git: 28f96cc3748f - main - e1000: Identify SerDes adapters with LED blink

The branch main has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=28f96cc3748fc46408cc6ab6172f09bc2182cad7

commit 28f96cc3748fc46408cc6ab6172f09bc2182cad7
Author:     Kevin Bowling <kbowling@FreeBSD.org>
AuthorDate: 2026-08-12 00:29:17 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2026-08-12 02:58:08 +0000

    e1000: Identify SerDes adapters with LED blink
    
    The generic LED on and off operations do not handle internal SerDes
    media, leaving the led(4) device ineffective on my I210 fiber port.
    
    Use the hardware blink operation for the on phase on internal SerDes.
    The off phase restores the saved OEM LED configuration as before.
    
    MFC after:      2 weeks
---
 sys/dev/e1000/if_em.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c
index 5a02514a89e3..66a298ecf21c 100644
--- a/sys/dev/e1000/if_em.c
+++ b/sys/dev/e1000/if_em.c
@@ -5517,7 +5517,10 @@ em_if_led_func(if_ctx_t ctx, int onoff)
 
 	if (onoff) {
 		e1000_setup_led(&sc->hw);
-		e1000_led_on(&sc->hw);
+		if (sc->hw.phy.media_type == e1000_media_type_internal_serdes)
+			e1000_blink_led(&sc->hw);
+		else
+			e1000_led_on(&sc->hw);
 	} else {
 		e1000_led_off(&sc->hw);
 		e1000_cleanup_led(&sc->hw);