[Bug 282789] iwlwifi hangs on boot with request_module_nowait("iwlmvm") -- broken after 2ac644317e671b001d3fb8fd924a1ae808a0bf32

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=282789

--- Comment #11 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=87e140a5c6f89eea7ea6320d1ae34566492abfc0

commit 87e140a5c6f89eea7ea6320d1ae34566492abfc0
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2024-12-08 20:24:10 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2024-12-09 14:45:24 +0000

    iwlwifi: avoid (hard) hang on loading module

    For certain users or chipsets (reports were for CNVi devices but
    we are not sure if this is limited or specific to them) loading
    if_iwlwifi hangs.

    The reason for this is that a SYSINIT (module_load_order()) has not
    yet run in this case and the Linux driver tries to load the
    chipsets-specific module.  On FreeBSD all supported sub-modules are
    part of if_iwlwifi so we do not have to load them separately but
    calling into kern_kldload via LinuxKPI request_module while loading
    the module gives us a hard hang.

    iwlwifi calls request_module_nowait() so we can simply skip over this
    and continue and the SYSINIT will do the job later if no other
    dependencies fail.

    Sponsored by:   The FreeBSD Foundation
    MFC after:      3 days
    PR:             282789
    Tested by:      Ruslan Makhmatkhanov, Pete Wright
    Differential Revision: https://reviews.freebsd.org/D47994

 sys/contrib/dev/iwlwifi/iwl-drv.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

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