Using num_online_cpus() to report number of queues is actually not
correct, as reported by Michael[1].

netif_get_num_default_rss_queues() was used to replace num_online_cpus()
in the past, but tg3 ethtool callbacks didn't get converted. Doing it
now.

Link: https://lore.kernel.org/all/CACKFLim7ruspmqvjr6bNRq5Z_XXVk3vVaLZOons7kMCzsEG23A@mail.gmail.com/#t [1]

Signed-off-by: Breno Leitao <leitao@debian.org>
Suggested-by: Michael Chan <michael.chan@broadcom.com>
---
 drivers/net/ethernet/broadcom/tg3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
index fa58c3ffceb06..e21f7c6a6de70 100644
--- a/drivers/net/ethernet/broadcom/tg3.c
+++ b/drivers/net/ethernet/broadcom/tg3.c
@@ -12729,7 +12729,7 @@ static u32 tg3_get_rx_ring_count(struct net_device *dev)
 	if (netif_running(tp->dev))
 		return tp->rxq_cnt;
 
-	return min(num_online_cpus(), TG3_RSS_MAX_NUM_QS);
+	return min_t(u32, netif_get_num_default_rss_queues(), tp->rxq_max);
 }
 
 static u32 tg3_get_rxfh_indir_size(struct net_device *dev)

---
base-commit: 6fc33710cd6c55397e606eeb544bdf56ee87aae5
change-id: 20251107-tg3_counts-95822e6df6bc

Best regards,
--  
Breno Leitao <leitao@debian.org>

On Fri, Nov 7, 2025 at 2:37 AM Breno Leitao <leitao@debian.org> wrote:
>
> Using num_online_cpus() to report number of queues is actually not
> correct, as reported by Michael[1].
>
> netif_get_num_default_rss_queues() was used to replace num_online_cpus()
> in the past, but tg3 ethtool callbacks didn't get converted. Doing it
> now.
>
> Link: https://lore.kernel.org/all/CACKFLim7ruspmqvjr6bNRq5Z_XXVk3vVaLZOons7kMCzsEG23A@mail.gmail.com/#t [1]
>
> Signed-off-by: Breno Leitao <leitao@debian.org>
> Suggested-by: Michael Chan <michael.chan@broadcom.com>

Thanks.
Reviewed-by: Michael Chan <michael.chan@broadcom.com>