[Bug 236119] Intel Ethernet 82547 device cannot transfer data

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=236119

--- Comment #4 from commit-hook at FreeBSD.org ---
A commit in branch stable/12 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=1a132077c2cb500410079f9120c3f676d15f7931

commit 1a132077c2cb500410079f9120c3f676d15f7931
Author:     Kevin Bowling <kbowling at FreeBSD.org>
AuthorDate: 2021-04-15 16:58:36 +0000
Commit:     Kevin Bowling <kbowling at FreeBSD.org>
CommitDate: 2021-05-18 07:48:49 +0000

    e1000: fix em_mac_min and 82547 packet buffer

    The boundary differentiating "lem" vs "em" class devices was wrong
    after the iflib conversion of lem(4).

    The Packet Buffer size for 82547 class chips was not set correctly
    after the iflib conversion of lem(4).

    These changes restore functionality on an 82547 for the submitter.

    PR:             236119
    Reported by:    Jeff Gibbons <jgibbons at protogate.com>
    Reviewed by:    markj
    MFC after:      1 month
    Differential Revision:  https://reviews.freebsd.org/D29766

    (cherry picked from commit bb1b375fa7487ee5c3843121a0621ac8379c18e6)

 sys/dev/e1000/if_em.c | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

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