be2net: fix data race in be_get_new_eqd

In be_get_new_eqd(), statistics of pkts, protected by u64_stats_sync, are
read and accumulated in ignorance of possible u64_stats_fetch_retry()
events. Before the commit in question, these statistics were retrieved
one by one directly from queues. Fix this by reading them into temporary
variables first.

Fixes: 2094777 ("be2net: set interrupt moderation for Skyhawk-R using EQ-DB")
Signed-off-by: David Yang <mmyangfl@gmail.com>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20260119153440.1440578-1-mmyangfl@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: yangfl

drivers/net/ethernet/emulex/benet/be_main.c

@@ -2141,7 +2141,7 @@ static int be_get_new_eqd(struct be_eq_obj *eqo)
 	struct be_aic_obj *aic;
 	struct be_rx_obj *rxo;
 	struct be_tx_obj *txo;
-	u64 rx_pkts = 0, tx_pkts = 0;
+	u64 rx_pkts = 0, tx_pkts = 0, pkts;
 	ulong now;
 	u32 pps, delta;
 	int i;
@@ -2157,15 +2157,17 @@ static int be_get_new_eqd(struct be_eq_obj *eqo)
 	for_all_rx_queues_on_eq(adapter, eqo, rxo, i) {
 		do {
 			start = u64_stats_fetch_begin(&rxo->stats.sync);
-			rx_pkts += rxo->stats.rx_pkts;
+			pkts = rxo->stats.rx_pkts;
 		} while (u64_stats_fetch_retry(&rxo->stats.sync, start));
+		rx_pkts += pkts;
 	}
 
 	for_all_tx_queues_on_eq(adapter, eqo, txo, i) {
 		do {
 			start = u64_stats_fetch_begin(&txo->stats.sync);
-			tx_pkts += txo->stats.tx_reqs;
+			pkts = txo->stats.tx_reqs;
 		} while (u64_stats_fetch_retry(&txo->stats.sync, start));
+		tx_pkts += pkts;
 	}
 
 	/* Skip, if wrapped around or first calculation */