[Bisected] [commit 2ad56efa80dba89162106c06ebc00b611325e584] [linux-next] WARNING while booting to kernel 6.6.0-rc3-next-20230929

[Tasmiya Nalatwad]

Greetings,

[linux-next] [6.6.0-rc3-next-20230929] [git bisect -> 
2ad56efa80dba89162106c06ebc00b611325e584]WARNING: CPU: 0 PID: 8 at 
arch/powerpc/kernel/iommu.c:407 __iommu_free+0x1e4/0x1f0

--- Traces ---

[   62.578338] WARNING: CPU: 0 PID: 8 at arch/powerpc/kernel/iommu.c:407 
__iommu_free+0x1e4/0x1f0
[   62.578345] Modules linked in: sd_mod t10_pi crc64_rocksoft crc64 sg 
ibmvfc mlx5_core(+) scsi_transport_fc ibmveth mlxfw psample dm_multipath 
dm_mirror dm_region_hash dm_log dm_mod fuse
[   62.578362] CPU: 0 PID: 8 Comm: kworker/0:0 Not tainted 
6.6.0-rc3-next-20230929-auto #1
[   62.578366] Hardware name: IBM,9080-HEX POWER10 (raw) 0x800200 
0xf000006 of:IBM,FW1030.30 (NH1030_062) hv:phyp pSeries
[   62.578369] Workqueue: events work_for_cpu_fn
[   62.578374] NIP:  c00000000005f6d4 LR: c00000000005f6d0 CTR: 
00000000005ca81c
[   62.578377] REGS: c000000003a27890 TRAP: 0700   Not tainted 
(6.6.0-rc3-next-20230929-auto)
[   62.578381] MSR:  800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>  
CR: 48000824  XER: 00000008
[   62.578391] CFAR: c00000000020f738 IRQMASK: 0
[   62.578391] GPR00: c00000000005f6d0 c000000003a27b30 c000000001481800 
0000000000000017
[   62.578391] GPR04: 00000000ffff7fff c000000003a27950 c000000003a27948 
0000000000000027
[   62.578391] GPR08: c000000c18c07c10 0000000000000001 0000000000000027 
c000000002ac8a08
[   62.578391] GPR12: 0000000000000000 c000000002ff0000 c00000000019cc88 
c000000003042300
[   62.578391] GPR16: 0000000000000000 0000000000000000 0000000000000000 
c000000003071ab0
[   62.578391] GPR20: c00000000349f80d c000000003215440 c000000003215480 
61c8864680b583eb
[   62.578391] GPR24: 0000000000000000 000000007fffffff 0800000020000000 
0000000000000010
[   62.578391] GPR28: 0000000000020000 0000800000020000 c00000000c5dc800 
c00000000c5dc880
[   62.578428] NIP [c00000000005f6d4] __iommu_free+0x1e4/0x1f0
[   62.578432] LR [c00000000005f6d0] __iommu_free+0x1e0/0x1f0
[   62.578435] Call Trace:
[   62.578437] [c000000003a27b30] [c00000000005f6d0] 
__iommu_free+0x1e0/0x1f0 (unreliable)
[   62.578442] [c000000003a27bc0] [c00000000005f848] iommu_free+0x28/0x70
[   62.578446] [c000000003a27bf0] [c000000000061518] 
iommu_free_coherent+0x68/0xa0
[   62.578450] [c000000003a27c20] [c00000000005e8d4] 
dma_iommu_free_coherent+0x24/0x40
[   62.578455] [c000000003a27c40] [c00000000024698c] 
dma_free_attrs+0x10c/0x140
[   62.578459] [c000000003a27c90] [c008000000dcb8d4] 
mlx5_cmd_cleanup+0x5c/0x90 [mlx5_core]
[   62.578512] [c000000003a27cc0] [c008000000dc45a0] 
mlx5_mdev_uninit+0xc8/0x100 [mlx5_core]
[   62.578558] [c000000003a27d00] [c008000000dc4ac4] 
probe_one+0x3ec/0x530 [mlx5_core]
[   62.578602] [c000000003a27d90] [c0000000008c5edc] 
local_pci_probe+0x6c/0x110
[   62.578607] [c000000003a27e10] [c000000000189c98] 
work_for_cpu_fn+0x38/0x60
[   62.578612] [c000000003a27e40] [c00000000018d1d0] 
process_scheduled_works+0x230/0x4f0
[   62.578616] [c000000003a27f10] [c00000000018ff14] 
worker_thread+0x1e4/0x500
[   62.578619] [c000000003a27f90] [c00000000019cdb8] kthread+0x138/0x140
[   62.578624] [c000000003a27fe0] [c00000000000df98] 
start_kernel_thread+0x14/0x18
[   62.578628] Code: 481b004d 60000000 e89e0028 3c62ffe0 3863dd20 
481b0039 60000000 e89e0038 3c62ffe0 3863dd38 481b0025 60000000 
<0fe00000> 4bffff20 60000000 3c4c0142
[   62.578640] ---[ end trace 0000000000000000 ]---
[   62.578646] iommu_free: invalid entry
[   62.578649]     entry     = 0x8000000203d0
[   62.578650]     dma_addr  = 0x8000000203d0000
[   62.578652]     Table     = 0xc00000000c5dc800
[   62.578654]     bus#      = 0x1
[   62.578655]     size      = 0x20000
[   62.578657]     startOff  = 0x800000000000
[   62.578658]     index     = 0x70200016
[   62.578660] ------------[ cut here ]------------

gitbisect is pointing to the below commit

commit 2ad56efa80dba89162106c06ebc00b611325e584
Author: Jason Gunthorpe <jgg at nvidia.com>
Date:   Wed Sep 13 10:43:36 2023 -0300

     powerpc/iommu: Setup a default domain and remove set_platform_dma_ops

-- 
Regards,
Tasmiya Nalatwad
IBM Linux Technology Center
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