Sasha, could you consider including this cherry-picked patchset in v4.14.
Kernel v4.14 might suffer from the following unbalanced enablement for the
board Hikey 960:
Nov 5 12:02:54 hikey kernel: [ 22.148194] Unbalanced enable for IRQ 44
Nov 5 12:02:54 hikey kernel: [ 22.152193] ------------[ cut here
]------------
Nov 5 12:02:54 hikey kernel: [ 22.156872] WARNING: CPU: 2 PID: 509 at
/home/inaddy/work/sources/linux/stable/stable-linux-4.14.y/kernel/irq/manage.c:525
__enable_irq+0x78/0x80
Nov 5 12:02:54 hikey kernel: [ 22.249606] CPU: 2 PID: 509 Comm: kworker/2:2
Not tainted 4.14.79 #1
Nov 5 12:02:54 hikey kernel: [ 22.255975] Hardware name: HiKey Development
Board (DT)
Nov 5 12:02:54 hikey kernel: [ 22.261248] Workqueue: events_freezable
thermal_zone_device_check
Nov 5 12:02:54 hikey kernel: [ 22.267368] task: ffff8000616e0e00 task.stack:
ffff00000b5f0000
Nov 5 12:02:54 hikey kernel: [ 22.273312] PC is at __enable_irq+0x78/0x80
Nov 5 12:02:54 hikey kernel: [ 22.277516] LR is at __enable_irq+0x78/0x80
Nov 5 12:02:54 hikey kernel: [ 22.281718] pc : [<ffff00000813e010>] lr :
[<ffff00000813e010>] pstate: 000001c5
Nov 5 12:02:54 hikey kernel: [ 22.289129] sp : ffff00000b5f3c80
Nov 5 12:02:54 hikey kernel: [ 22.292457] x29: ffff00000b5f3c80 x28:
0000000000000000
Nov 5 12:02:54 hikey kernel: [ 22.297804] x27: ffff80005c139e38 x26:
ffff000008a71870
Nov 5 12:02:54 hikey kernel: [ 22.303148] x25: 0000000000000000 x24:
0000000000000002
Nov 5 12:02:54 hikey kernel: [ 22.308492] x23: ffff00000b5f3d9c x22:
ffff80005d565e88
Nov 5 12:02:54 hikey kernel: [ 22.313836] x21: 000000000000f980 x20:
000000000000002c
Nov 5 12:02:54 hikey kernel: [ 22.319181] x19: ffff800061726000 x18:
0000000000000010
Nov 5 12:02:54 hikey kernel: [ 22.324524] x17: 0000000000000000 x16:
0000000000000000
Nov 5 12:02:54 hikey kernel: [ 22.329868] x15: ffffffffffffffff x14:
ffff000009269c08
Nov 5 12:02:54 hikey kernel: [ 22.335213] x13: ffff00008940678f x12:
ffff000009406797
Nov 5 12:02:54 hikey kernel: [ 22.340558] x11: ffff000009290000 x10:
ffff00000b5f3980
Nov 5 12:02:54 hikey kernel: [ 22.345902] x9 : 00000000ffffffd0 x8 :
ffff00000862c298
Nov 5 12:02:54 hikey kernel: [ 22.351246] x7 : 6c62616e65206465 x6 :
00000000000001b2
Nov 5 12:02:54 hikey kernel: [ 22.356589] x5 : 0000000000000000 x4 :
0000000000000000
Nov 5 12:02:54 hikey kernel: [ 22.361931] x3 : 0000000000000000 x2 :
ffff800063e824c8
Nov 5 12:02:54 hikey kernel: [ 22.367275] x1 : 000080005af95000 x0 :
000000000000001c
Nov 5 12:02:54 hikey kernel: [ 22.372618] Call trace:
Nov 5 12:02:54 hikey kernel: [ 22.375088] Exception stack(0xffff00000b5f3b40
to 0xffff00000b5f3c80)
Nov 5 12:02:54 hikey kernel: [ 22.381560] 3b40: 000000000000001c
000080005af95000 ffff800063e824c8 0000000000000000
Nov 5 12:02:54 hikey kernel: [ 22.389417] 3b60: 0000000000000000
0000000000000000 00000000000001b2 6c62616e65206465
Nov 5 12:02:54 hikey kernel: [ 22.397276] 3b80: ffff00000862c298
00000000ffffffd0 ffff00000b5f3980 ffff000009290000
Nov 5 12:02:54 hikey kernel: [ 22.405136] 3ba0: ffff000009406797
ffff00008940678f ffff000009269c08 ffffffffffffffff
Nov 5 12:02:54 hikey kernel: [ 22.412994] 3bc0: 0000000000000000
0000000000000000 0000000000000010 ffff800061726000
Nov 5 12:02:54 hikey kernel: [ 22.420852] 3be0: 000000000000002c
000000000000f980 ffff80005d565e88 ffff00000b5f3d9c
Nov 5 12:02:54 hikey kernel: [ 22.428710] 3c00: 0000000000000002
0000000000000000 ffff000008a71870 ffff80005c139e38
Nov 5 12:02:54 hikey kernel: [ 22.436569] 3c20: 0000000000000000
ffff00000b5f3c80 ffff00000813e010 ffff00000b5f3c80
Nov 5 12:02:54 hikey kernel: [ 22.444426] 3c40: ffff00000813e010
00000000000001c5 0000000000000000 0000000000000000
Nov 5 12:02:54 hikey kernel: [ 22.452286] 3c60: ffffffffffffffff
ffff800061800618 ffff00000b5f3c80 ffff00000813e010
Nov 5 12:02:54 hikey kernel: [ 22.460144] [<ffff00000813e010>]
__enable_irq+0x78/0x80
Nov 5 12:02:54 hikey kernel: [ 22.465394] [<ffff00000813e058>]
enable_irq+0x40/0x78
Nov 5 12:02:54 hikey kernel: [ 22.470493] [<ffff000000e228a8>]
hisi_thermal_get_temp+0x1b0/0x1d8 [hisi_thermal]
Nov 5 12:02:54 hikey kernel: [ 22.478008] [<ffff0000087121a8>]
of_thermal_get_temp+0x38/0x50
Nov 5 12:02:54 hikey kernel: [ 22.483869] [<ffff000008711790>]
thermal_zone_get_temp+0x58/0x80
Nov 5 12:02:54 hikey kernel: [ 22.489903] [<ffff00000870e7bc>]
thermal_zone_device_update.part.4+0x2c/0x1a8
Nov 5 12:02:54 hikey kernel: [ 22.497066] [<ffff00000870e9c8>]
thermal_zone_device_check+0x40/0x50
Nov 5 12:02:54 hikey kernel: [ 22.503457] [<ffff0000080f1674>]
process_one_work+0x19c/0x3d0
Nov 5 12:02:54 hikey kernel: [ 22.509236] [<ffff0000080f18f4>]
worker_thread+0x4c/0x428
Nov 5 12:02:54 hikey kernel: [ 22.514664] [<ffff0000080f84fc>]
kthread+0x134/0x138
Nov 5 12:02:54 hikey kernel: [ 22.519659] [<ffff000008085154>]
ret_from_fork+0x10/0x1c
Nov 5 12:02:54 hikey kernel: [ 22.524988] ---[ end trace 328d4bb2d9b066a0
]---
This issue was solved when "hisi_thermal_alarm_irq" function was removed so only
"hisi_thermal_alarm_irq_thread" would exist. This has fixed the issue for the
unbalanced enablement since there is no more:
disable_irq_nosync(irq);
data->irq_enabled = false;
logic being done in parallel to the threaded handler AND the
thermal_zone_device_update() call only happens now if the temperature is already
above the threshold.
