[Bug 283815] listing dev.vgapci.X.%iommu hangs indefinitely on NVIDIA card

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=283815

--- Comment #8 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=6ba2c036a0117ac02f9979b7dc49f15e9c1ea9c9

commit 6ba2c036a0117ac02f9979b7dc49f15e9c1ea9c9
Author:     Konstantin Belousov <kib@FreeBSD.org>
AuthorDate: 2025-01-06 23:29:18 +0000
Commit:     Konstantin Belousov <kib@FreeBSD.org>
CommitDate: 2025-01-07 15:34:59 +0000

    pci_find_cap_method(): limit number of iterations for finding a capability

    Powered down device might return 0xff of extended config registers
    reads, causing loop.

    PR:     283815
    Reviewed by:    imp
    Sponsored by:   The FreeBSD Foundation
    MFC after:      1 week
    Differential revision:  https://reviews.freebsd.org/D48348

 sys/dev/pci/pci.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

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