git: 2244269424ae - stable/14 - e1000: Increase FC pause/refresh time on PCH2 and newer

The branch stable/14 has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=2244269424ae439f0234d238c2674a95c0b459a3

commit 2244269424ae439f0234d238c2674a95c0b459a3
Author:     Kevin Bowling <kbowling@FreeBSD.org>
AuthorDate: 2026-02-13 06:30:22 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2026-02-27 23:10:13 +0000

    e1000: Increase FC pause/refresh time on PCH2 and newer
    
    This corresponds to Linux f74dc880098b4a29f76d756b888fb31d81ad9a0c
    
    That commit does not provide any public background detail, but it's been
    in use for over 5 years and corresponds to previous chip bugs w.r.t.
    automatic generation of PAUSE frames.
    
    Reviewed by:    kgalazka
    Differential Revision:  https://reviews.freebsd.org/D54555
    
    (cherry picked from commit 2bdec2ee73be7dbafce9982b0dc5c273918a5443)
---
 sys/dev/e1000/if_em.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c
index 318620c944a3..248d14f5974c 100644
--- a/sys/dev/e1000/if_em.c
+++ b/sys/dev/e1000/if_em.c
@@ -3218,8 +3218,8 @@ em_reset(if_ctx_t ctx)
 	case e1000_pch_ptp:
 		hw->fc.high_water = 0x5C20;
 		hw->fc.low_water = 0x5048;
-		hw->fc.pause_time = 0x0650;
-		hw->fc.refresh_time = 0x0400;
+		hw->fc.pause_time = 0xFFFF;
+		hw->fc.refresh_time = 0xFFFF;
 		/* Jumbos need adjusted PBA */
 		if (if_getmtu(ifp) > ETHERMTU)
 			E1000_WRITE_REG(hw, E1000_PBA, 12);