git: 45aac708880c - stable/15 - ixgbe: Re-enable the SFP laser during initialization

The branch stable/15 has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=45aac708880c56d4e1dfe67b314beeaf31d1dd43

commit 45aac708880c56d4e1dfe67b314beeaf31d1dd43
Author:     Kevin Bowling <[email protected]>
AuthorDate: 2026-08-06 08:21:35 +0000
Commit:     Kevin Bowling <[email protected]>
CommitDate: 2026-08-16 20:57:42 +0000

    ixgbe: Re-enable the SFP laser during initialization
    
    ixgbe_if_stop() disables the transmit laser on every 82599 SFP fiber
    port, but the iflib initialization path did not re-enable it. Re-enable
    the laser before deferred SFP module setup so interface
    reinitialization cannot leave either single-speed or multispeed optics
    dark.
    
    The hardware wrapper is a no-op when laser control is unavailable. The
    placement follows Intel ix-3.4.39; this version deliberately applies to
    every SFP port affected by the stop path.
    
    (cherry picked from commit 545779a99290b7b7d94dece6c096ce230be91ff9)
---
 sys/dev/ixgbe/if_ix.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sys/dev/ixgbe/if_ix.c b/sys/dev/ixgbe/if_ix.c
index 541ca96d3228..367f2b4d0f6e 100644
--- a/sys/dev/ixgbe/if_ix.c
+++ b/sys/dev/ixgbe/if_ix.c
@@ -1803,6 +1803,8 @@ ixgbe_config_link(if_ctx_t ctx)
 	sfp = ixgbe_is_sfp(hw);
 
 	if (sfp) {
+		/* ixgbe_if_stop() disables it on every 82599 SFP port. */
+		ixgbe_enable_tx_laser(hw);
 		sc->task_requests |= IXGBE_REQUEST_TASK_MOD;
 		iflib_admin_intr_deferred(ctx);
 	} else {