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Message-ID: <20250117194815.1514410-6-kuba@kernel.org>
Date: Fri, 17 Jan 2025 11:48:14 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: davem@...emloft.net
Cc: netdev@...r.kernel.org,
	edumazet@...gle.com,
	pabeni@...hat.com,
	andrew+netdev@...n.ch,
	horms@...nel.org,
	michael.chan@...adcom.com,
	pavan.chebbi@...adcom.com,
	ap420073@...il.com,
	Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next 5/6] eth: bnxt: allocate enough buffer space to meet HDS threshold

Now that we can configure HDS threshold separately from the rx_copybreak
HDS threshold may be higher than rx_copybreak.

We need to make sure that we have enough space for the headers.

Fixes: 6b43673a25c3 ("bnxt_en: add support for hds-thresh ethtool command")
Signed-off-by: Jakub Kicinski <kuba@...nel.org>
---
 drivers/net/ethernet/broadcom/bnxt/bnxt.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt.c b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
index 2eeed4c11b64..19e723493c4e 100644
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt.c
@@ -4671,9 +4671,10 @@ void bnxt_set_ring_params(struct bnxt *bp)
 				  ALIGN(max(NET_SKB_PAD, XDP_PACKET_HEADROOM), 8) -
 				  SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 		} else {
-			rx_size = SKB_DATA_ALIGN(max(BNXT_DEFAULT_RX_COPYBREAK,
-						     bp->rx_copybreak) +
-						 NET_IP_ALIGN);
+			rx_size = max3(BNXT_DEFAULT_RX_COPYBREAK,
+				       bp->rx_copybreak,
+				       bp->dev->cfg_pending->hds_thresh);
+			rx_size = SKB_DATA_ALIGN(rx_size + NET_IP_ALIGN);
 			rx_space = rx_size + NET_SKB_PAD +
 				SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
 		}
-- 
2.48.1


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