[Bug 214422] FreeBSD panic when you try to load if_iwm.ko via loader.conf

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=214422

            Bug ID: 214422
           Summary: FreeBSD panic when you try to load if_iwm.ko via
                    loader.conf
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs at FreeBSD.org
          Reporter: subbsd at gmail.com
                CC: freebsd-amd64 at FreeBSD.org
                CC: freebsd-amd64 at FreeBSD.org

uname -a:

FreeBSD test.my.domain 12.0-CURRENT FreeBSD 12.0-CURRENT #1
f16dfbd(drm-next-4.7)-dirty: Fri Nov 11 15:26:29 MSK 2016    
root at test.my.domain:/usr/obj/usr/src/sys/GENERIC  amd64 

If module loaded via loader.conf ( if_iwm_load="YES" ) ,
FreeBSD panic:
--
iwm0: iwm_start_fw: failed 35
iwm0: failed to load init firmware

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x64
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff80ab7f75
stack pointer = 0x20:0xffffffff824ee930
frame pointer = 0x20:0xffffffff824ee930
code segment = base 0x0, limit 0xfffff, type 0x1b
                      = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 0 (swapper)
[ thread pid 0 tid 100000 ]
Stopped at taskqueue_drain+0x16: cmpl $0, 0x64(%r14)
--

May be missed some dependencies on this stage? When loading via kldload from
multiuser mode - all fine. On my host, after kldload if_iwm, also iwm8000Cfw.ko
has been loaded automatically

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