Date: Thu, 06 Aug 2026 07:38:50 +0000 From: Kevin Bowling <kbowling@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: fbdb8728d327 - stable/15 - igb: Stop writing the legacy TADV register Message-ID: <6a743a0a.34860.241877d6@gitrepo.freebsd.org>
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The branch stable/15 has been updated by kbowling: URL: https://cgit.FreeBSD.org/src/commit/?id=fbdb8728d327b8f9f3239ce2733bfd31ce13514c commit fbdb8728d327b8f9f3239ce2733bfd31ce13514c Author: Kevin Bowling <kbowling@FreeBSD.org> AuthorDate: 2026-07-29 04:23:30 +0000 Commit: Kevin Bowling <kbowling@FreeBSD.org> CommitDate: 2026-08-06 07:38:27 +0000 igb: Stop writing the legacy TADV register TADV is an em-class interrupt delay register and is absent from the 82575 and later register model. The igb attach path does not expose or initialize that control, but transmit initialization still wrote its zero valued storage into a reserved queue-window offset. Apply the same igb_mac_min boundary already used for TIDV and the absolute-delay sysctls. Sponsored by: BBOX.io (cherry picked from commit c637d474045a41b1763c17a8b4b7763d4159504f) --- sys/dev/e1000/if_em.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c index 37a118a45848..c5e4676f64c7 100644 --- a/sys/dev/e1000/if_em.c +++ b/sys/dev/e1000/if_em.c @@ -3763,7 +3763,7 @@ em_initialize_transmit_unit(if_ctx_t ctx) sc->txd_cmd |= E1000_TXD_CMD_IDE; } - if (hw->mac.type >= e1000_82540) + if (hw->mac.type >= e1000_82540 && hw->mac.type < igb_mac_min) E1000_WRITE_REG(hw, E1000_TADV, sc->tx_abs_int_delay.value); if (hw->mac.type == e1000_82571 || hw->mac.type == e1000_82572) {home | help
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