[Bug 278176] iwn panic (in attach error handling path)

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278176

            Bug ID: 278176
           Summary: iwn panic (in attach error handling path)
           Product: Base System
           Version: CURRENT
          Hardware: arm64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: wireless
          Assignee: wireless@FreeBSD.org
          Reporter: bz@FreeBSD.org
            Blocks: 278175

# devctl disable pci4:44:0:0
# devctl enable pci4:44:0:0
iwn1: <Intel WiFi Link 5100> mem 0x45800000-0x45801fff at device 0.0 on pci44
iwn1: attempting to allocate 1 MSI vectors (1 supported)
iwn1: using IRQ 162 for MSI
iwn1: iwn_read_eeprom: could not power ON adapter, error 60
iwn1: could not read EEPROM, error 60
Fatal data abort:
  x0: 0x0000000000000000
  x1: 0xffff0001d168d640
  x2: 0xffff0001d518c1bb ($d.6 + 0xe4f)
  x3: 0x000000000000236b
  x4: 0xffffa02f7fd8d300
  x5: 0x0000000000000026
  x6: 0xffff00000050b2a8 (kvprintf + 0x2cc)
  x7: 0x000000000000006d
  x8: 0xffff0001d168d640
  x9: 0x0000000000000001
 x10: 0x0000000000000000
 x11: 0xffff00000102e898 (w_locklistdata + 0x38a50)
 x12: 0x0000000000000002
 x13: 0x0000000000000001
 x14: 0x0000000000010000
 x15: 0x0000000000000001
 x16: 0xffff0001d51bdb70 (_DYNAMIC + 0x298)
 x17: 0xffff00000051c7e8 (taskqueue_drain_all + 0x0)
 x18: 0xffff000151fe7380
 x19: 0x0000000000000000
 x20: 0xffffa02027486000
 x21: 0xffff0001d8790038 ($d.7 + 0x35b0088)
 x22: 0xffff0001d8790030 ($d.7 + 0x35b0080)
 x23: 0x0000000000000000
 x24: 0xffff0001d87d3d10 ($d.7 + 0x35f3d60)
 x25: 0xffff0001d87d3d10 ($d.7 + 0x35f3d60)
 x26: 0xffff0001d8796b60 ($d.7 + 0x35b6bb0)
 x27: 0xffff0001d87d4b30 ($d.7 + 0x35f4b80)
 x28: 0x000000006097de00
 x29: 0xffff000151fe73a0
  sp: 0xffff000151fe7380
  lr: 0xffff0001d519dc10 (iwn_detach + 0x104)
 elr: 0xffff00000051c804 (taskqueue_drain_all + 0x1c)
spsr: 0x0000000020000045
 far: 0x0000000000000124
 esr: 0x0000000096000004
panic: vm_fault failed: 0xffff00000051c804 error 1
cpuid = 11
time = 1712264754
KDB: stack backtrace:
db_trace_self() at db_trace_self
db_trace_self_wrapper() at db_trace_self_wrapper+0x38
vpanic() at vpanic+0x1a4
panic() at panic+0x48
data_abort() at data_abort+0x368
handle_el1h_sync() at handle_el1h_sync+0x18
--- exception, esr 0x96000004
taskqueue_drain_all() at taskqueue_drain_all+0x1c
iwn_detach() at iwn_detach+0x100
iwn_attach() at iwn_attach+0xee4
device_attach() at device_attach+0x3fc
device_probe_and_attach() at device_probe_and_attach+0x80
devctl2_ioctl() at devctl2_ioctl+0x484
devfs_ioctl() at devfs_ioctl+0xd8
vn_ioctl() at vn_ioctl+0xc4
devfs_ioctl_f() at devfs_ioctl_f+0x24
kern_ioctl() at kern_ioctl+0x2e0
sys_ioctl() at sys_ioctl+0x148
do_el0_sync() at do_el0_sync+0x59c
handle_el0_sync() at handle_el0_sync+0x48
--- exception, esr 0x56000000
KDB: enter: panic
[ thread pid 2833 tid 100338 ]
Stopped at      kdb_enter+0x4c: str     xzr, [x19, #1408]


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=278175
[Bug 278175] Intel native driver meta-bug (iwi, iwn, iwm)
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