.827662]  r4:e8903000
[   13.830213] [<c1068ef4>] (od_dbs_update) from [<c1069d5c>]
(dbs_work_handler+0x3c/0x68)
[   13.838256]  r9:00000000 r8:c21d902c r7:e8903000 r6:e8b50804
r5:00000000 r4:e8b50838
[   13.846042] [<c1069d20>] (dbs_work_handler) from [<c046f204>]
(process_one_work+0x200/0x560)
[   13.854518]  r9:00000000 r8:00000000 r7:efc2c600 r6:efc29300
r5:e9b24500 r4:e8b50838
[   13.862301] [<c046f004>] (process_one_work) from [<c046f5b0>]
(worker_thread+0x4c/0x57c)
[   13.870431]  r10:efc29300 r9:00000008 r8:c2003d00 r7:efc29318
r6:e9b24514 r5:efc29300
[   13.878295]  r4:e9b24500
[   13.880846] [<c046f564>] (worker_thread) from [<c04773e0>]
(kthread+0x144/0x170)
[   13.888278]  r10:e9979e7c r9:e9b24500 r8:c046f564 r7:e9b50000
r6:00000000 r5:e9b25b80
[   13.896144]  r4:e99c0140
[   13.898694] [<c047729c>] (kthread) from [<c040024c>]
(ret_from_fork+0x14/0x28)
[   13.905948] Exception stack(0xe9b51fb0 to 0xe9b51ff8)
[   13.911024] 1fa0:                                     00000000
00000000 00000000 00000000
[   13.919241] 1fc0: 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
[   13.927457] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[   13.934104]  r10:00000000 r9:00000000 r8:00000000 r7:00000000
r6:00000000 r5:c047729c
[   13.941967]  r4:e9b25b80
[   13.944558] ---[ end trace 4ddd29ac9505935d ]---
[   13.949228] cpu cpu0: multiple regulators are not supported
[   13.954832] cpufreq: __target_index: Failed to change cpu frequency: -22
#
[   13.961638] ------------[ cut here ]------------
[   13.961941] sdhci-omap 4809c000.mmc: no pinctrl state for ddr_3_3v mode
[   13.966303] WARNING: CPU: 0 PID: 21 at drivers/opp/core.c:678
dev_pm_opp_set_rate+0x4cc/0x5d4
[   13.966311] Modules linked in:
[   13.984620] CPU: 0 PID: 21 Comm: kworker/0:1 Tainted: G        W
     5.9.0-rc2-next-20200825 #1
[   13.993706] Hardware name: Generic DRA74X (Flattened Device Tree)
[   13.999833] Workqueue: events dbs_work_handler
[   14.004301] Backtrace:
[   14.006772] [<c040e860>] (dump_backtrace) from [<c040ebd4>]
(show_stack+0x20/0x24)
[   14.014379]  r7:c20cca94 r6:00000000 r5:60000013 r4:c20cca94
[   14.020071] [<c040ebb4>] (show_stack) from [<c0941338>]
(dump_stack+0xec/0x118)
[   14.027418] [<c094124c>] (dump_stack) from [<c0451530>] (__warn+0xe8/0x100)
[   14.034416]  r10:e8b50600 r9:00000009 r8:c105f6f4 r7:000002a6
r6:c105f6f4 r5:00000009
[   14.042282]  r4:00000000 r3:c2004f30
[   14.045878] [<c0451448>] (__warn) from [<c04518fc>]
(warn_slowpath_fmt+0x74/0xc4)
[   14.053394]  r7:000002a6 r6:c1b42034 r5:00000000 r4:e9b50000
[   14.059082] [<c045188c>] (warn_slowpath_fmt) from [<c105f6f4>]
(dev_pm_opp_set_rate+0x4cc/0x5d4)
[   14.067912]  r9:e8b50280 r8:e9b50000 r7:ffffffea r6:3b9aca00
r5:59682f00 r4:e8902c00
[   14.075695] [<c105f228>] (dev_pm_opp_set_rate) from [<c106aa8c>]
(set_target+0x3c/0x64)
[   14.083736]  r10:00000002 r9:00000000 r8:c22b508c r7:c2227048
r6:0016e360 r5:00000000
[   14.091600]  r4:e8903000
[   14.094150] [<c106aa50>] (set_target) from [<c1064ca0>]
(__cpufreq_driver_target+0x2d0/0x628)
[   14.102715]  r7:c2227048 r6:e9b50000 r5:00000000 r4:e8903000
[   14.108403] [<c10649d0>] (__cpufreq_driver_target) from
[<c1069040>] (od_dbs_update+0x14c/0x170)
[   14.117229]  r10:c2204070 r9:e8b50880 r8:e8b50800 r7:e8b51440
r6:e8b50880 r5:e8b50800
[   14.125094]  r4:e8903000
[   14.127646] [<c1068ef4>] (od_dbs_update) from [<c1069d5c>]
(dbs_work_handler+0x3c/0x68)
[   14.135690]  r9:00000000 r8:c21d902c r7:e8903000 r6:e8b50804
r5:00000000 r4:e8b50838
[   14.143476] [<c1069d20>] (dbs_work_handler) from [<c046f204>]
(process_one_work+0x200/0x560)
[   14.151954]  r9:00000000 r8:00000000 r7:efc2c600 r6:efc29300
r5:e9b24500 r4:e8b50838
[   14.159737] [<c046f004>] (process_one_work) from [<c046f5b0>]
(worker_thread+0x4c/0x57c)
[   14.167867]  r10:efc29300 r9:00000008 r8:c2003d00 r7:efc29318
r6:e9b24514 r5:efc29300
[   14.175732]  r4:e9b24500
[   14.178282] [<c046f564>] (worker_thread) from [<c04773e0>]
(kthread+0x144/0x170)
[   14.185715]  r10:e9979e7c r9:e9b24500 r8:c046f564 r7:e9b50000
r6:00000000 r5:e9b25b80
[   14.193578]  r4:e99c0140
[   14.196127] [<c047729c>] (kthread) from [<c040024c>]
(ret_from_fork+0x14/0x28)
[   14.203381] Exception stack(0xe9b51fb0 to 0xe9b51ff8)
[   14.208458] 1fa0:                                     00000000
00000000 00000000 00000000
[   14.216674] 1fc0: 00000000 00000000 00000000 00000000 00000000
00000000 00000000 00000000
[   14.224889] 1fe0: 00000000 00000000 00000000 00000000 00000013 00000000
[   14.231536]  r10:00000000 r9:00000000 r8:00000000 r7:00000000
r6:00000000 r5:c047729c
[   14.239400]  r4:e9b25b80
[   14.242012] ---[ end trace 4ddd29ac9505935e ]---
[   14.246695] cpu cpu0: multiple regulators are not supported
[   14.252301] cpufreq: __target_index: Failed to change cpu frequency: -22
[   14.259160] ------------[ cut here ]------------
[   14.263821] WARNIN#
G: CPU: 0 PID: 21 at drivers/opp/core.c:678 dev_pm_opp_set_rate+0x4cc/0x5d4
[   14.272406] Modules linked in:
[   14.275542] CPU: 0 PID: 21 Comm: kworker/0:1 Tainted: G        W
     5.9.0-rc2-next-20200825 #1
[   14.284629] Hardware name: Generic DRA74X (Flattened Device Tree)
[   14.290756] Workqueue: events dbs_work_handler
[   14.295223] Backtrace:

Full log,
https://pastebin.com/HwTf2VMA

-- 
Linaro LKFT
https://lkft.linaro.org



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