git: 63d782348e44 - stable/15 - igc: Remove invalid debug ring pointer iteration

The branch stable/15 has been updated by kbowling:

URL: https://cgit.FreeBSD.org/src/commit/?id=63d782348e44f7635fcf9ff455d05490a8030e93

commit 63d782348e44f7635fcf9ff455d05490a8030e93
Author:     Kevin Bowling <kbowling@FreeBSD.org>
AuthorDate: 2026-08-12 03:03:11 +0000
Commit:     Kevin Bowling <kbowling@FreeBSD.org>
CommitDate: 2026-08-26 00:56:51 +0000

    igc: Remove invalid debug ring pointer iteration
    
    The debug routine reads queue registers by queue index.  It also
    advanced unused pointers to rings embedded in queue structures.  Those
    pointers had the wrong stride and could proceed beyond the ring object.
    
    Remove the unused pointer arithmetic.
    
    (cherry picked from commit 423927d6c3dc87628fc2a19f25b5b5c07b3b73e2)
---
 sys/dev/igc/if_igc.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/sys/dev/igc/if_igc.c b/sys/dev/igc/if_igc.c
index 6722061df54c..6f1df6d6fdf9 100644
--- a/sys/dev/igc/if_igc.c
+++ b/sys/dev/igc/if_igc.c
@@ -3540,8 +3540,6 @@ igc_print_debug_info(struct igc_softc *sc)
 {
 	device_t dev = iflib_get_dev(sc->ctx);
 	if_t ifp = iflib_get_ifp(sc->ctx);
-	struct tx_ring *txr = &sc->tx_queues->txr;
-	struct rx_ring *rxr = &sc->rx_queues->rxr;
 
 	if (if_getdrvflags(ifp) & IFF_DRV_RUNNING)
 		printf("Interface is RUNNING ");
@@ -3553,14 +3551,14 @@ igc_print_debug_info(struct igc_softc *sc)
 	else
 		printf("and ACTIVE\n");
 
-	for (int i = 0; i < sc->tx_num_queues; i++, txr++) {
+	for (int i = 0; i < sc->tx_num_queues; i++) {
 		device_printf(dev, "TX Queue %d ------\n", i);
 		device_printf(dev, "hw tdh = %d, hw tdt = %d\n",
 		    IGC_READ_REG(&sc->hw, IGC_TDH(i)),
 		    IGC_READ_REG(&sc->hw, IGC_TDT(i)));
 
 	}
-	for (int j=0; j < sc->rx_num_queues; j++, rxr++) {
+	for (int j = 0; j < sc->rx_num_queues; j++) {
 		device_printf(dev, "RX Queue %d ------\n", j);
 		device_printf(dev, "hw rdh = %d, hw rdt = %d\n",
 		    IGC_READ_REG(&sc->hw, IGC_RDH(j)),