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Message-ID: <20250803180216.3569139-1-m-malladi@ti.com>
Date: Sun, 3 Aug 2025 23:32:16 +0530
From: Meghana Malladi <m-malladi@...com>
To: <namcao@...utronix.de>, <r-gunasekaran@...com>, <jacob.e.keller@...el.com>,
<m-malladi@...com>, <sdf@...ichev.me>, <john.fastabend@...il.com>,
<hawk@...nel.org>, <daniel@...earbox.net>, <ast@...nel.org>,
<pabeni@...hat.com>, <kuba@...nel.org>, <edumazet@...gle.com>,
<davem@...emloft.net>, <andrew+netdev@...n.ch>
CC: <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<netdev@...r.kernel.org>, <linux-arm-kernel@...ts.infradead.org>,
<srk@...com>, Vignesh Raghavendra <vigneshr@...com>,
Roger Quadros
<rogerq@...nel.org>, <danishanwar@...com>
Subject: [PATCH net v2] net: ti: icssg-prueth: Fix skb handling for XDP_PASS
emac_rx_packet() is a common function for handling traffic
for both xdp and non-xdp use cases. Use common logic for
handling skb with or without xdp to prevent any incorrect
packet processing. This patch fixes ping working with
XDP_PASS for icssg driver.
Fixes: 62aa3246f4623 ("net: ti: icssg-prueth: Add XDP support")
Signed-off-by: Meghana Malladi <m-malladi@...com>
Reviewed-by: Jacob Keller <jacob.e.keller@...el.com>
---
v2-v1:
- Collected RB tag from Jacob Keller <jacob.e.keller@...el.com>
- Populated headroom from xdp buffer instead of hardcoding as
pointed out by Jakub Kicinski <kuba@...nel.org>
drivers/net/ethernet/ti/icssg/icssg_common.c | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/drivers/net/ethernet/ti/icssg/icssg_common.c b/drivers/net/ethernet/ti/icssg/icssg_common.c
index 12f25cec6255..57e5f1c88f50 100644
--- a/drivers/net/ethernet/ti/icssg/icssg_common.c
+++ b/drivers/net/ethernet/ti/icssg/icssg_common.c
@@ -706,9 +706,9 @@ static int emac_rx_packet(struct prueth_emac *emac, u32 flow_id, u32 *xdp_state)
struct page_pool *pool;
struct sk_buff *skb;
struct xdp_buff xdp;
+ int headroom, ret;
u32 *psdata;
void *pa;
- int ret;
*xdp_state = 0;
pool = rx_chn->pg_pool;
@@ -757,22 +757,23 @@ static int emac_rx_packet(struct prueth_emac *emac, u32 flow_id, u32 *xdp_state)
xdp_prepare_buff(&xdp, pa, PRUETH_HEADROOM, pkt_len, false);
*xdp_state = emac_run_xdp(emac, &xdp, page, &pkt_len);
- if (*xdp_state == ICSSG_XDP_PASS)
- skb = xdp_build_skb_from_buff(&xdp);
- else
+ if (*xdp_state != ICSSG_XDP_PASS)
goto requeue;
+ headroom = xdp.data - xdp.data_hard_start;
+ pkt_len = xdp.data_end - xdp.data;
} else {
- /* prepare skb and send to n/w stack */
- skb = napi_build_skb(pa, PAGE_SIZE);
+ headroom = PRUETH_HEADROOM;
}
+ /* prepare skb and send to n/w stack */
+ skb = napi_build_skb(pa, PAGE_SIZE);
if (!skb) {
ndev->stats.rx_dropped++;
page_pool_recycle_direct(pool, page);
goto requeue;
}
- skb_reserve(skb, PRUETH_HEADROOM);
+ skb_reserve(skb, headroom);
skb_put(skb, pkt_len);
skb->dev = ndev;
base-commit: 759dfc7d04bab1b0b86113f1164dc1fec192b859
--
2.43.0
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