git: 30ccf2f48c11 - main - igc: defer sysctl-driven reinit to the admin task

The branch main has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=30ccf2f48c11e54fc0540510dcec7cd006a2c366

commit 30ccf2f48c11e54fc0540510dcec7cd006a2c366
Author:     Abdelkader Boudih <seuros@seuros.com>
AuthorDate: 2026-08-05 04:40:58 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2026-08-05 04:40:58 +0000

    igc: defer sysctl-driven reinit to the admin task
    
    igc_sysctl_eee() and igc_sysctl_dmac() called igc_if_init() directly.
    
    Request the reset through iflib instead, and skipping while the interface
    is down; the new value is picked up by the next init.
    
    Unlike e1000, igc has no ASSERT_CTX_LOCK_HELD and no acquire_swflag
    path, so the defect is silent here rather than an assertion failure.
    
    While here also remove unnecessary igc_if_init uses:
    iflib_if_init_locked() already runs after IFDI_RESUME and
    IFDI_MEDIA_CHANGE, so the trailing *_if_init() only added an unstopped
    IFDI_INIT that the following iflib_stop() undoes.
    
    MFC after:      1 week
    Differential Revision:  https://reviews.freebsd.org/D58629
---
 sys/dev/igc/if_igc.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/sys/dev/igc/if_igc.c b/sys/dev/igc/if_igc.c
index 1f10d244f2dd..0900689e5f01 100644
--- a/sys/dev/igc/if_igc.c
+++ b/sys/dev/igc/if_igc.c
@@ -816,8 +816,6 @@ igc_if_resume(if_ctx_t ctx)
 	 */
 	igc_disable_broken_l1_2(ctx);
 
-	igc_if_init(ctx);
-
 	return(0);
 }
 
@@ -1297,8 +1295,6 @@ igc_if_media_change(if_ctx_t ctx)
 		device_printf(sc->dev, "Unsupported media type\n");
 	}
 
-	igc_if_init(ctx);
-
 	return (0);
 }
 
@@ -3357,6 +3353,16 @@ igc_set_flowcntl(SYSCTL_HANDLER_ARGS)
 	return (error);
 }
 
+static void
+igc_sysctl_request_reinit(struct igc_softc *sc)
+{
+	if ((if_getflags(iflib_get_ifp(sc->ctx)) & IFF_UP) == 0)
+		return;
+
+	iflib_request_reset(sc->ctx);
+	iflib_admin_intr_deferred(sc->ctx);
+}
+
 /*
  * Manage DMA Coalesce:
  * Control values:
@@ -3402,7 +3408,7 @@ igc_sysctl_dmac(SYSCTL_HANDLER_ARGS)
 			return (EINVAL);
 	}
 	/* Reinit the interface */
-	igc_if_init(sc->ctx);
+	igc_sysctl_request_reinit(sc);
 	return (error);
 }
 
@@ -3423,7 +3429,7 @@ igc_sysctl_eee(SYSCTL_HANDLER_ARGS)
 		return (error);
 
 	sc->hw.dev_spec._i225.eee_disable = (value != 0);
-	igc_if_init(sc->ctx);
+	igc_sysctl_request_reinit(sc);
 
 	return (0);
 }